Vulnerability Details

Sudo Heap-Based Buffer Overflow (Baron Samedit) Vulnerability (Active LSC)

Published: 2021-01-27 06:47:49
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:C/I:C/A:C

Summary:
Sudo is prone to a heap-based buffer overflow dubbed 'Baron Samedit'.

Detection Method:
Runs a specific SSH command after the login to the target which is known to trigger an error message on affected versions of Sudo.

Technical Details:
Sudo is allowing privilege escalation to root via 'sudoedit -s' and a command-line argument that ends with a single backslash character.

Affected Versions:
All legacy versions from 1.8.2 to 1.8.31p2 and all stable versions from 1.9.0 to 1.9.5p1 in their default configuration.

Recommendations:
Update to version 1.9.5p2 or later.

Detection Type:
exploit

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2021-3156

References:

https://www.sudo.ws/stable.html#1.9.5p2
https://blog.qualys.com/vulnerabilities-research/2021/01/26/cve-2021-3156-heap-based-buffer-overflow-in-sudo-baron-samedit

Severity
High
CVSS Score
10.0
Published
2021-01-27
Modified
2021-01-27
Category
Buffer overflow

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