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Date: Mon, 17 Oct 2011 12:44:24 -0500
From: "Asterisk Security Team" <>
Subject: AST-2011-012: Remote crash vulnerability in SIP channel driver

               Asterisk Project Security Advisory - AST-2011-012

          Product         Asterisk                                            
          Summary         Remote crash vulnerability in SIP channel driver    
     Nature of Advisory   Remote crash                                        
       Susceptibility     Remote authenticated sessions                       
          Severity        Critical                                            
       Exploits Known     No                                                  
        Reported On       October 4, 2011                                     
        Reported By       Ehsan Foroughi                                      
         Posted On        October 17, 2011                                    
      Last Updated On     October 17, 2011                                    
      Advisory Contact    Terry Wilson <>                   
          CVE Name        CVE-2011-4063                                       

    Description  A remote authenticated user can cause a crash with a         
                 malformed request due to an unitialized variable.            

    Resolution  Ensure variables are initialized in all cases when parsing    
                the request.                                                  

                               Affected Versions
           Product         Release Series  
    Asterisk Open Source       1.8.x       All versions                       
    Asterisk Open Source        10.x       All versions (currently in beta)   

                                  Corrected In
                  Product                              Release                
            Asterisk Open Source       , 10.0.0-rc1          

                             Download URL                           Revision 1.8   10        


    Asterisk Project Security Advisories are posted at                                                             
    This document may be superseded by later versions; if so, the latest      
    version will be posted at                                             and                        

                                Revision History
           Date                 Editor                 Revisions Made         

               Asterisk Project Security Advisory - AST-2011-012
              Copyright (c) 2011 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in its
                           original, unaltered form.

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