Ubuntu: (Multiple Advisories) (CVE-2023-0494): X.Org X Server vulnerabilities

Ubuntu: (Multiple Advisories) (CVE-2023-0494): X.Org X Server vulnerabilities

Severity

7

CVSS

(AV:L/AC:L/Au:S/C:C/I:C/A:C)

Published

02/16/2023

Created

03/29/2023

Added

03/22/2023

Modified

01/28/2025

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.

Solution(s)

• ubuntu-pro-upgrade-xserver-xorg-core
• ubuntu-pro-upgrade-xserver-xorg-core-hwe-16-04
• ubuntu-pro-upgrade-xserver-xorg-core-hwe-18-04
• ubuntu-pro-upgrade-xwayland
• ubuntu-pro-upgrade-xwayland-hwe-16-04
• ubuntu-pro-upgrade-xwayland-hwe-18-04

References

• https://attackerkb.com/topics/cve-2023-0494
• CVE - 2023-0494
• USN-5778-2
• USN-5846-1