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Out-of-bounds Write Affecting xorg-server package, versions <2:1.20.4-1+deb10u13

0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.17% (53rd percentile)
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NVD
9.8 critical
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SUSE
8.4 high
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Red Hat
9.8 critical

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  • Snyk ID SNYK-DEBIAN10-XORGSERVER-6159333
  • published 16 Jan 2024
  • disclosed 18 Jan 2024
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Introduced: 16 Jan 2024

CVE-2023-6816 Open this link in a new tab
CWE-787 Open this link in a new tab

How to fix?

Upgrade Debian:10 xorg-server to version 2:1.20.4-1+deb10u13 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:10 relevant fixed versions and status.

A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.

References