CVE-2018-6556 Information

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.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Reference

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

3.3