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Cisco Security Advisory - Cisco IOS Software Internet Key Exchange Memory Leak Vulnerability (cisco-sa-20130925-ike)
Cisco IOS Software Internet Key Exchange Memory Leak Vulnerability

Advisory ID: cisco-sa-20130925-ike

Revision 1.0

For Public Release 2013 September 25 16:00  UTC (GMT)
- ----------------------------------------------------------------------

Summary
=======

A vulnerability in the Internet Key Exchange (IKE) protocol of Cisco IOS Software and
Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a
memory leak that could lead to a device reload.

The vulnerability is due to incorrect handling of malformed IKE packets by the
affected software. An attacker could exploit this vulnerability by sending crafted
IKE packets to a device configured with features that leverage IKE version 1
(IKEv1).

Although IKEv1 is automatically enabled on a Cisco IOS Software and Cisco IOS XE
Software when IKEv1 or IKE version 2 (IKEv2) is configured, the vulnerability can be
triggered only by sending a malformed IKEv1 packet.

In specific conditions, normal IKEv1 packets can also cause an affected release of
Cisco IOS Software to leak memory.

Only IKEv1 is affected by this vulnerability.

An exploit could cause Cisco IOS Software not to release allocated memory, causing a
memory leak. A sustained attack may result in a device reload.

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-2013092
5-ike

Note: The September 25, 2013, Cisco IOS Software Security Advisory bundled
publication includes eight 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 September 2013 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_sep13.html




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