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CVE-2023-0494

Public on 2023-02-07
Modified on 2024-01-16
Description

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.

Severity
Important
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CVSS v3 Base Score
7.8
See breakdown
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 tigervnc 2023-05-11 18:00 ALAS-2023-1746
Amazon Linux 2 - Core tigervnc 2024-05-23 22:04 ALAS2-2024-2558
Amazon Linux 1 xorg-x11-server 2023-03-17 15:53 ALAS-2023-1702
Amazon Linux 2 - Core xorg-x11-server 2023-03-02 22:35 ALAS2-2023-1982
Amazon Linux 2023 xorg-x11-server 2023-03-11 01:10 ALAS2023-2023-131

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H