USN-4905-2: X.Org X Server vulnerability

USN-4905-2: X.Org X Server vulnerability

USN-4905-1 fixed a vulnerability in X.Org. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
certain lengths of XInput extension ChangeFeedbackControl requests. An
attacker could use this issue to cause the server to crash, resulting in a
denial of service, or possibly execute arbitrary code.
Source: USN-4905-2: X.Org X Server vulnerability