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) |
Such a scenario is commonly observed when: