Incorrect Authorization Affecting systemd-pam package, versions <0:239-45.el8


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.22% (61st percentile)

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  • Snyk IDSNYK-CENTOS8-SYSTEMDPAM-2103030
  • published26 Jul 2021
  • disclosed8 Apr 2019

Introduced: 8 Apr 2019

CVE-2019-3842  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Centos:8 systemd-pam to version 0:239-45.el8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd-pam package and not the systemd-pam package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

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".

CVSS Scores

version 3.1