VULNERABILITY INTELLIGENCE
CVE-2021-3156
CVSS score7.8 HIGH
EPSS probability99.96%
CISA KEVKnown exploited vulnerability
Published2021-01-26
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Known Exploited Vulnerability
Sudo Heap-Based Buffer Overflow Vulnerability
Vendor / product: Sudo / Sudo
Description
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.
Weakness classification
- CWE-193: Off-by-one Error
Primary references
- cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
- cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
- cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
- cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
- cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Exploit, Mailing List, Third Party Advisory
- cve@mitre.org — Exploit, Mailing List, Third Party Advisory
- cve@mitre.org — Exploit, Mailing List, Third Party Advisory
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Exploit, Mailing List, Third Party Advisory