USN-3730-1: LXC vulnerability

6 August 2018

lxc vulnerability

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

  • Ubuntu 18.04 LTS

Summary

LXC would allow unintended access to files.

Software Description

  • lxc - Linux Containers userspace tools

Details

Matthias Gerstner discovered that LXC incorrectly handled the lxc-user-nic utility. A local attacker could possibly use this issue to open arbitrary files.

Update instructions

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

Ubuntu 18.04 LTS
lxc - 3.0.1-0ubuntu1~18.04.2

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