Check if URIPORT is 0

Author: wchen-r7

lib/msf/core/exploit/browser_autopwnv2.rb

@@ -662,7 +662,7 @@ def get_exploit_urls(cli, request)
         else
           host = Rex::Socket.source_address
         end
-        port = datastore['URIPORT'] || datastore['SRVPORT']
+        port = datastore['URIPORT'] == 0 ? datastore['SRVPORT'] : datastore['URIPORT']
         resource = mod.datastore['URIPATH']
         url = "#{proto}://#{host}:#{port}#{resource}"
         urls << url