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.
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "binaries": [ { "xvfb": "2:1.15.1-0ubuntu2.11+esm4", "xdmx": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-core-dbg": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-core-udeb-dbgsym": "2:1.15.1-0ubuntu2.11+esm4", "xdmx-tools-dbgsym": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-dev": "2:1.15.1-0ubuntu2.11+esm4", "xorg-server-source": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-core": "2:1.15.1-0ubuntu2.11+esm4", "xserver-common": "2:1.15.1-0ubuntu2.11+esm4", "xnest-dbgsym": "2:1.15.1-0ubuntu2.11+esm4", "xnest": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xephyr": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-xmir": "2:1.15.1-0ubuntu2.11+esm4", "xdmx-tools": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-dev-dbgsym": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-core-dbgsym": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xephyr-dbgsym": "2:1.15.1-0ubuntu2.11+esm4", "xdmx-dbgsym": "2:1.15.1-0ubuntu2.11+esm4", "xvfb-dbgsym": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-core-udeb": "2:1.15.1-0ubuntu2.11+esm4", "xserver-xorg-xmir-dbgsym": "2:1.15.1-0ubuntu2.11+esm4" } ] }