asterisk users - Apr 2007 - ASA-2007-011: Multiple problems in SIP channel parser handling response codes

>                Asterisk Project Security Advisory - ASA-2007-011
> 
>   
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>    |      Product       | Asterisk                                         
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>   
|--------------------+---------------------------------------------------|
>    |      Summary       | Multiple problems in SIP channel parser handling 
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>    |                    | response codes                                   
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>   
|--------------------+---------------------------------------------------|
>    | Nature of Advisory | Denial of Service                                
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>   
|--------------------+---------------------------------------------------|
>    |   Susceptibility   | Remote Unauthenticated Sessions                  
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>   
|--------------------+---------------------------------------------------|
>    |      Severity      | Critical                                         
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>   
|--------------------+---------------------------------------------------|
>    |   Exploits Known   | No                                               
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>   
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>    |    Reported On     | March 20, 2007                                   
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>   
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>    |    Reported By     | Mantis user ID 'qwerty1979'              
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>   
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>    |     Posted On      | April 24, 2007                                   
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>   
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>    |  Last Updated On   | April 24, 2007                                   
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>   
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>    |  Advisory Contact  | kpfleming@digium.com                             
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>    | Description | Multiple problems have been identified in the Asterisk  
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>    |             | SIP channel driver (chan_sip) when handling response    
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>    |             | packets from other SIP endpoints.                       
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>    |             |                                                         
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>    |             | If the response packets did not contain a valid response
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>    |             | code in the first line of the UDP packet, the Asterisk  
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>    |             | SIP channel driver would fail to parse the packet       
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>    |             | properly and would cause the Asterisk process to die    
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>    |             | with a segmentation fault. This results in all active   
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>    |             | calls and other sessions being lost.                    
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>    |             |                                                         
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>    |             | More details about these issues can be found at         
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>    |             | http://bugs.digium.com/view.php?id=9313.                
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> 
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>    | Resolution | All users are urged to upgrade to the appropriate version
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>    |            | of their Asterisk product listed in the 'Corrected
In'    |
>    |            | section below.                                           
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>   
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> 
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>    |                           Affected Versions                           
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>   
|------------------------------------------------------------------------|
>    |          Product          |   Release   |                             
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>    |                           |   Series    |                             
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>   
|---------------------------+-------------+------------------------------|
>    |   Asterisk Open Source    |    1.0.x    | has not been evaluated as   
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>    |                           |             | this release series is no   
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>    |                           |             | longer maintained           
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>   
|---------------------------+-------------+------------------------------|
>    |   Asterisk Open Source    |    1.2.x    | all releases prior to 1.2.18
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>   
|---------------------------+-------------+------------------------------|
>    |   Asterisk Open Source    |    1.4.x    | all releases prior to 1.4.3 
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>   
|---------------------------+-------------+------------------------------|
>    | Asterisk Business Edition |    A.x.x    | all releases                
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>   
|---------------------------+-------------+------------------------------|
>    | Asterisk Business Edition |    B.x.x    | all releases prior to and   
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>    |                           |             | including B.1.3.2           
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>   
|---------------------------+-------------+------------------------------|
>    |        AsteriskNOW        | pre-release | all releases prior to and   
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>    |                           |             | including Beta 5            
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>   
|---------------------------+-------------+------------------------------|
>    |    Asterisk Appliance     |    0.x.x    | all releases prior to 0.4.0 
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>    |       Developer Kit       |             |                             
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>   
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> 
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>    |                              Corrected In                             
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>   
|------------------------------------------------------------------------|
>    |      Product       |                      Release                     
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>   
|--------------------+---------------------------------------------------|
>    |   Asterisk Open    |         1.2.18 and 1.4.3, available from         
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>    |       Source       |    ftp://ftp.digium.com/pub/telephony/asterisk   
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>   
|--------------------+---------------------------------------------------|
>    | Asterisk Business  |   B.1.3.3, available from the Asterisk Business  
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>    |      Edition       |  Edition user portal on http://www.digium.com or 
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>    |                    |           via Digium Technical Support           
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>   
|--------------------+---------------------------------------------------|
>    |    AsteriskNOW     |            Beta 6, when available from           
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>    |                    | http://www.asterisknow.org, Beta 5 users can use 
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>    |                    |   use 'System Update' in the appliance
control    |
>    |                    |   panel to update their version of AsteriskNOW   
|
>   
|--------------------+---------------------------------------------------|
>    | Asterisk Appliance |               0.4.0, available from              
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>    |   Developer Kit    |      ftp://ftp.digium.com/pub/telephony/aadk     
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>   
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> 
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>    |       Links       | http://bugs.digium.com/view.php?id=9313           
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>   
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> 
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>    | Asterisk Project Security Advisories are posted at                    
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>    | http://www.asterisk.org/security.                                     
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>    |                                                                       
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>    | This document may be superseded by later versions; if so, the latest  
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>    | version will be posted at                                             
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>    | http://www.asterisk.org/files/ASA-2007-011.pdf.                       
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>   
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> 
>                Asterisk Project Security Advisory - ASA-2007-011
>               Copyright (c) 2007 Digium, Inc. All Rights Reserved.
>   Permission is hereby granted to distribute and publish this advisory in
its
>                            original, unaltered form.