Some more common solutions to securing session ID variables is to use SSL only generate the authenticated session ID after successful login over SSL, else you become vulnerable to session fixation generate cryptographically random and unguessable tokens expire session IDs frequently properly expire then server-side on log out mark the session ID cookie as HttpOnly and 'secure' I suppose it depends on how you would implement this whole thing, but the liklihood is that you would run into a host of runtime issues tracking the changing session id's.
Related Security risks of fetching user-supplied URLs Is it safe to send sensitive data in the post body to an azure function? Security implication if android app can be installed on emulator How good are Angular Route Guards from a security standpoint? Is an up-to-date browser secure on an out-of-date OS? Care should be taken when relying on the session for authentication. Especially if the first session is closed and it's time to open the second. Because the session id is cached you also have to explicitly set it the second time.
To add to php at 5mm de's comments: If the session is held over https, it's even better to save the client's cert or ssl session id instead of the hostname or ip, as it's proxy-transparent and more secure.
Most AOL-users do. Document example is wrong with usage of "session. I handled the bogus session-id's like this. This can be a very dangerous function if you're not careful about how you handle things, because even though it generates a whole new set of session data, it keeps the old data "open" until the script terminates, locking out any other scripts trying to run concurrently with the old session id.
But I quickly found that these "other scripts" would not execute until the first script finished--even though it had already started a new session--because it kept the old session open.
In order to manipulate a session after destroying it, you need to restart it. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search.
I have created a class that will manage my session. I am hoping to acomplish a class that will secure my site from all known attacks ie.
On the login page and after the user name and password match the database. I start a new session:. I like this question because I think it has a lot of answering potential. I'm going to touch on a few things, but my answer shouldn't be considered complete! There's one thing that's most important here: don't roll out a security system that's been built with only one pair of hands. It's asking for a disaster! I won't do the research for you, but I suggest you look at other more established session customization libraries.
Head over to Github and start searching. You're looking for a library that meets your requirements, plus has some sort of accreditation. The more users using the code, the safer it will be. Posting code here on Code Review is a start, but it's not enough. That includes users' passwords! So are there any flaws that the naked eye can see in your code? Most definitely! After a user's session ID has been fixed, the attacker will wait for that user to login.
Once the user does so, the attacker uses the predefined session ID value to assume the same online identity. Session Fixation Nice read. To answer the "When should I use this? Or, to put it another way, this is the key security question you need to answer. If all you do is track otherwise anonymous data user comes to site and you use it to track their visits then there's little reason to regenerate a session.
A hijacker wouldn't gain anything of value by grabbing that session. Lots of sites offer logins, however. A login changes lots of things. I can access my profile. I can change settings. So a hijacker might want my account access, especially if normal and admin users all use sessions to manage the login. So when people come to my site and log in I regenerate the session.
It adds an extra layer of security that my newly logged in user is less likely to get hijacked. Any time we add critical data to a session you should consider regenerating the session ID. If you need to harden your application against fixation then a random regeneration can be useful but I would NEVER regenerate on every request.
By default PHP stores sessions in files on the local disk. You should use it to prevent session fixation. Bob sits at a public computer and by browsing stackoverflow. The session ID is saved in a cookie with httpOnly flag to prevent access through javascript. Bob writes down the session ID. He leaves the computer without closing the browser. Now Alice comes to this computer and sees Stack Overflow is already loaded.
She logs in now. If you don't create a new session ID here during login, Bob could use the previous session he had written down to access Alice' session and would be logged in as Alice now. So hacker can use that cookie to use their session. But there is a little point lets say you are using regenerate method and your client just login to website and close browser or inactive. As explained above this way you can protect your client from data sniffing on one way, but still its not will fix this issue for good.
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