[USN-3151-4] Linux kernel (Raspberry Pi 2) vulnerability

[Steve Beattie]

==========================================================================
Ubuntu Security Notice USN-3151-4
December 05, 2016

linux-raspi2 vulnerability
==========================================================================

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

- Ubuntu 16.04 LTS

Summary:

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

Software Description:
- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

Philip Pettersson discovered a race condition in the af_packet
implementation in the Linux kernel. A local unprivileged attacker could use
this to cause a denial of service (system crash) or run arbitrary code with
administrative privileges.

Update instructions:

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1034-raspi2   4.4.0-1034.41
  linux-image-raspi2              4.4.0.1034.33

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
  http://www.ubuntu.com/usn/usn-3151-4
  http://www.ubuntu.com/usn/usn-3151-1
  CVE-2016-8655

Package Information:
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1034.41

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