[USN-1599-1] Linux kernel (OMAP4) vulnerability

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Ubuntu Security Notice USN-1599-1
October 09, 2012

linux-ti-omap4 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS

Summary:

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

Software Description:
- linux-ti-omap4: Linux kernel for OMAP4

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-3.2.0-1420-omap4 3.2.0-1420.27

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-1599-1
CVE-2012-3520

Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1420.27