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CVE-2015-8551

6.0 · MEDIUM

The PCI backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allows local guest administrators to hit BUG conditions and cause a denial of…

Published Apr 13, 2016CWE-476EPSS 0.45%

Overview

CVE-2015-8551 is a medium-severity vulnerability. It was published on April 13, 2016 and has a CVSS 3.1 base score of 6.0 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.0, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The PCI backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allows local guest administrators to hit BUG conditions and cause a denial of service (NULL pointer dereference and host OS crash) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and a crafted sequence of XEN_PCI_OP_* operations, aka "Linux pciback missing sanity checks."

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Reflists.opensuse.org/opensuse-security-announce/2016-03/msg00094.htmlReflists.opensuse.org/opensuse-security-announce/2016-04/msg00045.htmlReflists.opensuse.org/opensuse-security-announce/2016-06/msg00059.htmlReflists.opensuse.org/opensuse-security-announce/2016-07/msg00005.htmlReflists.opensuse.org/opensuse-security-announce/2016-08/msg00000.htmlReflists.opensuse.org/opensuse-security-announce/2016-08/msg00044.htmlReflists.opensuse.org/opensuse-security-announce/2016-08/msg00055.htmlRefwww.debian.org/security/2016/dsa-3434Refwww.securityfocus.com/bid/79546Refwww.securitytracker.com/id/1034480

How CyberStrike helps

Frequently asked questions

What is CVE-2015-8551?

CVE-2015-8551 is a medium-severity vulnerability. It was published on April 13, 2016 and has a CVSS 3.1 base score of 6.0 (MEDIUM).

How severe is CVE-2015-8551?

This vulnerability has a CVSS 3.1 base score of 6.0, 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-2015-8551?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2015-8551?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-8551 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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