An application that is accessed over a network such as the Internet or an intranet using a browser.

learn more… | top users | synonyms

3
votes
1answer
1k views

Salt usage for Spring security?

I use the Spring security for Java web applications and I have written an authentication provider which is working without salt and now I want to either add salt or alternatively use the built-in ...
4
votes
1answer
236 views

How is Cross Site Flashing performed?

I read about cross site flashing in the OWASP testing guide. I know the difference between XSS and XSF. But what I am looking for is how attackers perform a XSF attack. How is it possible since there ...
3
votes
1answer
819 views

Are there modules to harden Symfony 2 sessions?

We're looking at building a new app on top of Symfony 2, but security is our top priority. After digging around a bit, it seems that there are a number of built-in options for Session management (eg ...
1
vote
2answers
246 views

How to implement password reset functionality without becoming susceptible to cross-domain referer leakage?

I have typically implemented password reset functionality by sending a link that included something like this: http://example.com/pwreset?id=userId&resetToken=superSecretResetToken On my pwreset ...
13
votes
2answers
2k views

Best practice in web application security authentication to avoid bruteforce attack

I want to cover the possible cases of attacking. My application already has captcha and two-factor authentication, but how can I avoid a tiny attack without annoying my users? The possible cases that ...
4
votes
3answers
179 views

Does PHP have a XSS API?

ASP.NET has a cross site scripting API by default, however does PHP have a cross site scripting prevention API?
-4
votes
2answers
256 views

What is the best exploit of XSS within 100 characters? [closed]

I found a vulnerable php script on my website. The script allows an user input (textarea), which is not encoded by htmlspecialchars(). Therefore it is possible to add html and javascript code. The ...
3
votes
1answer
142 views

XSS: terminology [closed]

Where does the name XSS come from? Why "cross-site"? Also, the book "The Web Application Hacker's Handbook" says that the name XSS is a misnomer when talking about "stored XSS" or second-order XSS ...
11
votes
1answer
728 views

Webapp2 security

I am coding a REST web application that runs on Google App Engine, it authenticates API requests to privileged data using sessions by cookies provided by webapp2_extras.auth and ...
2
votes
1answer
106 views

Best practice in securing a web server and an offsite worker

Suppose I'm hosting a web server and a separate box offsite that crunches data. The web server interacts with the worker using the worker's API over port 2888. What would be the design of a secure ...
4
votes
2answers
329 views

Placeholders for cshtml — ASP.NET

I'm learning Application Security, and tutorials such as www.asp.net discuss updating databases with placeholders, instead of directly using user input @{ var title = ""; var genre = ""; ...
3
votes
4answers
991 views

Is it ever safe to skip server-side validations?

I am working on a web app with a sign up form like below. The validations are all done client side using http://formvalidator.net/. I am well aware that client-side validations can be bypassed, but I ...
1
vote
0answers
46 views

Best way to authenticate for Funding balance with API call [closed]

I have an API call where a user adds to their balance when funds are low. The actual payment is done via Braintree, but I need to allow the user to make that call via their API. What would be a good ...
3
votes
2answers
427 views

How to protect my API endpoints

I have an API written in nodejs and I have a frontendapp written in angularjs. I want my API to be called only through my frontendapp and not from any other source. e.g. I have an endpoint called ...
2
votes
1answer
253 views

Automated tools to test Struts OGNL security vulnerabilities

I'm looking for a way to find Struts2 OGNL vulnerabilities (specifically http://www.cvedetails.com/cve/CVE-2013-4316/ and http://www.cvedetails.com/cve/CVE-2013-2251/. ) I know that attackers ...
-1
votes
1answer
52 views

Where do I start securing my system? [closed]

I am working for a company with perhaps the least security possible. We have servers, databases, web applications, and websites that are all unsecured. There only exists one account: root, which ...
27
votes
2answers
3k views

Do simple Linux servers really need a non-root user for security reasons?

