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Out-of-bounds Write Affecting xorg-server package, versions <2:1.20.11-1+deb11u4

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 1.99% (89th percentile)
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NVD
8.8 high
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SUSE
7.1 high
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Red Hat
8.8 high

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  • Snyk ID SNYK-DEBIAN11-XORGSERVER-3169303
  • published 14 Dec 2022
  • disclosed 14 Dec 2022
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Introduced: 14 Dec 2022

CVE-2022-46340 Open this link in a new tab
CWE-787 Open this link in a new tab

How to fix?

Upgrade Debian:11 xorg-server to version 2:1.20.11-1+deb11u4 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 security flaw occurs becuase the swap handler for the XTestFakeInput request of the XTest extension may corrupt the stack if GenericEvents with lengths larger than 32 bytes are sent through a the XTestFakeInput request. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions. This issue does not affect systems where client and server use the same byte order.

References