Ubuntu Security Notice USN-2753-1
29th September, 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 version:
- Ubuntu 15.04:
-
lxc
1.1.2-0ubuntu3.2
- Ubuntu 14.04 LTS:
-
lxc
1.0.7-0ubuntu0.5
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.