1. Ubuntu Security Notices
  2. USN-3456-1

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

Publication date

17 October 2017

Overview

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
17.04 zesty xserver-xorg-core –  2:1.19.3-1ubuntu1.3
16.04 xenial xserver-xorg-core –  2:1.18.4-0ubuntu0.7
xserver-xorg-core-hwe-16.04 –  2:1.19.3-1ubuntu1~16.04.4
14.04 trusty xserver-xorg-core –  2:1.15.1-0ubuntu2.11
xserver-xorg-core-lts-xenial –  2:1.18.3-1ubuntu2.3~trusty4

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References

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