[asterisk-security] AST-2017-003: Crash in PJSIP multi-part body parser

[Asterisk Security Team]

               Asterisk Project Security Advisory - AST-2017-003

         Product        Asterisk                                              
         Summary        Crash in PJSIP multi-part body parser                 
    Nature of Advisory  Remote Crash                                          
      Susceptibility    Remote Unauthenticated Sessions                       
         Severity       Critical                                              
      Exploits Known    No                                                    
       Reported On      13 April, 2017                                        
       Reported By      Sandro Gauci                                          
        Posted On       
     Last Updated On    April 13, 2017                                        
     Advisory Contact   Mark Michelson <mark DOT michelson AT digium DOT      
                        com>                                                  
         CVE Name       

    Description  The multi-part body parser in PJSIP contains a logical       
                 error that can make certain multi-part body parts attempt    
                 to read memory from outside the allowed boundaries. A        
                 specially-crafted packet can trigger these invalid reads     
                 and potentially induce a crash.                              
                                                                              
                 The issue is within the PJSIP project and not in Asterisk.   
                 Therefore, the problem can be fixed without upgrading        
                 Asterisk. However, we will be releasing a new version of     
                 Asterisk where the bundled version of PJSIP has been         
                 updated to have the bug patched.                             
                                                                              
                 If you are using Asterisk with chan_sip, this issue does     
                 not affect you.                                              

    Resolution  We have submitted the error report to the PJProject           
                maintainers and have coordinated a release...........         

                               Affected Versions       
                         Product                       Release  
                                                       Series   
                  Asterisk Open Source                  11.x    Unaffected    
                  Asterisk Open Source                  13.x    All versions  
                  Asterisk Open Source                  14.x    All versions  
                   Certified Asterisk                   13.13   All versions  

                                  Corrected In               
                            Product                              Release      
                     Asterisk Open Source                    13.15.1, 14.4.1  
                      Certified Asterisk                       13.13-cert4    

                                    Patches
                 SVN URL                              Revision                

    Links  https://issues.asterisk.org/jira/browse/ASTERISK-26939             

    Asterisk Project Security Advisories are posted at                        
    http://www.asterisk.org/security                                          
                                                                              
    This document may be superseded by later versions; if so, the latest      
    version will be posted at                                                 
    http://downloads.digium.com/pub/security/AST-2017-003.pdf and             
    http://downloads.digium.com/pub/security/AST-2017-003.html                

                                Revision History
         Date           Editor                   Revisions Made               
    13 April, 2017  Mark Michelson  Initial advisory created                  

               Asterisk Project Security Advisory - AST-2017-003
              Copyright (c) 2017 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in its
                           original, unaltered form.