The common name for the language used primarily for scripting in web browsers. It is not related to the Java language. Standardized as ECMAScript, its dialects/implementations include JavaScript and JScript.

learn more… | top users | synonyms

3
votes
1answer
294 views

How can I use certificates to secure my webservices? What is available to javascript?

I have a few web services that are accessed over public wifi connections and I think it would be a good idea to issue certificates to encrypt data, prevent MITM, and invalid impersonation (beyond what ...
3
votes
2answers
236 views

How to defend against invalid UTF7/8 that hides a <script> tag?

I'm scanning HTML before it reaches a browser, and I've just heard about a type of exploit that uses invalid UTF7 or UTF8 sequences to embed an otherwise invisible script tag, which is used to execute ...
3
votes
1answer
306 views

how secure is javascript based oauth2.0

Javascript based oauth exposes the client id of the application and it trusts only on the domain requesting the access token. The domain name can be forged with a dns hijack(or a virus affecting ...
3
votes
1answer
703 views

How to secure my REST implementation for an ember.js app

I've been searching and searching for what seems days and have not come up with any definitive answer on a solution to my problem. To explain without going into terrible detail I am building a store, ...
3
votes
0answers
67 views

Is the use of JavaScript for cryptography ever appropriate in the browser? [duplicate]

Possible Duplicate: How secure is aSSL (javascript)? Does it effectively mimic SSL? After some searching around, I realized we don't have an easily visible canonical question about this on ...
3
votes
1answer
700 views

Is 'Forge' Javascript crypto library secure? [closed]

I need a client-side crypto library. I've seen https://github.com/digitalbazaar/forge linked many times on stackexchange. Forge seems to be the most complete and well-documented crypto library for JS. ...
2
votes
5answers
241 views

Is converting `<` to `&lt;` sufficient to prevent execution of JavaScript from arbitrary HTML?

This is kind of a bar-bet question. An acquaintance of mine has made the claim that, given an arbitrary glob of HTML, it can be completely prevented from executing JavaScript if, before slapping it ...
2
votes
5answers
1k views

Is it secure to use jQuery on the server-side for user input validation?

I'm thinking about using jQuery on the server-side (node.js) to validate user input (filter tags, remove every attributes except href, rel, target & style, modify css rules which are applied ...
2
votes
3answers
2k views

Javascript containing a long hexadecimal string and eval: is this suspicious?

At the bottom of the index.php file for a simple “contact us” form, I found the following (some whitespace and newlines added): try {if(window.document)--document.getElementById('12')} catch(qq) ...
2
votes
2answers
9k views

Best Approach for removing XSS Vulnerability

I have been developing a Webobjects application, and I found that my application is vulnerable to XSS through URL, but not when malicious input like <script>alert("hi")</script> is input ...
2
votes
4answers
2k views

Without using SSL, what's the most secure way to make an AJAX request to a PHP page?

It was suggested over at stackoverflow that I try my question here. This is it verbatim: So, it's impossible to do AJAX requests securely without using SSL. I get it. You can either view-source the ...
2
votes
3answers
6k views

What typically is the expiration date of a session cookie?

I need to create a session cookie using JavaScript (for more info see question). I'm wondering what should the expiry date be? I'm guessing it's the browsing session, so if I don't set an expiration ...
2
votes
2answers
97 views

is it sufficient to convert '(single-quote) to ` &#039; `

Is it sufficient to convert ' to &#039; , > converted to &gt; and < converted to &lt; to avoid xss A bit of context: the payload would be going through the URL and landing in a ...
2
votes
1answer
152 views

Should a space in a password count as a symbol when checking for complexity?

There is no doubt in my mind that spaces should be allowed in passwords. I see some websites disallow spaces, symbols in passwords and even enforce minimum length which seems t otally nonsensical to ...
2
votes
4answers
280 views

Why aren't we all compromised on the internet?

