Management of semi-permanent interactive information interchange between two or more communicating devices, or between a computer and user

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1answer
197 views

Ideal time for cookies to expire?

I get that websites that contain confidential personal information (e.g. banking system) have short sessions and expiration time for cookies for obviously reason. But what are the causes for sites, ...
5
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2answers
249 views

Securely store session data in cookies

I'm trying to create a stateless application server architecture and I would like to store session data in cookies. All pages using the session would be served over HTTPS. I was planning on using ...
5
votes
2answers
1k views

Is HTML5 sessionStorage secure for temporarily storing a cryptographic key?

Assume I am building a local web application (e.g. browser extension) in HTML5 to encrypt a database locally. Access to the database is controlled by a password and a cryptographic master key is ...
5
votes
2answers
274 views

Does the ability for a user to choose the value of a session id cookie constitute a security flaw?

In the context of a web application, a user connects to this application and a session id cookie is set to authenticate the user for next requests. As the cookie is actually present before submitting ...
5
votes
1answer
8k views

Is windows 7 vulnerable to null session?

My lecturer told me that Windows 7 is not vulnerable to null session but did not explain why. What is the preventive measure that windows 7 did to protect against from it? The recommend fixes for ...
5
votes
2answers
1k views

How long should a session absolute timeout be?

OWASP Session Management Cheat Sheet (https://www.owasp.org/index.php/Session_Management_Cheat_Sheet) recommends to implement an absolute session timeout (in addition to idle session timeout). It ...
5
votes
4answers
469 views

Why do we trust session info over the wire but not an OAuth access token?

I've been spending a lot of time looking into building an API that needs to be accessible by a single page JavaScript application and how to make it as secure as possible. A lot of what I'm reading ...
5
votes
1answer
857 views

A Secure Cookie Protocol

As title says I'm trying to implement a secure cookie protocol HMAC(username|expiration name|data|session key, sk) It seams that session key is not constant during whole application session ...
5
votes
1answer
2k views

Is this admin area secure enough? V2

This is a response to my previous question, Is this admin area secure enough?. There were some very helpful answers there, for which I am very grateful. So I went back to the drawing board and here ...
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2answers
10k views

Best way to securely set a session cookie on another domain

We currently have 2 sites http://www.foo.co.uk and https://secure.foo.com. The www site does not have an SSL certificate and is on a different domain. We have a login button on http://www.foo.co.uk ...
5
votes
1answer
191 views

What's the risk in putting semantically meaningful data in an HTTP session identifier?

I'm currently looking at performance optimization and am considering a way of speeding up cookie based session handling. There are advantages to having a session identifier in place when there is no ...
5
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3answers
2k views

prevent session hijacking in PHP

I wrote the log In/log Out scripts of my web page and when the user logs in I store in the $_SESSION variable the user agent. Now each time a page is loaded I check if the user is logged in or not and ...
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4answers
6k views

Is it correct to use form field(hidden) for storing Session Token

Is it correct to use form field(hidden) for storing Session Token instead of using Cookies? What is the security risk associated with it?
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3answers
546 views

Is this admin area secure enough?

EDIT: Please view the revised question instead The admin area has special access to the database (modifying orders, etc). To help explain, I drew a diagram, so here is my process: Notes: I ...
4
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2answers
3k views

Are PHP Sessions based on cookies or a cookie-IP pair?

I have a PHP website and my question is: If someone manages to steal my users' cookies via an XSS attack, is it enough for him to be identified as the user? Or does his IP also have to be the same as ...
4
votes
2answers
222 views

In which OSI layer does session hijacking occur?

In which layer of the OSI model does session hijacking occur? I have performed some research on this, and found that the answer is the transport layer. But is the transport layer not the place ...
4
votes
3answers
2k views

How do I protect myself against 'hole 196'?

I came across this question a while ago and read about hole 196. Is there something I can install on my laptop to protect it against WPA2 Hole196? Software (such as Snort or DecaffeintID) can ...
4
votes
4answers
1k views

Is this non-cookie based session scheme horribly vulnerable to some attack?

I am working on a large web application that runs entirely within a single web-page. For various reasons we do not want to use cookies in this web application, at all, but we need to keep track of ...
4
votes
3answers
2k views

Altering a $_SESSION variable in PHP via XSS?

Not sure if what I'm saying makes sense... but is it possible for me to alter a $_SESSION variable from outside the target PHP script? One of our scripts uses a $_SESSION variable and I'm not sure if ...
4
votes
2answers
2k views

How long should a browser session last?

I have two online accounts from different banks, one bank expires my session faster than the other, it's quite annoying. I was wondering how long (or short) should a session be for it to be ...
4
votes
3answers
1k views

Secure login system - using sessions?

I'm looking for a secure way to let users login on my website. Currently, I've always used a session system, like this: <?php session_start(); if (validPass() || isset($_SESSION['userId'])) { ...
4
votes
3answers
1k views

Session fixation attack

Given the following conditions, Session ID does not change upon login Session ID travels in form of HTTP cookie There is no cross site scripting/redirection vulnerability on the login page is it ...
4
votes
2answers
719 views

Attack vectors in POSTing variables from one php script to the next?

