Ubuntu 22.10 USN-5778-1 Moderate: X.Org X Server Privilege Escalation

ubuntu

December 14, 2022

Several security issues were fixed in X.Org X Server.

Summary

Several security issues were fixed in X.Org X Server.

Software Description:

- xorg-server: X.Org X11 server

- xwayland: X server for running X clients under Wayland

- xorg-server-hwe-18.04: X.Org X11 server

Details:

Jan-Niklas Sohn discovered that X.Org X Server extensions contained

multiple security issues. An attacker could possibly use these issues to

cause the X Server to crash, execute arbitrary code, or escalate

privileges.

Topics Covered

security advisory moderate privilege escalation ubuntu xwayland xorg-x-server

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.10:
   xserver-xorg-core               2:21.1.4-2ubuntu1.3
   xwayland                        2:22.1.3-2ubuntu0.2

Ubuntu 22.04 LTS:
   xserver-xorg-core               2:21.1.3-2ubuntu2.5
   xwayland                        2:22.1.1-1ubuntu0.4

Ubuntu 20.04 LTS:
   xserver-xorg-core               2:1.20.13-1ubuntu1~20.04.5
   xwayland                        2:1.20.13-1ubuntu1~20.04.5

Ubuntu 18.04 LTS:
   xserver-xorg-core               2:1.19.6-1ubuntu4.13
   xserver-xorg-core-hwe-18.04     2:1.20.8-2ubuntu2.2~18.04.9
   xwayland                        2:1.19.6-1ubuntu4.13
   xwayland-hwe-18.04              2:1.20.8-2ubuntu2.2~18.04.9

After a standard system update you need to reboot your computer to make all
the necessary changes.