Well, I've been thinking about this for a while now. Within the last decade, we've used various ways to make our websites look dynamic and live. For example, in JavaScript, it's quite easy to send ...
2
votes
2answers
495 views

DOM XSS attack failing in Firefox

I am trying to perform DOM XSS attack to exploit a vulnerability of localhost webpage. I am able to perform the attack successfully on IE-11 and Chrome. But Firefox is preventing me to perform the ...
2
votes
4answers
837 views

Are malicious scripts in batch files detected by antiviruses?

we have many scripts in shared folders in our IT Department. Are malicious scripts in batch files detected by antiviruses?
2
votes
2answers
792 views

Is it possible to take down a site using javascript in the URL bar?

If a site is written poorly enough, is it possible to take it down or severely mess with it using only javascript in the URL bar?
2
votes
1answer
157 views

How does this website prevent directing away from it

I'm using the latest version of Firefox with Ghostery and Adblock plus installed. This website somehow prevents navigation away from it. How does it do this and how can it be protected against? I ...
2
votes
3answers
145 views

XSS prevention by black-listing

I have a reflected XSS vulnerability in my Web application. I have decided to take the black-list approach instead of the popular white-list approach. My question is can there exist a malicious ...
2
votes
3answers
229 views

hiding javascript in image

I have read a post in thehackernews and searched the net to find how it worked. How can anyone add javascript in an image such that when the image is displayed it can run a script. Can this be done ...
2
votes
2answers
414 views

Need help deciphering malicious JS code

was hoping someone could give me a hand with deciphering this obfuscated Javascript added to a webpage that I own. As the code is quite large I will just link to pastebin posts but I can add them to ...
2
votes
2answers
343 views

Exploiting flash XSS holes

I have a URL to a flash file. Sample :- http://abc.mydomain.com/Findme.swf Now, there is a parameter called xmlpath as :- http://abc.mydomain.com/Findme.swf?xmlPath=something. Is it not that ...
2
votes
2answers
410 views

Can clients execute my python CGI at will?

I have a site where the main database is interacted with via python scripts located in public_html\cgi-bin\. To run commands, various JavaScript scripts, located in \public_html\scripts\, use jQuery ...
2
votes
3answers
3k views

Authentication between multiple systems/platforms within the same web application context

Consider the following scenario: Web application is using two separate systems (they can share data/state through DB). First one is used for processing standard web stuff like http requests/responses, ...
2
votes
2answers
7k views

XSS cookie stealing without redirecting to another page

I'm practicing in VM following the OWASP guide. I know that is possible to steal the cookie by redirecting to "False" page etc. but I would like to steal the cookie without redirecting on another ...
2
votes
2answers
200 views

Identify code being run on website

I do not normally deal with internet security problems but this one has got me interested. The issue is with a specific site, lets say example.com, and how it it visited. If the address is typed ...
2
votes
1answer
131 views

US Department of Labor Watering Hole Attack

So I read this article about how the US Department of Labor's website was compromised and users were redirect to a site that installed malware: ...
2
votes
3answers
377 views

sanitizing likes/unlikes in application?

I've got a function in my app where users can click on a "thumbs up" image and a like is recorded in the database; all that's recorded is the user's ID and the ID of the post that the user liked. I ...
2
votes
2answers
93 views

High level design for secure web application

I'm looking for some advise on designing a secure web app for storing passwords. Why reinvent the wheel? Because I don't trust a 3rd party with all of my passwords. Here are my thoughts: There are ...
2
votes
2answers
452 views

XSS in HTML meta tag

There is a web application which contains a search function. When I search for aaaaaaaaxss I get this: <meta property="the:property" content="100 Results for aaaaaaaaxss (Page 1)" /> It strips ...
2
votes
1answer
106 views

Chrome inline JavaScript string interpreatation

If you have an HTML file that contains the following code : <!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> </head> ...
2
votes
2answers
146 views

Is it safer to store the XSRF value inside your JavaScript?

To protect yourself against XSRF, you need to have a separate token on a page. See: Coding Horror: Preventing CSRF and XSRF Attacks, by Jeff Atwood As the posting suggests, its best to have those ...
2
votes
1answer
340 views

Can a Javascript - WebGL proof of work system prevent website spam?

