Vulnerability 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 Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Linux | 18.04 |
| Linuxcontainers | Lxc | >= 2.0.0, <= 2.0.9 |
| Suse | Caas Platform | 1.0 |
| Suse | Openstack Cloud | 6 |
| Suse | Suse Linux Enterprise Server | 11 |
| Opensuse | Leap | 15.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591Issue TrackingThird Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=988348Issue TrackingPatch
- 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 ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591Issue TrackingThird Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=988348Issue TrackingPatch
- https://security.gentoo.org/glsa/201808-02Third Party Advisory
FAQ
What is CVE-2018-6556?
CVE-2018-6556 is a vulnerability with a CVSS score of 3.3 (LOW). 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...
How severe is CVE-2018-6556?
CVE-2018-6556 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-6556?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Ubuntu Linux, Linuxcontainers Lxc, Suse Caas Platform, Suse Openstack Cloud, Suse Suse Linux Enterprise Server.