Once the user account is successfully authenticated, the server creates a temporary digital passport known as a "session" that will prove the identity of the user as they navigate through different pages in the web application. However, if there is no good session security, such a convenient identification technique will be an open invitation for attacks.
Should the hacker be able to get hold of the session ID or even predict it, the login page will not be a barrier anymore, since no username, password, or two-factor authentication will be needed on his part, since they only needs to pretend to be a real user.
The Top Two Session Threats
To protect your infrastructure from being used by attackers, there are various ways in which they try to do this. These include:
- Session Hijacking (Cookie Theft): Hackers adopt techniques such as XSS or intercepting unencrypted Wi-Fi to steal the session cookie. This is then injected into the hacker’s web browser to gain control over the user's session.
- Session Fixation: The technique followed here is different because hackers fix an ID in the victim’s web browser instead of stealing it. Once the user logs in through this session, the hacker gets access to their account.
Best Practices for Ironclad Session Security
The following are some of the measures that should be put in place for the protection of the session lifecycle:
- Regenerate Identifiers Upon Authentication: Never reuse the same session ID after a user successfully logs in or escalates their privileges. Automatically generating a brand-new, complex, and highly randomized session ID upon authentication is the absolute best way to neutralize session fixation attacks.
- Lock Down Your Cookies Session: Tokens are usually stored in browser cookies. You must configure these cookies with strict security flags:
- HttpOnly: This prevents client-side scripts (like JavaScript) from reading the cookie, effectively neutralizing XSS-based cookie theft.
- Secure: This guarantees that the session cookie will only ever be transmitted over an encrypted HTTPS connection.
- SameSite: This flag restricts how cookies are sent with cross-site requests, providing massive protection against Cross-Site Request Forgery (CSRF).
- Use Strict Expiration Requirements: A session must have a limited lifespan. Use strict timeouts – force re-login after a certain number of hours and close the session in 15-30 minutes of inactivity. The more quickly a session expires, the less time an intruder has to do something harmful.
- Client Fingerprint Validation: You may add another level of verification of a session ID by linking it to the user's unique environment – unexpected changes in IP or User-Agent string of a browser used to open a site. If a session was created using a Chrome browser in New York but suddenly starts sending requests from a Firefox browser in Eastern Europe, the session will be considered invalid, and re-authentication will be required.
Session security is a very important aspect when securing any Web application. The best means of authentication could become ineffective if the aspects of session security are not well catered for. It will be possible to have the session ID regenerated after authentication, have the cookies be set to a secure state, have a good session timeout, and perform session validation, and this will ensure that there will be minimal chances of suffering from any attacks through session hijacking or fixation on the Web application.
To read more about How User Session Creation Works In Odoo: Everything You Need to Know, refer to our blog How User Session Creation Works In Odoo: Everything You Need to Know.