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

0.0
medium

Snyk CVSS

    Attack Complexity High

    Threat Intelligence

    EPSS 0.22% (60th percentile)
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NVD
7 high
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SUSE
4.5 medium
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Red Hat
4.5 medium

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  • Snyk ID SNYK-CENTOS8-SYSTEMDPAM-2103030
  • published 26 Jul 2021
  • disclosed 8 Apr 2019
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Introduced: 8 Apr 2019

CVE-2019-3842 Open this link in a new tab
CWE-863 Open this link 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".

References