USN-1992-1: Linux kernel vulnerability

22 October 2013

linux vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 LTS

Summary

The system could be made to expose sensitive information to a local user.

Software Description

  • linux - Linux kernel

Details

An information leak was discovered in the Linux kernel when reading broadcast messages from the notify_policy interface of the IPSec key_socket. A local user could exploit this flaw to examine potentially sensitive information in kernel memory.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04 LTS
linux-image-3.2.0-55-generic - 3.2.0-55.85
linux-image-3.2.0-55-generic-pae - 3.2.0-55.85
linux-image-3.2.0-55-highbank - 3.2.0-55.85
linux-image-3.2.0-55-omap - 3.2.0-55.85
linux-image-3.2.0-55-powerpc-smp - 3.2.0-55.85
linux-image-3.2.0-55-powerpc64-smp - 3.2.0-55.85
linux-image-3.2.0-55-virtual - 3.2.0-55.85

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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