Vulnerability CVE-2018-6556
Published: 2018-08-10

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.

Type:

CWE-417

 (Channel and Path Errors)

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
SUSE -> Caas platform 
SUSE -> Openstack cloud 
SUSE -> Suse linux enterprise server 
Opensuse -> LEAP 
Linuxcontainers -> LXC 
Canonical -> Ubuntu linux 

 References:
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
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