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Use After Free Affecting xorg-server package, versions <2:1.20.4-1+deb10u9

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.05% (15th percentile)
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NVD
7.8 high
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SUSE
7 high
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Red Hat
7.8 high

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  • Snyk ID SNYK-DEBIAN10-XORGSERVER-5296041
  • published 30 Mar 2023
  • disclosed 30 Mar 2023
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Introduced: 30 Mar 2023

CVE-2023-1393 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Debian:10 xorg-server to version 2:1.20.4-1+deb10u9 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 Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.

References