[asterisk-dev] AST-2018-010: Remote crash vulnerability DNS SRV and NAPTR lookups

[Asterisk Security Team]

               Asterisk Project Security Advisory - AST-2018-010

         Product        Asterisk                                              
         Summary        Remote crash vulnerability DNS SRV and NAPTR lookups  
    Nature of Advisory  Denial Of Service                                     
      Susceptibility    Remote Unauthenticated Sessions                       
         Severity       Moderate                                              
      Exploits Known    No                                                    
       Reported On      October 23, 2018                                      
       Reported By      Jan Hoffmann                                          
        Posted On       
     Last Updated On    November 14, 2018                                     
     Advisory Contact   gjoseph AT digium DOT com                             
         CVE Name       

    Description  There is a buffer overflow vulnerability in dns_srv and      
                 dns_naptr functions of Asterisk that allows an attacker to   
                 crash Asterisk via a specially crafted DNS SRV or NAPTR      
                 response. The attacker’s request causes Asterisk to          
                 segfault and crash.                                          

        Resolution       Upgrade Asterisk to a fixed version.                 

                               Affected Versions
                Product              Release Series  
         Asterisk Open Source             15.x       All releases             
         Asterisk Open Source             16.x       All releases             

                                  Corrected In  
                     Product                              Release             
               Asterisk Open Source                        15.6.2             
               Asterisk Open Source                        16.0.1             

                                    Patches                        
                               SVN URL                              Revision  
   http://downloads.asterisk.org/pub/security/AST-2018-010-15.diff Asterisk   
                                                                   15         
   http://downloads.asterisk.org/pub/security/AST-2018-010-16.diff Asterisk   
                                                                   16         

       Links     https://issues.asterisk.org/jira/browse/ASTERISK-28127       

    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-2018-010.pdf and             
    http://downloads.digium.com/pub/security/AST-2018-010.html                

                                Revision History
          Date                  Editor                 Revisions Made         
    October 25, 2018   George Joseph             Initial revision             

               Asterisk Project Security Advisory - AST-2018-010
               Copyright © 2018 Digium, Inc. All Rights Reserved.
  Permission is hereby granted to distribute and publish this advisory in its
                           original, unaltered form.