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CVE-2019-3842

Published: 8 April 2019

In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the "allow_active" element rather than "allow_any".

Priority

Medium

CVSS 3 base score: 7.0

Status

Package Release Status
systemd
Launchpad, Ubuntu, Debian
bionic
Released (237-3ubuntu10.19)
cosmic
Released (239-7ubuntu10.12)
precise Does not exist

trusty
Released (204-5ubuntu20.31)
upstream
Released (241-3)
xenial
Released (229-4ubuntu21.21)
Patches:
upstream: https://github.com/systemd/systemd/commit/83d4ab55336ff8a0643c6aa627b31e351a24040a