=========================================================================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:
https://ubuntu.com/security/notices/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