USN-2753-3: LXC regression
Publication date
5 October 2015
Overview
USN-2753-1 introduced a regression in LXC.
Releases
Packages
- lxc - Linux Containers userspace tools
Details
USN-2753-1 fixed a vulnerability in LXC. The update caused a regression
that prevented some containers from starting. This regression only
affected containers that had a path that contained a '/./' directory
specified as a bind mount target in their configuration file. This
update fixes the problem. We apologize for the inconvenience.
Original advisory 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.
USN-2753-1 fixed a vulnerability in LXC. The update caused a regression
that prevented some containers from starting. This regression only
affected containers that had a path that contained a '/./' directory
specified as a bind mount target in their configuration file. This
update fixes the problem. We apologize for the inconvenience.
Original advisory 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
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 14.04 LTS trusty | liblxc1 – 1.0.7-0ubuntu0.7 | ||
| lxc – 1.0.7-0ubuntu0.7 | |||
| lxc-dev – 1.0.7-0ubuntu0.7 | |||
| lxc-templates – 1.0.7-0ubuntu0.7 | |||
| lxc-tests – 1.0.7-0ubuntu0.7 | |||
| python3-lxc – 1.0.7-0ubuntu0.7 | |||
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