Vasiliy Kulikov discovered that taskstats did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. Updated packages are available from security.ubuntu.com.
========================================================================== Ubuntu Security Notice USN-1275-1 November 21, 2011 linux vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 11.10 Summary: The system could be made to expose sensitive information locally. Software Description: - linux: Linux kernel Details: Vasiliy Kulikov discovered that taskstats did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.10: linux-image-3.0.0-13-generic 3.0.0-13.22 linux-image-3.0.0-13-generic-pae 3.0.0-13.22 linux-image-3.0.0-13-omap 3.0.0-13.22 linux-image-3.0.0-13-powerpc 3.0.0-13.22 linux-image-3.0.0-13-powerpc-smp 3.0.0-13.22 linux-image-3.0.0-13-powerpc64-smp 3.0.0-13.22 linux-image-3.0.0-13-server 3.0.0-13.22 linux-image-3.0.0-13-virtual 3.0.0-13.22 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well. References: http://www.ubuntu.com/usn/usn-1275-1 CVE-2011-2494 Package Information: https://launchpad.net/ubuntu/+source/linux/3.0.0-13.22