Ubuntu 14.10 USN-2436-2 Moderate: X.Org X Server Security Concerns

ubuntu

December 10, 2014

USN-2436-1 contained incomplete fixes for the X.Org X server.

Summary

USN-2436-1 contained incomplete fixes for the X.Org X server.

Software Description:

- xorg-server: X.Org X11 server

- xorg-server-lts-trusty: Xorg X server - source files

Details:

USN-2436-1 fixed vulnerabilities in the X.Org X server. Since publication,

additional fixes have been made available for these issues. This update

adds the additional fixes.

Original advisory details:

Ilja van Sprundel discovered a multitude of security issues in the X.Org X

server. An attacker able to connect to an X server, either locally or

remotely, could use these issues to cause the X server to crash or execute

arbitrary code resulting in possible privilege escalation.

Topics Covered

security advisory privilege escalation arbitrary code execution Ubuntu X.Org X server

Update Instructions

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

Ubuntu 14.10:
  xserver-xorg-core               2:1.16.0-1ubuntu1.2

Ubuntu 14.04 LTS:
  xserver-xorg-core               2:1.15.1-0ubuntu2.5

Ubuntu 12.04 LTS:
  xserver-xorg-core               2:1.11.4-0ubuntu10.16
  xserver-xorg-core-lts-trusty    2:1.15.1-0ubuntu2~precise4

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