Cisco Security Advisory: Cisco IOS Software Internet Key Exchange Version 2 Denial of Service Vulnerability

[Cisco Systems Product Security Incident Response Team <psirt@xxxxxxxxx>]

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Cisco IOS Software Internet Key Exchange Version 2 Denial of Service 
Vulnerability

Advisory ID: cisco-sa-20140326-ikev2

Revision 1.0

For Public Release 2014 March 26 16:00  UTC (GMT)

Summary
=======

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco 
IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote 
attacker to cause a reload of the affected device that would lead to a denial 
of service (DoS) condition.

The vulnerability is due to how an affected device processes certain malformed 
IKEv2 packets. An attacker could exploit this vulnerability by sending 
malformed IKEv2 packets to an affected device to be processed. An exploit could 
allow the attacker to cause a reload of the affected device that would lead to 
a DoS condition.

Although IKEv2 is automatically enabled on Cisco IOS Software and Cisco IOS XE 
Software devices when the Internet Security Association and Key Management 
Protocol (ISAKMP) is enabled, the vulnerability can be triggered only by 
sending a malformed IKEv2 packet.

Only IKEv2 packets can trigger this vulnerability.

Cisco has released free software updates that address this vulnerability.
There are no workarounds to mitigate this vulnerability.

This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140326-ikev2

Note: The March 26, 2014, Cisco IOS Software Security Advisory bundled 
publication includes six Cisco Security Advisories. All advisories address 
vulnerabilities in Cisco IOS Software. Each Cisco IOS Software Security 
Advisory lists the Cisco IOS Software releases that correct the vulnerability 
or vulnerabilities detailed in the advisory as well as the Cisco IOS Software 
releases that correct all Cisco IOS Software vulnerabilities in the March 2014 
bundled publication.

Individual publication links are in Cisco Event Response: Semiannual Cisco IOS 
Software Security Advisory Bundled Publication at the following link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar14.html
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