In Eclipse Mosquitto 1.4.14, a user can shutdown the Mosquitto server simply by filling the RAM memory with a lot of connections with large payload. This can be done without authentications if occur in connection phase of MQTT protocol.
Weakness
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mosquitto | Eclipse | * | 1.4.14 (including) |
| Mosquitto | Ubuntu | artful | * |
| Mosquitto | Ubuntu | esm-apps/xenial | * |
| Mosquitto | Ubuntu | esm-infra-legacy/trusty | * |
| Mosquitto | Ubuntu | trusty | * |
| Mosquitto | Ubuntu | trusty/esm | * |
| Mosquitto | Ubuntu | upstream | * |
| Mosquitto | Ubuntu | xenial | * |
Potential Mitigations
References
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=529754
- https://lists.debian.org/debian-lts-announce/2018/03/msg00037.html
- https://lists.debian.org/debian-lts-announce/2018/06/msg00016.html
- https://mosquitto.org/blog/2018/02/security-advisory-cve-2017-7651-cve-2017-7652/
- https://www.debian.org/security/2018/dsa-4325
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=529754
- https://lists.debian.org/debian-lts-announce/2018/03/msg00037.html
- https://lists.debian.org/debian-lts-announce/2018/06/msg00016.html
- https://mosquitto.org/blog/2018/02/security-advisory-cve-2017-7651-cve-2017-7652/
- https://www.debian.org/security/2018/dsa-4325