USN-4656-2: X.Org X Server vulnerabilities

07 December 2020

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




USN-4656-1 fixed several vulnerabilities in X.Org. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory 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 14.04

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

Related notices

  • USN-4656-1: xvfb, xmir-hwe-16.04, xorg-server-hwe-18.04, xserver-xorg-legacy, xorg-server-source-hwe-16.04, xorg-server-source-hwe-18.04, xserver-xorg-core-udeb, xorg-server, xserver-xorg-dev, xserver-xorg-core-hwe-16.04, xserver-xephyr, xorg-server-source, xserver-xorg-legacy-hwe-18.04, xwayland-hwe-18.04, xdmx-tools, xserver-xorg-core-hwe-18.04, xserver-xephyr-hwe-18.04, xserver-xorg-dev-hwe-16.04, xserver-xorg-dev-hwe-18.04, xwayland-hwe-16.04, xserver-xephyr-hwe-16.04, xserver-xorg-legacy-hwe-16.04, xserver-common, xserver-xorg-xmir, xwayland, xnest, xserver-xorg-core, xdmx, xmir, xorg-server-hwe-16.04