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CVE-2013-6400

6.8 · MEDIUM

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries…

Published Dec 13, 2013xenCWE-264EPSS 0.66%

Overview

CVE-2013-6400 is a medium-severity vulnerability affecting xen xen. It was published on December 13, 2013 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service (host crash) or gain privileges via unspecified vectors.

Remediation

Check the references section for vendor advisories and patches from xen. Update xen 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

Reflists.fedoraproject.org/pipermail/package-announce/2013-December/125081.htmlReflists.fedoraproject.org/pipermail/package-announce/2013-December/125111.htmlReflists.opensuse.org/opensuse-security-announce/2014-03/msg00011.htmlReflists.xen.org/archives/html/xen-announce/2013-12/msg00002.htmlRefsecunia.com/advisories/55932Refsecurity.gentoo.org/glsa/glsa-201407-03.xmlRefwww.openwall.com/lists/oss-security/2013/12/10/7Refwww.securitytracker.com/id/1029468Reflists.fedoraproject.org/pipermail/package-announce/2013-December/125081.htmlReflists.fedoraproject.org/pipermail/package-announce/2013-December/125111.html

How CyberStrike helps

Frequently asked questions

What is CVE-2013-6400?

CVE-2013-6400 is a medium-severity vulnerability affecting xen xen. It was published on December 13, 2013 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

How severe is CVE-2013-6400?

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-6400?

Check the references section for vendor advisories and patches from xen. Update xen 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-2013-6400?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-6400 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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