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Ubuntu: Security update for the Linux kernel

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
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