CVE-2018-6556: The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files
First published: Fri Aug 10 2018(Updated: )
Last updated 24 July 2024
Credit: security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical Ubuntu Linux | =18.04 | |
| Linuxcontainers Lxc | >=2.0.0<=2.0.9 | |
| Linuxcontainers Lxc | >=3.0.0<3.0.2 | |
| SUSE CaaS Platform | =1.0 | |
| SUSE CaaS Platform | =2.0 | |
| SUSE OpenStack Cloud | =6 | |
| SUSE SUSE Linux Enterprise Server | =11-sp3 | |
| SUSE SUSE Linux Enterprise Server | =11-sp4 | |
| openSUSE Leap | =15.0 | |
| debian/lxc | 1:4.0.6-2+deb11u2 1:5.0.2-1+deb12u2 1:6.0.1-1 |
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Reference Links
- 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
- https://launchpad.net/bugs/cve/CVE-2018-6556
- https://github.com/lxc/lxc/commit/f96f5f3c1341e73ee51c8b49bef4ba571c562d8c
- https://github.com/lxc/lxc/commit/5eb45428b312e978fb9e294dde16efb14dd9fa4d
- https://security-tracker.debian.org/tracker/CVE-2018-6556
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6556
- https://nvd.nist.gov/vuln/detail/CVE-2018-6556
- https://ubuntu.com/security/CVE-2018-6556
Frequently Asked Questions
What is CVE-2018-6556?
CVE-2018-6556 is a vulnerability in lxc-user-nic where an unprivileged user can open a user provided path, potentially allowing them to check for the existence of a path they wouldn't otherwise be able to reach or trigger side effects.
What is the severity of CVE-2018-6556?
The severity of CVE-2018-6556 is low with a CVSS score of 3.3.
What software is affected by CVE-2018-6556?
The affected software includes lxc versions 3.0.1-0ubuntu1~18.04.2, 1:3.1.0+really3.0.3-8, 1:3.1.0+really3.0.3-8+deb10u1, 1:4.0.6-2+deb11u2, 1:5.0.2-1+deb12u1, and 1:5.0.3-1.
How do I fix CVE-2018-6556?
To fix CVE-2018-6556, update lxc to version 3.0.1-0ubuntu1~18.04.2 or apply the available patches depending on your distribution.
Where can I find more information about CVE-2018-6556?
You can find more information about CVE-2018-6556 at the following references: [link1], [link2], [link3].
- agent/author
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- collector/security-tracker-debian
- source/Debian
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- source/NVD
- agent/softwarecombine
- agent/tags
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- collector/usn-cve
- source/Ubuntu
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/18.04
- vendor/linuxcontainers
- canonical/linuxcontainers lxc
- version/linuxcontainers lxc/2.0.0
- version/linuxcontainers lxc/2.0.9
- version/linuxcontainers lxc/3.0.0
- vendor/suse
- canonical/suse caas platform
- version/suse caas platform/1.0
- version/suse caas platform/2.0
- canonical/suse openstack cloud
- version/suse openstack cloud/6
- canonical/suse suse linux enterprise server
- version/suse suse linux enterprise server/11-sp3
- version/suse suse linux enterprise server/11-sp4
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.0
- package-manager/debian