added check function

modules/exploits/linux/misc/ueb9_bpserverd.rb

@@ -51,6 +51,19 @@ class MetasploitModule < Msf::Exploit::Remote
     deregister_options('CMDSTAGER::DECODER', 'CMDSTAGER::FLAVOR')
   end
 
+  def check
+    s1 = connect(global = false)
+    buf1  = s1.get_once(-1).to_s
+    #parse out the bpd port returned
+    bpd_port = buf1[-8..-3].to_i
+    
+    #check if it's a valid port number (1-65534)
+    if bpd_port && bpd_port >= 1 && bpd_port <= 65535
+      Exploit::CheckCode::Detected
+    else
+      Exploit::CheckCode::Safe
+    end
+  end  
 
   def execute_command(cmd, opts = {})