What’s Vulnerable › Vulnerabilities

CVE-2018-6556: The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files

Description

lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.

Affected products

How to fix

Upgrade to a fixed version: lxc 3.0.2. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2018-6556 or the next vulnerability affects your stack