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[USN-2872-3] Linux kernel (Raspberry Pi 2) vulnerability

Posted on 19 January 2016
Ubuntu Security

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==========================================================================
Ubuntu Security Notice USN-2872-3
January 19, 2016

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

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

- Ubuntu 15.10

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:

Yevgeny Pats discovered that the session keyring implementation in the
Linux kernel did not properly reference count when joining an existing
session keyring. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code with
administrative privileges.

Update instructions:

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

Ubuntu 15.10:
linux-image-4.2.0-1020-raspi2 4.2.0-1020.27

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.
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-2872-3
http://www.ubuntu.com/usn/usn-2872-1
CVE-2016-0728

Package Information:
https://launchpad.net/ubuntu/+source/linux-raspi2/4.2.0-1020.27

 

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