USN-1322-1: Linux kernel vulnerability

Ubuntu Security Notice USN-1322-1

9th January, 2012

linux vulnerability

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

  • Ubuntu 11.10

Summary

Several security issues were fixed in the kernel.

Software description

  • linux - Linux kernel

Details

Nick Bowler discovered the kernel GHASH message digest algorithm
incorrectly handled error conditions. A local attacker could exploit this
to cause a kernel oops.

Update instructions

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

Ubuntu 11.10:
linux-image-3.0.0-14-powerpc64-smp 3.0.0-14.23
linux-image-3.0.0-14-omap 3.0.0-14.23
linux-image-3.0.0-14-generic 3.0.0-14.23
linux-image-3.0.0-14-server 3.0.0-14.23
linux-image-3.0.0-14-powerpc-smp 3.0.0-14.23
linux-image-3.0.0-14-virtual 3.0.0-14.23
linux-image-3.0.0-14-powerpc 3.0.0-14.23
linux-image-3.0.0-14-generic-pae 3.0.0-14.23

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

CVE-2011-4081