[asterisk-dev] AST-2016-001: BEAST vulnerability in HTTP server

[Asterisk Security Team]

               Asterisk Project Security Advisory - AST-2016-001

         Product        Asterisk                                              
         Summary        BEAST vulnerability in HTTP server                    
    Nature of Advisory  Unauthorized data disclosure due to                   
                        man-in-the-middle attack                              
      Susceptibility    Remote unauthenticated sessions                       
         Severity       Minor                                                 
      Exploits Known    Yes                                                   
       Reported On      04/15/15                                              
       Reported By      Alex A. Welzl                                         
        Posted On       02/03/16                                              
     Last Updated On    February 3, 2016                                      
     Advisory Contact   Joshua Colp <jcolp AT digium DOT com>                 
         CVE Name       Pending                                               

    Description  The Asterisk HTTP server currently has a default             
                 configuration which allows the BEAST vulnerability to be     
                 exploited if the TLS functionality is enabled. This can      
                 allow a man-in-the-middle attack to decrypt data passing     
                 through it.                                                  

    Resolution  Additional configuration options have been added to Asterisk  
                which allow configuration of the HTTP server to not be        
                susceptible to the BEAST vulnerability. These include         
                options to confirm the permitted ciphers, to control what     
                TLS protocols are allowed, and to use server cipher           
                preference order instead of client preference order. The      
                default configuration has also been changed for the HTTP      
                server to use a configuration which is not susceptible to     
                the BEAST vulnerability.                                      

                               Affected Versions       
                         Product                       Release  
                                                       Series   
                  Asterisk Open Source                  1.8.x   All Versions  
                  Asterisk Open Source                  11.x    All Versions  
                  Asterisk Open Source                  12.x    All Versions  
                  Asterisk Open Source                  13.x    All Versions  
                   Certified Asterisk                  1.8.28   All Versions  
                   Certified Asterisk                   11.6    All Versions  
                   Certified Asterisk                   13.1    All Versions  

                                  Corrected In
          Product                              Release                        
    Asterisk Open Source                   11.21.1, 13.7.1                    
     Certified Asterisk                11.6-cert12, 13.1-cert3                

                                      Patches                          
                                 SVN URL                               Revision  
   http://downloads.asterisk.org/pub/security/AST-2016-001-1.8.28.diff Certified 
                                                                       Asterisk  
                                                                       1.8.28    
   http://downloads.asterisk.org/pub/security/AST-2016-001-11.6.diff   Certified 
                                                                       Asterisk  
                                                                       11.6      
   http://downloads.asterisk.org/pub/security/AST-2016-001-13.1.diff   Certified 
                                                                       Asterisk  
                                                                       13.1      
   http://downloads.asterisk.org/pub/security/AST-2016-001-11.diff     Asterisk  
                                                                       11        
   http://downloads.asterisk.org/pub/security/AST-2016-001-12.diff     Asterisk  
                                                                       12        
   http://downloads.asterisk.org/pub/security/AST-2016-001-13.diff     Asterisk  
                                                                       13        

    Links  https://issues.asterisk.org/jira/browse/ASTERISK-24972             

    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-2016-001.pdf and             
    http://downloads.digium.com/pub/security/AST-2016-001.html                

                                Revision History
         Date         Editor                   Revisions Made                 
    3 August, 2015  Joshua Colp  Initial creation of document                 

               Asterisk Project Security Advisory - AST-2016-001
              Copyright (c) 2015 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in its
                           original, unaltered form.