Ubuntu Security Notice 2500-1 – Olivier Fourdan discovered that the X.Org X server incorrectly handled XkbSetGeometry requests resulting in an information leak. An attacker able to connect to an X server, either locally or remotely, could use this issue to possibly obtain sensitive information. It was discovered that the X.Org X server incorrectly handled certain trapezoids. An attacker able to connect to an X server, either locally or remotely, could use this issue to possibly crash the server. This issue only affected Ubuntu 12.04 LTS. Various other issues were also addressed.