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CVE-2013-6456

5.8 · MEDIUM

The LXC driver (lxc/lxc_driver.c) in libvirt 1.0.1 through 1.2.1 allows local users to (1) delete arbitrary host devices via the virDomainDeviceDettach API and a symlink attack on /dev in the conta…

Published Apr 15, 2014redhatCWE-59EPSS 0.58%

Overview

CVE-2013-6456 is a medium-severity vulnerability affecting redhat libvirt. It was published on April 15, 2014 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The LXC driver (lxc/lxc_driver.c) in libvirt 1.0.1 through 1.2.1 allows local users to (1) delete arbitrary host devices via the virDomainDeviceDettach API and a symlink attack on /dev in the container; (2) create arbitrary nodes (mknod) via the virDomainDeviceAttach API and a symlink attack on /dev in the container; and cause a denial of service (shutdown or reboot host OS) via the (3) virDomainShutdown or (4) virDomainReboot API and a symlink attack on /dev/initctl in the container, related to "paths under /proc/$PID/root" and the virInitctlSetRunLevel function.

Remediation

Check the references section for vendor advisories and patches from redhat. Update libvirt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Reflibvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=5fc590ad9f4Reflibvirt.org/news.htmlReflists.fedoraproject.org/pipermail/package-announce/2014-February/129199.htmlReflists.opensuse.org/opensuse-updates/2014-05/msg00004.htmlRefsecunia.com/advisories/56187Refsecunia.com/advisories/56215Refsecunia.com/advisories/60895Refsecurity.gentoo.org/glsa/glsa-201412-04.xmlRefsecurity.libvirt.org/2013/0018.htmlRefwww.securityfocus.com/bid/65743

How CyberStrike helps

Frequently asked questions

What is CVE-2013-6456?

CVE-2013-6456 is a medium-severity vulnerability affecting redhat libvirt. It was published on April 15, 2014 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

How severe is CVE-2013-6456?

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2013-6456?

Check the references section for vendor advisories and patches from redhat. Update libvirt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2013-6456?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-6456 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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