Use After Free Affecting xorg-x11-server-common package, versions <0:1.17.4-18.51.amzn1


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.18% (57th percentile)

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  • Snyk IDSNYK-AMZN201803-XORGX11SERVERCOMMON-3369660
  • published23 Mar 2023
  • disclosed27 Mar 2023

Introduced: 23 Mar 2023

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

How to fix?

Upgrade Amazon-Linux:2018.03 xorg-x11-server-common to version 0:1.17.4-18.51.amzn1 or higher.
This issue was patched in ALAS-2023-1702.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-common package and not the xorg-x11-server-common package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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