CVE-2018-6556

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.

• CWE-417

• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html
• https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591Issue Tracking, Third Party Advisory
• https://bugzilla.suse.com/show_bug.cgi?id=988348Issue Tracking, Patch
• https://security.gentoo.org/glsa/201808-02Third Party Advisory
• https://usn.ubuntu.com/usn/usn-3730-1Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html
• https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591Issue Tracking, Third Party Advisory
• https://bugzilla.suse.com/show_bug.cgi?id=988348Issue Tracking, Patch
• https://security.gentoo.org/glsa/201808-02Third Party Advisory
• https://usn.ubuntu.com/usn/usn-3730-1Third Party Advisory

Published

Aug 10, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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