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Cisco Security Advisory: Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability
From: Cisco Systems Product Security Incident Response Team <psirt () cisco com>
Date: Wed, 6 Nov 2013 11:11:36 -0500

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Cisco Security Advisory: Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability

Advisory ID: cisco-sa-20131106-sip

Revision 1.0

For Public Release 2013 November 6 16:00  UTC (GMT)

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Summary
=======

A vulnerability exists in the Session Initiation Protocol (SIP) implementation in Cisco IOS Software that could allow 
an unauthenticated, remote attacker to cause a reload of an affected device or cause memory leaks that may result in 
system instabilities. To exploit this vulnerability, affected devices must be configured to process SIP messages. 
Limited Cisco IOS Software releases are affected.

Cisco has released free software updates that address this vulnerability.

There are no workarounds for devices that must run SIP; however, mitigations are available to limit exposure to the 
vulnerability.

This advisory is available at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131106-sip

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