USN-3375-1: LXC vulnerability

2 August 2017

lxc vulnerability

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

  • Ubuntu 14.04 LTS

Summary

LXC would allow unintended access.

Software Description

  • lxc - Linux Containers userspace tools

Details

It was discovered that LXC incorrectly handled the TIOCSTI ioctl. An attacker could possibly use this issue to escape LXC containers.

Update instructions

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

Ubuntu 14.04 LTS
lxc - 1.0.10-0ubuntu1.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to restart LXC containers to make all the necessary changes.

References