AST-2014-018: AMI permission escalation through DB dialplan function

           Asterisk Project Security Advisory - AST-2014-018

     Product        Asterisk                                              
     Summary        AMI permission escalation through DB dialplan         
                    function                                              
Nature of Advisory  Permission Escalation                                 
  Susceptibility    Remote Authenticated Sessions                         
     Severity       Minor                                                 
  Exploits Known    No                                                    
   Reported On      November 17, 2014                                     
   Reported By      Gareth Palmer                                         
    Posted On       20 November, 2014                                     
 Last Updated On    November 20, 2014                                     
 Advisory Contact   Kevin Harwell <kharwell AT digium DOT com>            
     CVE Name       Pending                                               

Description  The DB dialplan function when executed from an external      
             protocol (for instance AMI), could result in a privilege     
             escalation.                                                  

Resolution  Asterisk now inhibits the  DB function from being executed    
            from an external interface if the live_dangerously option is  
            set to no.                                                    

                           Affected Versions       
                     Product                       Release  
                                                   Series   
               Certified Asterisk                    1.8    All versions  
               Certified Asterisk                   11.6    All versions  
              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  

                              Corrected In
      Product                              Release                        
Asterisk Open Source           1.8.32.1,11.14.1, 12.7.1, 13.0.1           
 Certified Asterisk                1.8.28-cert3,11.6-cert8                

                                  Patches                          
                             SVN URL                               Revision  

http://downloads.asterisk.org/pub/security/AST-2014-018-1.8.28.diff Certified
Asterisk
1.8
http://downloads.asterisk.org/pub/security/AST-2014-018-11.6.diff Certified
Asterisk
11.6
http://downloads.asterisk.org/pub/security/AST-2014-018-1.8.diff Asterisk
1.8
http://downloads.asterisk.org/pub/security/AST-2014-018-11.diff Asterisk
11
http://downloads.asterisk.org/pub/security/AST-2014-018-12.diff Asterisk
12
http://downloads.asterisk.org/pub/security/AST-2014-018-13.diff Asterisk
13

Links  https://issues.asterisk.org/jira/browse/ASTERISK-24534             

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-2014-018.pdf and             
http://downloads.digium.com/pub/security/AST-2014-018.html                

                            Revision History
      Date            Editor                  Revisions Made              
November 18, 2014  Kevin Harwell  Initial advisory created                

           Asterisk Project Security Advisory - AST-2014-018
          Copyright (c) 2014 Digium, Inc. All Rights Reserved.

Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.