Use After Free Affecting xorg-server package, versions <21.1.7-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
1.27% (86th percentile)

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  • Snyk IDSNYK-ALPINE321-XORGSERVER-8490260
  • published6 Dec 2024
  • disclosed27 Mar 2023

Introduced: 27 Mar 2023

CVE-2023-0494  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 xorg-server to version 21.1.7-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-server package and not the xorg-server package as distributed by Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.

CVSS Scores

version 3.1