============================================================================
Ubuntu Security Notice USN-2436-2
December 10, 2014

xorg-server, xorg-server-lts-trusty vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

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.

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.

References:
  https://www.ubuntu.com/usn/usn-2436-2
  https://www.ubuntu.com/usn/usn-2436-1
  https://launchpad.net/bugs/1400942

Package Information:
  https://launchpad.net/ubuntu/+source/xorg-server/2:1.16.0-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/xorg-server/2:1.15.1-0ubuntu2.5
  https://launchpad.net/ubuntu/+source/xorg-server/2:1.11.4-0ubuntu10.16

https://launchpad.net/ubuntu/+source/xorg-server-lts-trusty/2:1.15.1-0ubuntu2~precise4