Low severity · published Aug 10, 2018
CVE-2018-6556
The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files
3.3
CVSS
0.3%
EPSS
No
On KEV
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
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LX
LXC ·
2.0.9 before 2.0*; 3.0.0 before 3.0* · source: vendor, NVD
CP
Caas Platform · Suse
1.0; 2.0 · source: NVD
LE
Leap · Opensuse
15.0 · source: NVD
OC
Openstack Cloud · Suse
6 · source: NVD
SL
Suse Linux Enterprise Server · Suse
11; 11 · source: NVD
UL
Ubuntu Linux · Canonical
18.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-6556
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-6556
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html
Issue Tracking
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591
Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=988348