I have an application which is structured in the following way for its signup page. After this signup, the user is directly granted access into the system - there is no email verification (as intended)...
4
votes
3answers
2k views

Clearing/changing session id on logout

While reading through the newes OWASP ASVS standard (still beta) I have found a requirement V2.6 saying Verify that the session id is changed or cleared on logout. I do not see a clear point ...
4
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1answer
2k views

Signing session cookies

The Play Framework for Scala has support for signed session cookies. In the application configuration file is an "application secret" that is set as a secure random number when the application source ...
4
votes
2answers
2k views

Windows Authentication and Session Ids

After a penetration test made upon an intranet application I'm developing, in ASP.NET MVC, one of the concerns raised was that the application supports concurrent user sessions and it is recommended ...
4
votes
1answer
3k views

MITM and replay attacks prevention

I have a client (a mobile app) and a server, the app connects to the server via SSL. The server uses a self-signed certificate, and the client has a file (I'm not entirely sure what, something to do ...
4
votes
1answer
294 views

Two generals' agreement

I am trying to figure an agreement protocol on an unreliable channel. Basically two parties (A and B) have to agree to do something, so it's the two generals' problem. Since there is no bullet-proof ...
4
votes
2answers
89 views

Is allowing users to sign out of all other sessions good or bad?

I'm not really sure if this feature is a good security idea, but would it be good to allow a user to sign out of all other sessions? Or would this be a bad idea, because I see a good amount of pros, ...
4
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1answer
667 views

Protect session id without SSL - Accepted answer on Stack Overflow seems wrong?

I'm learning more about security and in my search also using Google Search I found the following question and answer on Stack Overflow: http://stackoverflow.com/questions/5459682/how-to-protect-...
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2answers
644 views

Any real world examples of GPS location data being used with authentication?

Are there any examples of how GPS coordinate (or any location data really) can be used to detect suspicious locations or validate well known locations? Specifically Highlighting new or unusual ...
4
votes
3answers
300 views

CSRF expiring before form submitted

I have a very long web form that could take hours for people to complete. The problem with this is when people take too long the CSRF token expires before they're done and when they hit submit they ...
4
votes
3answers
1k views

Deciding whether user has left the site without logging out or has simply left the site open for notifications without actually doing any work?

I am developing my site using server side sessions using redis as backend for saving the session. Now the issue which is bothering me is of user leaving the website without logging out. I mean user ...
4
votes
2answers
271 views

What factors increase the probability of duplicating a GUID?

It's been argued that a GUID doesn't do a good job of being a one time security token , and it makes sense because GUIDs aren't random. In my scenario: suppose a given company is using GUIDs as a ...
4
votes
1answer
7k views

Web app with iframe and user - how to deal with session?

We have application which will be in iframe. Partner sites can use our application - put iframe in their sites. Partner site has users with money, who will use our application in iframe to buy items. ...
4
votes
2answers
142 views

How much data should I store on a user's computer about their login info?

I'm currently saving a user's "login" information (not their raw password, of course!). Every device/browser gets its own secure ID from the server, all well and good. However, should I verify more ...
4
votes
2answers
394 views

What's a good time period before refreshing CSRF token of the user session?

I am using a form token to prevent CSRF attacks. Those tokens are stored and tied to a user's session. Now I want to refresh the token only every N minutes or hours so that the user's don't experience ...
4
votes
1answer
2k views

CakePHP Set-Cookie Response Header

I am familiar with the cakePHP cookie and session settings but I am unsure as to why (when analyzing through the Burp Proxy Suite I am finding 2 separate Set-Cookie responses: Set-Cookie: DropZone=...
4
votes
1answer
235 views

Security of rails user access/permissions plugins

I was wondering if anyone knows what the most secure user access plugin for Rails is, and if any of them prevent session fixation?
4
votes
1answer
382 views

Session Identification Hashing - How to make it more Secure and Robust

I wrote a PHP class which handles Session and store them in DB instead of normal Files in the server, you can find it on My Session Handler Class In that post a user by name @AnotherGuy has raised ...
4
votes
1answer
115 views

How does LDAP keep an authenticated session

I feel like I'm missing something, because I'm not finding an answer Let's have a pretend scenario. I connect to an LDAP server I issues a BIND command and successfully log in (I think the sever ...
4
votes
1answer
337 views

Session Management for Private Key Passphrases in a Web Application

Use Case I would like to encrypt data in a database for a Web Application. The following requirements exist: Decryption should only be possible when a user provides a passphrase Encryption should ...
4
votes
2answers
270 views

What type of information should be shown to an end user for a logon session summary?

Google, Yahoo, Facebook and several banks have a session summary screen that lists a variety of information, but they aren't consistent in what is offered to the end user. e.g. Facebook offers a ...
4
votes
1answer
147 views

PHP Session Vulnerability

I'm trying to solve a challenge on a CTF, with PHP sessions. The goal is to make check.php echo $_PASSWORD. I do not have access to the files themselves, and therefore I cannot edit them. My ...
4
votes
1answer
1k views

Session fixation in Java

In the process of developing a vulnerable jsp/servlet based application I made an attempt to introduce the session fixation vulnerability. Referring to the documentation I came up with the following ...
3
votes
2answers
2k views

Is my current method of handling session cookies insecure?

I'm writing a multi-tenant application where accounts are scoped by subdomains. This adds considerable complexity and I'm starting to worry about security. Each user can have several accounts. For ...
3
votes
3answers
253 views

Letting users pick up where they left off…without logging in (is this bad form?)

I have a Grails app I'm working on that allows users to fill out a fairly lengthy application form. One of the requirements I've been given is to NOT require users to log in or create any sort of ...
3
votes
3answers
754 views

Can I safely use an encrypted URL parameter for the session id?

I'm planning to send a user's session ID as a URL parameter which will be AES encrypted. I don't think my app has any link sharing problems. Is this idea feasible? Is it safe?
3
votes
4answers
261 views

Securing opensource web application

I have an open source website. I need to add an admin section to the website which is accessible to only one person. To make it secure, I was thinking about providing a login page which checks if the ...
3
votes
2answers
212 views

Issues with using TLS Session Id for Web App Session?

Apache Tomcat has the ability to use the TLS Session ID instead of a session cookie or JSESSIONID in the querystring. My site is HTTPS Everywhere. This seems useful in that I don't have to worry ...