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CVE-2012-3495

6.1 · MEDIUM

The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking…

Published Nov 23, 2012citrixCWE-20EPSS 0.44%

Overview

CVE-2012-3495 is a medium-severity vulnerability affecting citrix xenserver. It was published on November 23, 2012 and has a CVSS 2.0 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.

Remediation

Check the references section for vendor advisories and patches from citrix. Update xenserver 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
citrixxenserver0Affected

References

Reflists.opensuse.org/opensuse-security-announce/2012-09/msg00003.htmlReflists.opensuse.org/opensuse-security-announce/2012-09/msg00004.htmlReflists.opensuse.org/opensuse-security-announce/2012-09/msg00017.htmlReflists.opensuse.org/opensuse-security-announce/2012-11/msg00017.htmlReflists.opensuse.org/opensuse-security-announce/2012-11/msg00018.htmlReflists.xen.org/archives/html/xen-announce/2012-09/msg00001.htmlRefsecunia.com/advisories/51413Refsecunia.com/advisories/55082Refsecurity.gentoo.org/glsa/glsa-201309-24.xmlRefsupport.citrix.com/article/CTX134708

How CyberStrike helps

Frequently asked questions

What is CVE-2012-3495?

CVE-2012-3495 is a medium-severity vulnerability affecting citrix xenserver. It was published on November 23, 2012 and has a CVSS 2.0 base score of 6.1 (MEDIUM).

How severe is CVE-2012-3495?

This vulnerability has a CVSS 2.0 base score of 6.1, 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-2012-3495?

Check the references section for vendor advisories and patches from citrix. Update xenserver 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-2012-3495?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2012-3495 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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