PHP Session Fixation / Hijacking


Last Update : 2023-09-22 UTC 11:16:57 AM

Answers of > PHP Session Fixation / Hijacking

To help prevent session fixation, is it w3coded session fixation enough to call session_regenerate_id(true); w3coded session fixation after successfully logging someone in? I think I w3coded session fixation understand that correctly.,I'm trying to w3coded session fixation understand more about PHP Session Fixation and w3coded session fixation hijacking and how to prevent these problems. w3coded session fixation I've been reading the following two articles on w3coded session fixation Chris Shiflett's website:,This is where an w3coded session fixation attacker explicitly sets the session identifier w3coded session fixation of a session for a user. Typically in PHP it's w3coded session fixation done by giving them a url like w3coded session fixation w3coded session fixation Once the attacker gives the url to the client, w3coded session fixation the attack is the same as a session hijacking w3coded session fixation attack.,The difference between Session Fixation w3coded session fixation and Hijacking is only about how the session w3coded session fixation identifier is compromised. In fixation, the w3coded session fixation identifier is set to a value that the attacker w3coded session fixation knows before hand. In Hijacking it's either w3coded session fixation guessed or stolen from the user. Otherwise the w3coded session fixation effects of the two are the same once the w3coded session fixation identifier is compromised.

If you're going to destroy a session (on logout for example), make sure you destroy it thoroughly. This includes unsetting the cookie. Using session_destroy:

function destroySession() {
    $params = session_get_cookie_params();
    setcookie(session_name(), '', time() - 42000,
        $params["path"], $params["domain"],
        $params["secure"], $params["httponly"]

Another drawback to nonces is that it's very hard to build a system that uses them and allows multiple parallel windows on the same form. e.g. the user opens two windows on a forum, and starts working on two posts:

window 'A' loads first and gets nonce 'P'
window 'B' loads second and gets nonce 'Q'

Current topics : PHP Session Fixation / Hijacking

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