VULNERABILITY INTELLIGENCE

CVE-2018-6954

CVSS score7.8 HIGH
EPSS probability0.53%
CISA KEVNot currently listed
Published2018-02-13
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

systemd-tmpfiles in systemd through 237 mishandles symlinks present in non-terminal path components, which allows local users to obtain ownership of arbitrary files via vectors involving creation of a directory and a file under that directory, and later replacing that directory with a symlink. This occurs even if the fs.protected_symlinks sysctl is turned on.

Weakness classification

  • CWE-59: Improper Link Resolution Before File Access ('Link Following')

Primary references