ArchLinux: 201810-1: mosquitto: denial of service
Summary
If a message is sent to Mosquitto before 1.5.3 with a topic that begins with $, but is not $SYS, then an assert that should be unreachable is triggered and Mosquitto will exit.
Resolution
Upgrade to 1.5.3-1.
# pacman -Syu "mosquitto>=1.5.3-1"
The problem has been fixed upstream in version 1.5.3.
References
https://mosquitto.org/blog/2018/09/security-advisory-cve-2018-12543/ https://github.com/eclipse/mosquitto/commit/f7474d348225bf086f6b9c69b18d6413aa6ffca6 https://security.archlinux.org/CVE-2018-12543
Workaround
None.