USN-4490-1: X.Org X Server vulnerability
8 September 2020
X.Org X Server could be made to crash or run programs if it received specially crafted input.
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 incorrectly handled the
XkbSetNames function. 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 20.04
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-4488-2: xorg-server-source, xdmx-tools, xserver-common, xvfb, xorg-server, xserver-xorg-xmir, xdmx, xserver-xephyr, xserver-xorg-dev, xserver-xorg-core, xserver-xorg-core-udeb, xnest