So, how are you protecting your applications against session hijacking?
For many web applications, the harsh reality is that once a session cookie is stolen, the game is basically over. With infostealer malware now exfiltrating cookies along with everything else, the assumption that “possession of the cookie equals proof of identity” is gradually becoming less reliable.
In this article, I will show how to use AWS WAF Dynamic Label Interpolation to pass a JA4 TLS fingerprint to your application and bind it to the user’s session. With this design, even if an attacker steals a session cookie, the application can detect its use when the attacker’s TLS stack differs from that of the legitimate user.
I previously wrote about mitigating session hijacking with an “Impossible Location” check. You can think of this article as a location-independent version of that approach.
The other articles in this series are listed below. This article is also written to stand on its own, so you can continue reading without them.
