Debian: DSA-4388-1 Critical: Mosquitto Authentication Bypass

Three vulnerabilities were discovered in the Mosquitto MQTT broker, which
could result in authentication bypass. Please refer to
https://mosquitto.org/blog/2019/02/version-1-5-6-released/ for additional
information.

For the stable distribution (stretch), these problems have been fixed in
version 1.4.10-3+deb9u3.

We recommend that you upgrade your mosquitto packages.

For the detailed security status of mosquitto please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/mosquitto

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/