Pablo Neira Ayuso discovered a flaw in the credentials of netlink messages. An unprivileged local attacker could exploit this by getting a netlink based service, that relies on netlink credentials, to perform privileged actions.
Updated packages are available from security.ubuntu.com.
========================================================================== Ubuntu Security Notice USN-1610-1 October 12, 2012 linux vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 LTS Summary: The system could be made to perform privileged actions as an administrator. Software Description: - linux: Linux kernel Details: Pablo Neira Ayuso discovered a flaw in the credentials of netlink messages. An unprivileged local attacker could exploit this by getting a netlink based service, that relies on netlink credentials, to perform privileged actions. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.2.0-32-generic 3.2.0-32.51 linux-image-3.2.0-32-generic-pae 3.2.0-32.51 linux-image-3.2.0-32-highbank 3.2.0-32.51 linux-image-3.2.0-32-omap 3.2.0-32.51 linux-image-3.2.0-32-powerpc-smp 3.2.0-32.51 linux-image-3.2.0-32-powerpc64-smp 3.2.0-32.51 linux-image-3.2.0-32-virtual 3.2.0-32.51 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-1610-1 CVE-2012-3520 Package Information: https://launchpad.net/ubuntu/+source/linux/3.2.0-32.51