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RDxR10anddanielsagi
2e4684658f
* Update certificates.py Regex expression update for email * fixed linting issues Co-authored-by: danielsagi <danielsagi2009@gmail.com>
56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
import ssl
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import logging
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import base64
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import re
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from kube_hunter.core.types import Hunter, KubernetesCluster, InformationDisclosure
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from kube_hunter.core.events import handler
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from kube_hunter.core.events.types import Vulnerability, Event, Service
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logger = logging.getLogger(__name__)
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email_pattern = re.compile(rb"([a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+)")
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class CertificateEmail(Vulnerability, Event):
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"""The Kubernetes API Server advertises a public certificate for TLS.
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This certificate includes an email address, that may provide additional information for an attacker on your
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organization, or be abused for further email based attacks."""
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def __init__(self, email):
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Vulnerability.__init__(
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self,
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KubernetesCluster,
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"Certificate Includes Email Address",
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category=InformationDisclosure,
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vid="KHV021",
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)
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self.email = email
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self.evidence = f"email: {self.email}"
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@handler.subscribe(Service)
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class CertificateDiscovery(Hunter):
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"""Certificate Email Hunting
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Checks for email addresses in kubernetes ssl certificates
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"""
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def __init__(self, event):
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self.event = event
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def execute(self):
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try:
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logger.debug("Passive hunter is attempting to get server certificate")
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addr = (str(self.event.host), self.event.port)
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cert = ssl.get_server_certificate(addr)
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except ssl.SSLError:
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# If the server doesn't offer SSL on this port we won't get a certificate
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return
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self.examine_certificate(cert)
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def examine_certificate(self, cert):
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c = cert.strip(ssl.PEM_HEADER).strip("\n").strip(ssl.PEM_FOOTER).strip("\n")
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certdata = base64.b64decode(c)
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emails = re.findall(email_pattern, certdata)
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for email in emails:
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self.publish_event(CertificateEmail(email=email))
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