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USN-2753-1: LXC vulnerability

29 September 2015

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

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Releases

Packages

  • 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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 15.04
Ubuntu 14.04

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

References

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Further reading