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CVE-2013-5566

5.0 · MEDIUM

Cisco NX-OS 5.0 and earlier on MDS 9000 devices allows remote attackers to cause a denial of service (supervisor CPU consumption) via Authentication Header (AH) authentication in a Virtual Router R…

Published Nov 8, 2013ciscoCWE-119EPSS 1.90%

Overview

CVE-2013-5566 is a medium-severity vulnerability affecting cisco nx-os. It was published on November 8, 2013 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Cisco NX-OS 5.0 and earlier on MDS 9000 devices allows remote attackers to cause a denial of service (supervisor CPU consumption) via Authentication Header (AH) authentication in a Virtual Router Redundancy Protocol (VRRP) frame, aka Bug ID CSCte27874.

Remediation

Check the references section for vendor advisories and patches from cisco. Update nx-os 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
cisconx-os0Affected

References

Reftools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5566Reftools.cisco.com/security/center/viewAlert.x?alertId=31663Reftools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5566Reftools.cisco.com/security/center/viewAlert.x?alertId=31663

How CyberStrike helps

Frequently asked questions

What is CVE-2013-5566?

CVE-2013-5566 is a medium-severity vulnerability affecting cisco nx-os. It was published on November 8, 2013 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2013-5566?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-5566?

Check the references section for vendor advisories and patches from cisco. Update nx-os 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-2013-5566?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-5566 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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