The Connection handler in Hazelcast and Hazelcast Jet allows a remote unauthenticated attacker to access and manipulate data in the cluster with the identity of another already authenticated connection. The affected Hazelcast versions are through 4.0.6, 4.1.9, 4.2.5, 5.0.3, and 5.1.2. The affected Hazelcast Jet versions are through 4.5.3.
Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Hazelcast | Hazelcast | * | 3.12.13 (excluding) |
| Hazelcast | Hazelcast | 4.0.0 (including) | 4.1.10 (excluding) |
| Hazelcast | Hazelcast | 4.2.0 (including) | 4.2.6 (excluding) |
| Hazelcast | Hazelcast | 5.0.0 (including) | 5.0.4 (excluding) |
| Hazelcast | Hazelcast | 5.1.0 (including) | 5.1.3 (excluding) |
| Hazelcast-jet | Hazelcast | * | 4.5.4 (excluding) |
| Red Hat Fuse 7.11.1.P1 | RedHat | hazelcast | * |
| Red Hat Fuse 7.12 | RedHat | * | |
| Red Hat Fuse on EAP 7.11.1.P1 | RedHat | hazelcast | * |
Such a scenario is commonly observed when:
In the generic exploit of session fixation vulnerabilities, an attacker creates a new session on a web application and records the associated session identifier. The attacker then causes the victim to associate, and possibly authenticate, against the server using that session identifier, giving the attacker access to the user’s account through the active session.