Fix struts_default_action_mapper payload request delay

MS-1609

Author: wchen-r7

modules/exploits/multi/http/struts_default_action_mapper.rb

@@ -74,6 +74,7 @@ def initialize(info = {})
       Opt::RPORT(8080),
       OptString.new('TARGETURI', [true, 'Action URI', '/struts2-blank/example/HelloWorld.action']),
       OptInt.new('HTTP_DELAY', [true, 'Time that the HTTP Server will wait for the payload request', 60]),
+      OptInt.new('PAYLOAD_REQUEST_DELAY', [true, 'Time to wait for the payload request', 5]),
       # It isn't OptPath becuase it's a *remote* path
       OptString.new("WritableDir", [ true, "A directory where we can write files (only on Linux targets)", "/tmp" ])
     ], self.class)
@@ -359,6 +360,8 @@ def wait_payload
         fail_with(Failure::Unknown, "#{rhost}:#{rport} - Target didn't request request the ELF payload -- Maybe it cant connect back to us?")
       end
     end
+
+    sleep(datastore['PAYLOAD_REQUEST_DELAY'])
   end
 
   def build_hta