Input validation error in libcap - CVE-2025-1390
Published: February 25, 2025
Vulnerability identifier: #VU104166
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2025-1390
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: www.friedhoff.org
Affected software:
libcap
libcap
Detailed vulnerability description
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.
How to mitigate CVE-2025-1390
Install updates from vendor's website.