USN-3456-1: X.Org X server vulnerabilities

17 October 2017

Several security issues were fixed in the X.Org X server.

Releases

Packages

Details

It was discovered that the X.Org X server incorrectly handled certain
lengths. An attacker able to connect to an X server, either locally or
remotely, could use these issues to crash the server, or possibly execute
arbitrary code.

Update instructions

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

Ubuntu 17.04
Ubuntu 16.04
Ubuntu 14.04

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