Use After Free Affecting xorg-x11-server-devel package, versions <0:1.17.4-18.51.amzn1
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Test your applications- Snyk ID SNYK-AMZN201803-XORGX11SERVERDEVEL-3369563
- published 23 Mar 2023
- disclosed 27 Mar 2023
Introduced: 23 Mar 2023
CVE-2023-0494 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2018.03 xorg-x11-server-devel 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-devel package and not the xorg-x11-server-devel 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.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-0494
- https://bugzilla.redhat.com/show_bug.cgi?id=2165995
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/0ba6d8c37071131a49790243cdac55392ecf71ec
- https://lists.x.org/archives/xorg-announce/2023-February/003320.html
- https://security.gentoo.org/glsa/202305-30