Playing devil's advocate, Let's assume I purchase a Linux server from a hosting provider. I am given a password for the root user and am told I may login using SSH. The only purpose this server has ...
2
votes
3answers
110 views

Moving Services to the Cloud

Our company has made the decision to switch from an internally hosted Jabber-based chat system to a more modern, cloud-based chat solution. Hosting our own chat servers and software presented the ...
2
votes
1answer
172 views

Is preventing XSS/HTML Injection really this simple?

A colleague suggested to me just to prevent letter characters from occurring immediately after an opening angle bracket as a way to protect against XSS and HTML injection. Obviously, this doesn't ...
1
vote
1answer
166 views

What is the difference between OWASP PHPSEC and PHP-ESAPI?

On the surface it looks like both libraries are designed to preform the same functionality with similar "drop-in" capabilities. Are there differences that I need to take into account when making a ...
29
votes
5answers
5k views

Could mint.com be more secure, and if so, how?

After reading a bit about mint.com on the money stack exchange, I wanted to give it a try. But frankly, it scares me a little bit. The site has a bunch of links explaining how they're so secure. I ...
4
votes
4answers
1k views

Why is this response splitting attack not working?

I'm working through OWASP's "WebGoat" (version 5.4) vulnerable web application, but I'm getting stuck on one of the earliest lessons which is to do with HTTP response splitting. I've looked in all ...
2
votes
3answers
175 views

How to prevent popping up a login dialogue using a malicious hotlinked image and HTTP Basic Auth header?

While using Firefox to browse my forums, I noticed that a malicious user posted an image (via hotlinking, not by uploading to my server) with the extension .png which complies with the forum rules ...
6
votes
5answers
6k views

Obfuscating JavaScript code

Some Flash developers are afraid of JavaScript. Their point of view: Stealing JS source code is effortless, one would just 'view source' and copy it. Yes, you can decompile Flash bytecode, however it ...
0
votes
2answers
182 views

Stateless session cookie and logout

I have implemented stateless session cookie, something along the lines of this article: Demystifying Web Authentication (Stateless Session Cookies) The cookie contain an expiry time within the ...
1
vote
1answer
247 views

Checklist for securing JBoss

Is there a security checklist for auditing JBoss configuration files ? CIS and DISA provides security checklist only for Tomcat and Apache server. Is there any other ressources ?
0
votes
0answers
39 views

Preventing “existing accounts” data leak during account creation [duplicate]

It is common practice for web apps to prevent mining of existing user accounts for logins (with "username and/or password does not exist" rather than "user does not exist"), and for password resets ...
4
votes
4answers
1k views

What XSS attacks doesn't “Reflective XSS Protection” defeat?

Its been quite a while since I have played with cross site scripting vulnerabilities but today I came across a website today that was crying out to be tested for a basic XSS vulnerability. So ...
3
votes
3answers
454 views

How is the same origin policy causing my PoC to fail when I don't need to read return data?

I'm performing an authorized vulnerability analysis on a custom web service and have discovered a CSRF vulnerability. Due to there not being form tokens coupled with the service not checking for the ...
2
votes
2answers
350 views

Security concerns with iframes

Are there any security concerns I should be aware of, if I want to give users the ability to embed iframes(for things like Youtube videos) in their generated content on my site. The user generated ...
8
votes
1answer
350 views

I've discovered a vulnerability which can reveal personal information for multiple websites. How to go about it?

It's not so much a technical vulnerability, but rather a sloppy security practice by a web design consultancy. They use a CMS which they've augmented with an admin login. As it happens, the admin ...
4
votes
3answers
250 views

Reflected XSS through cookie value?

