[USN-2451-1] cgmanager vulnerability

Seth Arnold seth.arnold at canonical.com
Tue Jan 6 03:07:37 UTC 2015

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


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

Software Description:
- cgmanager: Central cgroup manager daemon


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.


Package Information:

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 473 bytes
Desc: Digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20150105/c1d9d751/attachment.sig>

More information about the ubuntu-security-announce mailing list