Cisco Cisco IOS Software Release 12.4(2)XB6

CSCsg70474

Multiple voice-related vulnerabilities are identified in Cisco IOS software, one of which is also 
shared with Cisco Unified Communications Manager. These vulnerabilities pertain to the following 
protocols or features:

Session Initiation Protocol (SIP) 

Media Gateway Control Protocol (MGCP) 

Signaling protocols H.323, H.254 

Real-time Transport Protocol (RTP) 

Facsimile reception 

Cisco has made free software available to address these vulnerabilities for affected customers. Fixed 
Cisco IOS software listed in the Software Versions and Fixes section contains fixes for all 
vulnerabilities mentioned in this advisory.

There are no workarounds available to mitigate the effects of any of the vulnerabilities apart from 
disabling the protocol or feature itself. 

This advisory is posted at 

CSCsi60004

Multiple voice-related vulnerabilities are identified in Cisco IOS software, one of which is also 
shared with Cisco Unified Communications Manager. These vulnerabilities pertain to the following 
protocols or features:

Session Initiation Protocol (SIP) 

Media Gateway Control Protocol (MGCP) 

Signaling protocols H.323, H.254 

Real-time Transport Protocol (RTP) 

Facsimile reception 

Cisco has made free software available to address these vulnerabilities for affected customers. Fixed 
Cisco IOS software listed in the Software Versions and Fixes section contains fixes for all 
vulnerabilities mentioned in this advisory.

There are no workarounds available to mitigate the effects of any of the vulnerabilities apart from 
disabling the protocol or feature itself. 

This advisory is posted at 

CSCsi80749

Multiple voice-related vulnerabilities are identified in Cisco IOS software, one of which is also 
shared with Cisco Unified Communications Manager. These vulnerabilities pertain to the following 
protocols or features:

Session Initiation Protocol (SIP)