Privilege Chaining Affecting systemd package, versions <0:239-29.el8


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-RHEL8-SYSTEMD-3728130
  • published26 Jul 2021
  • disclosed25 Apr 2019

Introduced: 25 Apr 2019

CVE-2019-3844  (opens in a new tab)
CWE-268  (opens in a new tab)

How to fix?

Upgrade RHEL:8 systemd to version 0:239-29.el8 or higher.
This issue was patched in RHSA-2020:1794.

NVD Description

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

It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled.

CVSS Scores

version 3.1