Cisco Security Notice

Cisco NX-OS Software BGP Regex Vulnerability

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-1121
CVE ID: CVE-2013-1121
Release Date: 2013 September 17 13:05  UTC (GMT)
Last Updated: 2013 September 17 13:05  UTC (GMT)
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Summary

A vulnerability in the Border Gateway Protocol (BGP) code of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the affected device to reload.

The vulnerability is due to an issue with the regex engine used when processing complex regular expressions. An attacker could exploit this vulnerability by injecting specific autonomous system (AS) path sets. If the affected device has a complex regular expression applied to the inbound routes, the vulnerability may be triggered. An exploit could allow the attacker to trigger Cisco NX-OS Software to restart.

Affected Products

ProductMore InformationCVSS
Cisco NX-OS SoftwareCSCuf495545.4/4.5

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.

For additional information about Cisco PSIRT publications, see the Cisco Security Vulnerability Policy at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html

Customers Using Third-Party Support Organizations

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