AST-2017-013: DOS Vulnerability in Asterisk chan_skinny

               Asterisk Project Security Advisory - AST-2017-013

          Product         Asterisk                                            
          Summary         DOS Vulnerability in Asterisk chan_skinny           
     Nature of Advisory   Denial of Service                                   
       Susceptibility     Remote Unauthenticated Sessions                     
          Severity        Moderate                                            
       Exploits Known     Yes                                                 
        Reported On       November 30, 2017                                   
        Reported By       Juan Sacco                                          
         Posted On        December 1, 2017                                    
      Last Updated On     December 1, 2017                                    
      Advisory Contact    gjoseph AT digium DOT com                           
          CVE Name        

    Description  If the chan_skinny (AKA SCCP protocol) channel driver is     
                 flooded with certain requests it can cause the asterisk      
                 process to use excessive amounts of virtual memory           
                 eventually causing asterisk to stop processing requests of   
                 any kind.                                                    

    Resolution  The chan_skinny driver has been updated to release memory     
                allocations in a correct manner thereby preventing any        
                possiblity of exhaustion.                                     

                               Affected Versions
                Product              Release Series  
         Asterisk Open Source             13.x       All Versions             
         Asterisk Open Source             14.x       All Versions             
         Asterisk Open Source             15.x       All Versions             
          Certified Asterisk             13.13       All Versions             

                                  Corrected In
                 Product                              Release                 
           Asterisk Open Source               13.18.3, 14.7.3, 15.1.3         
            Certified Asterisk                      13.13-cert8               

                                SVN URL                               Revision    Asterisk  
                                                                      13      Asterisk  
                                                                      14      Asterisk  
                                                                      15   Certified 


    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         
    November 30, 2017  George Joseph             Initial Revision             

               Asterisk Project Security Advisory - AST-2017-013
               Copyright © 2017 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in its
                           original, unaltered form.

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