Vulnerability in Linuxcontainers Lxc
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (26.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Linuxcontainers Lxc
- Canonical Ubuntu Linux — versions 18.04
- openSUSE Leap — versions 15.0
- SUSE Caas Platform — versions 1.0, 2.0
- SUSE OpenStack Cloud — versions 6
- SUSE Linux Enterprise Server — versions 11
- Lxc — versions 2.0.9, 3.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- usn.ubuntu.com/usn/usn-3730-1 (vendor-advisory, Third Party Advisory)
- bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591 (Third Party Advisory, Issue Tracking)
- security.gentoo.org/glsa/201808-02 (vendor-advisory, Third Party Advisory)
- bugzilla.suse.com/show_bug.cgi (Patch, Issue Tracking)
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html (vendor-advisory)
Frequently asked questions
- What is CVE-2018-6556?
- CVE-2018-6556 is a low-severity vulnerability in Linuxcontainers Lxc, classified under CWE-417. CVSS score: 3.3/10. Published 2018-08-10.
- How severe is CVE-2018-6556?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2018-6556 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.