In Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) when a client publishes a retained message to a topic, then has its access to that topic revoked, the retained message will still be published to clients that subscribe to that topic in the future. In some applications this may result in clients being able cause effects that would otherwise not be allowed.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mosquitto | Eclipse | 1.0 (including) | 1.5.5 (including) |
| Mosquitto | Ubuntu | bionic | * |
| Mosquitto | Ubuntu | cosmic | * |
| Mosquitto | Ubuntu | trusty | * |
| Mosquitto | Ubuntu | upstream | * |
| Mosquitto | Ubuntu | xenial | * |
Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: