Ubuntu Update for Linux kernel vulnerabilities USN-1232-2

Please Install the Updated Packages.

USN-1232-1 fixed vulnerabilities in the X.Org X server. A regression was found on Ubuntu 10.04 LTS that affected GLX support. This update temporarily disables the fix for CVE-2010-4818 that introduced the regression. We apologize for the inconvenience. Original advisory details: It was discovered that the X server incorrectly handled certain malformed input. An authorized attacker could exploit this to cause the X server to crash, leading to a denial or service, or possibly execute arbitrary code with root privileges. This issue only affected Ubuntu 10.04 LTS and 10.10. (CVE-2010-4818) It was discovered that the X server incorrectly handled certain malformed input. An authorized attacker could exploit this to cause the X server to crash, leading to a denial or service, or possibly read arbitrary data from the X server process. This issue only affected Ubuntu 10.04 LTS. (CVE-2010-4819) Vladz discovered that the X server incorrectly handled lock files. A local attacker could use this flaw to determine if a file existed or not. (CVE-2011-4028) Vladz discovered that the X server incorrectly handled setting lock file permissions. A local attacker could use this flaw to gain read permissions on arbitrary files and view sensitive information. (CVE-2011-4029)

xorg-server on Ubuntu 10.04 LTS