Cisco IOS and NX-OS Software Locator/ID Separation Protocol Packet Denial of Service Vulnerability

A vulnerability in the Locator/ID Separation Protocol (LISP) of Cisco IOS Software running on the Cisco Catalyst 6500 and 6800 Series Switches and Cisco NX-OS Software running on the Cisco Nexus 7000 and Nexus 7700 Series Switches with an M1 Series Gigabit Ethernet Module could allow an unauthenticated, remote attacker to cause a reload of the vulnerable device.

The vulnerability is due to a lack of proper input validation when a malformed LISP packet header is received. An attacker could exploit this vulnerability by sending a malformed LISP packet on UDP port 4341. An exploit could allow the attacker to cause a denial of service (DoS) condition.

Cisco has released software updates that address this vulnerability.

This advisory is available at the following link:

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160323-lisp[“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160323-lisp”]

This advisory is part of the March 23, 2016, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes six Cisco Security Advisories that describe six vulnerabilities. All the vulnerabilities have a Security Impact Rating of “High.” For a complete list of advisories and links to them, see Cisco Event Response: Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication[“http://www.cisco.com/c/en/us/about/security-center/event-response/cisco-erp-march-2016.html”].