CVE-2018-16888

Published: 14 January 2019

It was discovered systemd does not correctly check the content of PIDFile files before using it to kill processes. When a service is run from an unprivileged user (e.g. User field set in the service file), a local attacker who is able to write to the PIDFile of the mentioned service may use this flaw to trick systemd into killing other services and/or privileged processes. Versions before v237 are vulnerable.

Priority

Low

CVSS 3 base score: 4.7

Status

Package Release Status
systemd
Launchpad, Ubuntu, Debian
Upstream
Released (237-1)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(237-3ubuntu10.9)
Ubuntu 16.04 LTS (Xenial Xerus)
Released (229-4ubuntu21.27)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(code not built)
Patches:
Upstream: https://github.com/systemd/systemd/commit/db256aab13d8a89d583ecd2bacf0aca87c66effc
Upstream: https://github.com/systemd/systemd/commit/73969ab61c39357e6892747e43307fbf07cafbed