I have always looked at reflected XSS as an attack that would take place through a URL. So, for example, you would have a URL like below: ...
1
vote
1answer
82 views

Is having a GUID in a https url secure enough? [duplicate]

Is having a GUID in a https url secure enough? Are there any security risks of using this way of authenticating users? https://mywebsite.com/......?Guid=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Also what ...
2
votes
2answers
296 views

Web Application Vulnerability Scan- False Positives-Recognizing and Eliminating

Web Application Vulnerability and Potential False Positives As a Penetration Tester the application vulnerability scan is a major part of any penetration testing methodology. In the Application ...
-1
votes
1answer
90 views
0
votes
1answer
65 views

Securing access tokens?

Preface: I have no experience with securing applications whatsoever. I'm building a web app that uses Google Plus authentication to sign users in. My initial thought is to save the access token that ...
4
votes
1answer
164 views

How to store a group password for multi-user server-client web-application?

In a web application, accessed by browser via https, users need to be able to access data stored on a server in a MySQL database. Data has to be encrypted for several groups of users, where one group ...
0
votes
2answers
135 views

How did an attacker spoof (or add to) this myspace's login form?

In the attack detailed here, I see that a hacker has actually added a malicious post link. What I do not understand is how the attacker added it to the actual myspace.comdomain. Obviously this is an ...
1
vote
1answer
476 views

Sharing RSA Public Key for decrypting JWT amongst Load Balanced servers

I'm trying to implement a cookie-less authentication mechanism for a web API that is stateless on the server (does not store session tokens) and can be load balanced across several servers. I have ...
1
vote
3answers
177 views

Will checking the CSRF token on the header and the form's hidden be enough?

From what I read here, CSRF tokens from the cookie header cannot be read because of the same-origin policy. Is comparing the CSRF token on the cookie header with the form's hidden element be ...
1
vote
1answer
187 views

Is XSS prevention only on the frontend enough for JSON services? [duplicate]

We have an application with a form where user can enter a comment. The form is submitted using AJAX. Values are read also through AJAX and returned by the backend as JSON, and then parsed by ...
1
vote
1answer
89 views

What are the risks of protecting an API with one key only (without secret)?

I understand that a lot of APIs are protected using a (possibly public) API Key, to identify who is making the request, and a secret to hmac the parameters and determine if the client is actually who ...
6
votes
4answers
5k views

Can Central Authentication Service (CAS) do authorization?

I have a few web applications that I'm trying to tie in via CAS, but I'm a little confused about the authorization, which I read CAS isn't supposed to do. Yet, I see something like groups, but don't ...
3
votes
1answer
57 views

Enabling Unsigned ActiveX

A third-party wants to provide a web app which they say only works if we enable unsigned ActiveX (unfortunately users are required to use IE). I understand what 'signing' is, as well as the basic ...
-1
votes
1answer
103 views

How strong exactly is a 3gbps booter?

I heard some people talking about how they had a 3 gigabyte per second drddosser. That sounds all fine and dandy, but what can that actually do? Could it take down a website? To what extent?
2
votes
1answer
209 views

How secure are PHP sessions?

Should i worry about securing PHP sessions for my users? How do hackers steal the sessions? The information users of my site can view is not at all sensitive and if viewed or modified by a hacker ...
3
votes
3answers
498 views

Where are the user credentials stored when remember password is selected?

Provided a user has chosen the remember me option while logged in last time into a web application,how does the web application server identifies the user next time when he logs in? The credentials ...
1
vote
1answer
224 views

'Ghost' access to a php file on a web server

I'm developing a personal project and one part of the project is a php website, hosted at hostinger as a free plan, that allow clients to ping to it and stores the WAN IP and the NAT IP of them. ...
5
votes
3answers
1k views

Can CSS file contain malware? [duplicate]

I know that javascript files can contain malware. However, I am not so sure about CSS files. They only affect how the page is displayed, right? I know that css files can be used for clickjacking but I ...
2
votes
1answer
2k views

Calling JavaScript functions from within a Style tag XSS

I've identified an XSS in a client's application where they've failed to properly sanitize a variable. The application, however, is written in ASP.NET 2.x and they have request validation turned on. ...