USN-4656-1: X.Org X Server vulnerabilities
1 December 2020
Several security issues were fixed in X.Org X Server.
Releases
Packages
- xorg-server - X.Org X11 server
- xorg-server-hwe-16.04 - X.Org X11 server
- xorg-server-hwe-18.04 - X.Org X11 server
Details
Jan-Niklas Sohn discovered that the X.Org X Server XKB extension
incorrectly handled certain inputs. A local attacker could possibly use
this issue to escalate privileges.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
After a standard system update you need to reboot your computer to make all
the necessary changes.
References
Related notices
- USN-4656-2: xserver-xorg-dev, xserver-xorg-xmir, xnest, xserver-common, xserver-xorg-core, xserver-xorg-core-udeb, xdmx, xserver-xephyr, xvfb, xdmx-tools, xorg-server-source, xorg-server