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CVE-2018-6556 lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path

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 and versions

Product Affected versions Fixed in
LXC 3.0 3.0.0 → latest No fix stated
LXC 2.0 2.0.9 → latest No fix stated
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