CVE-2018-6556
liblxc1: lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path
CVE-2018-6556 is fixed in 6 products on 1 platform, first by liblxc-common 3.0.1-0ubuntu1~18.04.2, released August 6, 2018. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
n/a
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0035
28th percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| liblxc-common · Ubuntu 18.04.6 LTS (bionic) | 3.0.1-0ubuntu1~18.04.2 | liblxc-common 3.0.1-0ubuntu1~18.04.2 | Aug 6, 2018 |
| liblxc1 · Ubuntu 18.04.6 LTS (bionic) | 3.0.1-0ubuntu1~18.04.2 | liblxc1 3.0.1-0ubuntu1~18.04.2 | Aug 6, 2018 |
| libpam-cgfs · Ubuntu 18.04.6 LTS (bionic) | 3.0.1-0ubuntu1~18.04.2 | libpam-cgfs 3.0.1-0ubuntu1~18.04.2 | Aug 6, 2018 |
| lxc · Ubuntu 18.04.6 LTS (bionic) | 3.0.1-0ubuntu1~18.04.2 | lxc 3.0.1-0ubuntu1~18.04.2 | Aug 6, 2018 |
| lxc-utils · Ubuntu 18.04.6 LTS (bionic) | 3.0.1-0ubuntu1~18.04.2 | lxc-utils 3.0.1-0ubuntu1~18.04.2 | Aug 6, 2018 |
| lxc1 · Ubuntu 18.04.6 LTS (bionic) | 3.0.1-0ubuntu1~18.04.2 | lxc1 3.0.1-0ubuntu1~18.04.2 | Aug 6, 2018 |