[Full-disclosure] Cisco Security Advisory: Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability

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

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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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