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Cisco Security Advisory: Cisco IOS Software SSL VPN Denial of Service Vulnerability
From: Cisco Systems Product Security Incident Response Team <psirt () cisco com>
Date: Wed, 26 Mar 2014 12:10:00 -0400

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Cisco IOS Software SSL VPN Denial of Service Vulnerability

Advisory ID: cisco-sa-20140326-ios-sslvpn

Revision 1.0

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

Summary
=======

A vulnerability in the Secure Sockets Layer (SSL) VPN subsystem of Cisco IOS Software could allow an unauthenticated, 
remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to a failure to process certain types of HTTP requests. To exploit the vulnerability, an 
attacker could submit crafted requests designed to consume memory to an affected device. An exploit could allow the 
attacker to consume and fragment memory on the affected device. This may cause reduced performance, a failure of 
certain processes, or a restart of the affected device.

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-ios-sslvpn

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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