Out-of-bounds Read Affecting polkit-libs package, versions <0:0.115-13.0.1.el8_5.1


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.14% (50th percentile)

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  • Snyk IDSNYK-ORACLE8-POLKITLIBS-2603928
  • published10 Apr 2022
  • disclosed28 Jan 2022

Introduced: 28 Jan 2022

CVE-2021-4034  (opens in a new tab)
CWE-125  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Oracle:8 polkit-libs to version 0:0.115-13.0.1.el8_5.1 or higher.
This issue was patched in ELSA-2022-0267.

NVD Description

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

A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.

References

CVSS Scores

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