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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2018-18308 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.
Ubuntu USN Ubuntu USN USN-3730-1 LXC vulnerability
Fixes

Solution

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Workaround

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cve-icon MITRE

Status: PUBLISHED

Assigner: canonical

Published:

Updated: 2024-09-17T03:38:26.856Z

Reserved: 2018-02-02T00:00:00

Link: CVE-2018-6556

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-08-10T15:29:01.297

Modified: 2024-11-21T04:10:53.970

Link: CVE-2018-6556

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses