Update model check

Author: cbrnrd

modules/exploits/linux/http/netgear_dnslookup_cmd_exec.rb

@@ -66,7 +66,8 @@ def check
       marker_two = "\""
       model = data[/#{marker_one}(.*?)#{marker_two}/m, 1]
       vprint_status("Router is a NETGEAR router (#{model})")
-      if model == 'DGN2200v1' || model == 'DGN2200v2' || model == 'DGN2200v3' || model == 'DGN2200v4'
+      model_numbers = ['DGN2200v1', 'DGN2200v2', 'DGN2200v3', 'DGN2200v4']
+      if model_numbers.include?(model) 
         print_good("Router may be vulnerable (NETGEAR #{model})")
         return CheckCode::Detected
       else