USN-1826-1: Linux kernel vulnerability

Ubuntu Security Notice USN-1826-1

15th May, 2013

linux vulnerability

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

  • Ubuntu 12.10

Summary

The system could be made to run programs as an administrator.

Software description

  • linux - Linux kernel

Details

An flaw was discovered in the Linux kernel's perf_events interface. A local
user could exploit this flaw to escalate privileges on the system.

Update instructions

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

Ubuntu 12.10:
linux-image-3.5.0-30-omap 3.5.0-30.51
linux-image-3.5.0-30-generic 3.5.0-30.51
linux-image-3.5.0-30-highbank 3.5.0-30.51
linux-image-3.5.0-30-powerpc-smp 3.5.0-30.51
linux-image-3.5.0-30-powerpc64-smp 3.5.0-30.51

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-2013-2094