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Use After Free Affecting xorg-server package, versions <2:1.20.11-1+deb11u5

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.12% (46th percentile)
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NVD
7.8 high
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SUSE
7.8 high
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Red Hat
7.8 high

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  • Snyk ID SNYK-DEBIAN11-XORGSERVER-3312156
  • published 7 Feb 2023
  • disclosed 27 Mar 2023
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Introduced: 7 Feb 2023

CVE-2023-0494 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Debian:11 xorg-server to version 2:1.20.11-1+deb11u5 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 Debian. See How to fix? for Debian:11 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.