Cisco Security Notice

Cisco Nexus 7000 Frame Forwarding Loop Denial of Service Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-1226
CVE ID: CVE-2013-1226
Release Date: 2013 April 25 20:12  UTC (GMT)
Last Updated: 2013 April 25 20:12  UTC (GMT)


Summary

A vulnerability in the Ethernet frame forwarding code of the Cisco Nexus 7000 Series Switch could allow an unauthenticated, adjacent attacker to cause a frame forwarding loop that that may saturate all interswitch links and affect all services on the switch, causing a network outage.

The vulnerability is due to mishandling of a specific type of non-standard Ethernet frames, which, once received, are replicated to all links. An attacker could exploit this vulnerability by sending a crafted, non-standard Ethernet frame.

Affected Products

ProductMore InformationCVSS
Cisco NX-OS SoftwareCSCug470986.1/5.5

What Is a Cisco Security Notice?

The Cisco Product Security Incident Response Team (PSIRT) publishes Cisco Security Notices to inform customers of low- to mid-level severity security issues involving Cisco products.

Customers who wish to upgrade to a software version that includes fixes for these issues should contact their normal support channels. Free software updates will not be provided for issues that are disclosed through a Cisco Security Notice.

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Customers Using Third-Party Support Organizations

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