[USN-2451-1] cgmanager vulnerability

[Seth Arnold]

==========================================================================
Ubuntu Security Notice USN-2451-1
January 06, 2015

cgmanager vulnerability
==========================================================================

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

- Ubuntu 14.10
- Ubuntu 14.04 LTS

Summary:

cgmanager could be made to expose sensitive information or devices to
containers running on the system.

Software Description:
- cgmanager: Central cgroup manager daemon

Details:

Serge Hallyn discovered that cgmanager did not consistently enforce
proper nesting when modifying cgroup properties. A local attacker in a
privileged container could use this to set cgroup values for all cgroups.

Update instructions:

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

Ubuntu 14.10:
  cgmanager                       0.32-4ubuntu1.1

Ubuntu 14.04 LTS:
  cgmanager                       0.24-0ubuntu7.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-2451-1
  CVE-2014-1425

Package Information:
  https://launchpad.net/ubuntu/+source/cgmanager/0.32-4ubuntu1.1
  https://launchpad.net/ubuntu/+source/cgmanager/0.24-0ubuntu7.1

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