Is it a good idea to come up with a Javascript-based Proof of Work system to reduce spam on forums, and other websites? This idea would be similar to HashCash, but the computation would be based on ...
2
votes
1answer
2k views

javascript:alert(“test”); command does not work

Hello! As I have done before and also have read in many web sites, that just simply writing: javascript:alert(document.cookie); should work on any web page. But now, I was not able to execute it. I ...
2
votes
1answer
165 views

XSS - history stealing

I am little confused about this matter. By simply writing a JavaScript code we can go through our browser history and identify visited links. It is fine. But how an attacker use this to identify a ...
2
votes
3answers
1k views

Why are scripts injected through innerHTML not executed whilst onerror and other on<event> attributes on elements are? - Google XSS Challenge 2

SPOILER ALERT : Do not continue if you do not want to be spoiled I am currently doing the Google XSS Challenge Level 2 . I am injecting XSS code that is inserted into the document using ...
2
votes
2answers
505 views

Hacked HTML page - what's in the comment following the obfuscated code?

Chrome just warned me about malicious content when visiting a site - so I visited it. The source code is like the following: <html> <head> <link href="images/DPT2.ico" title="Dynamic ...
2
votes
2answers
325 views

Is this password generator safe?

128-bit entropy is required http://nxtra.org/nxt-client/js/passphrasegenerator.js With all new browsers (Chrome, Firefox, IE 11) it uses crypto.getRandomValues which should be safe, but with IE 10 ...
2
votes
1answer
2k views

Are these both cross frame scripting attacks?

I've received a recent security review of a website which mentioned it had a cross frame scripting vulnerability. In short, it mentioned that a malicious site could load the page up in an iframe, ...
2
votes
1answer
151 views

Sandboxing user input html

I want to render user uploaded HTML (consisting of possibly many files with images, custom css, custom js, all uploaded in a zip file) for preview purpose. The user that submits the html will be the ...
2
votes
1answer
118 views

Unusual ownership-ID using localStorage; any possible issues?

I'm working on a small side project in PHP. I may yet include some sort of actual username/password registration down the line, but for now, for ease of attracting attention, my goal is to allow for ...
2
votes
1answer
330 views

Are GET, POST and windows.location vulnerable to XSS in a Wordpress theme?

I created a Wordpress theme for my client. He told me that he scanned my theme with a vulnerability scanner, and that it has security issues with the GET and windows.location methods. Is this really ...
2
votes
1answer
402 views

How to hide victim pop-up in clickjacking?

I am testing a web application for click-jacking vulnerability. The attack works fine for single clicks, however i am trying to delete a file and the hidden frame (victim) throws a pop-up ...
2
votes
1answer
2k views

How to prevent the following clickjacking attack?

The Security attribute was implemented to prevent XSS attacks in iFrames by disabling any JS implemented in the iFrame source, therefore indeed eliminating XSS attacks, but also disabling any security ...
2
votes
1answer
349 views

Is DWR (Direct Web Remoting) Secure?

Is DWR considered secure, or what may be required to secure Direct Web Remoting? Are there better options for hardened asynchronous communication?
2
votes
2answers
924 views

Removing Google Analytics cookie string from URL - security hole?

On our site, we use google analytics and we have to put the GA cookie in the URL since we have a two letter domain and IE imposes some cookie limitations on those. This means that when going between ...
2
votes
1answer
715 views

What browsers support encryption or decryption using local certificates, or smartcard readers?

I am working on a cloud-based solution and I would like to encrypt / decrypt the data locally using either a SmartCard or local Machine certificate. I'm hoping to do this in Javascript, but may ...
2
votes
1answer
63 views

How is the QSS tag used as payload in an XSS attack?

I have received a report from a client that lists XSS vulnerabilities. The report shows reflected XSS vulnerabilities. In each vulnerability, the payload reflected is a single, unclosed <qss> ...
2
votes
1answer
37 views

Spoofing of Server Sent Events

In the spec for Server Sent Events, it says Authors should check the origin attribute to ensure that messages are only accepted from domains that they expect to receive messages from. Otherwise, ...