[USN-2753-1] LXC vulnerability

[Tyler Hicks]

==========================================================================
Ubuntu Security Notice USN-2753-1
September 29, 2015

lxc vulnerability
==========================================================================

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

- Ubuntu 15.04
- Ubuntu 14.04 LTS

Summary:

LXC could be made to start containers without AppArmor confinement or access
the host filesystem.

Software Description:
- lxc: Linux Containers userspace tools

Details:

Roman Fiedler discovered a directory traversal flaw in lxc-start. A local
attacker with access to an LXC container could exploit this flaw to run
programs inside the container that are not confined by AppArmor or expose
unintended files in the host to the container.

Update instructions:

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

Ubuntu 15.04:
  lxc                             1.1.2-0ubuntu3.2

Ubuntu 14.04 LTS:
  lxc                             1.0.7-0ubuntu0.5

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-2753-1
  CVE-2015-1335

Package Information:
  https://launchpad.net/ubuntu/+source/lxc/1.1.2-0ubuntu3.2
  https://launchpad.net/ubuntu/+source/lxc/1.0.7-0ubuntu0.5

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