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CVE-2013-4368

1.9 · LOW

The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests…

Published Oct 17, 2013xenCWE-200EPSS 0.37%

Overview

CVE-2013-4368 is a low-severity vulnerability affecting xen xen. It was published on October 17, 2013 and has a CVSS 2.0 base score of 1.9 (LOW).

This vulnerability has a CVSS 2.0 base score of 1.9, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The outs instruction emulation in Xen 3.1.x, 4.2.x, 4.3.x, and earlier, when using FS: or GS: segment override, uses an uninitialized variable as a segment base, which allows local 64-bit PV guests to obtain sensitive information (hypervisor stack content) via unspecified vectors related to stale data in a segment register.

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
xenxen0Affected

References

Reflists.opensuse.org/opensuse-security-announce/2014-03/msg00015.htmlReflists.opensuse.org/opensuse-security-announce/2014-03/msg00021.htmlReflists.opensuse.org/opensuse-security-announce/2014-04/msg00000.htmlReflists.opensuse.org/opensuse-updates/2013-11/msg00009.htmlRefrhn.redhat.com/errata/RHSA-2013-1449.htmlRefsecurity.gentoo.org/glsa/glsa-201407-03.xmlRefwww.debian.org/security/2014/dsa-3006Refwww.openwall.com/lists/oss-security/2013/10/10/10Refexchange.xforce.ibmcloud.com/vulnerabilities/87799Reflists.opensuse.org/opensuse-security-announce/2014-03/msg00015.html

How CyberStrike helps

Frequently asked questions

What is CVE-2013-4368?

CVE-2013-4368 is a low-severity vulnerability affecting xen xen. It was published on October 17, 2013 and has a CVSS 2.0 base score of 1.9 (LOW).

How severe is CVE-2013-4368?

This vulnerability has a CVSS 2.0 base score of 1.9, rated LOW. 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-2013-4368?

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-2013-4368?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-4368 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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