SB2025022512 - Ubuntu update for libcap2

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Main Vulnerability Database SB2025022512

SB2025022512 - Ubuntu update for libcap2

Published: February 25, 2025

Security Bulletin ID SB2025022512
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Input validation error (CVE-ID: CVE-2025-1390)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when parsing groups names. The PAM module pam_cap.so of libcap configuration supports group names starting with “@”, during actual parsing, configurations not starting with “@” are incorrectly recognized as group names. A local user can use this vulnerability to escalate privileges on systems where "/etc/security/capability.conf" is used to configure user inherited privileges by constructing specific usernames.


Remediation

Install update from vendor's website.

References