CVE-2018-12550

Name	CVE-2018-12550
Description	When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty, or contains only comments or blank lines, then Mosquitto will treat this as though no ACL file has been defined and use a default allow policy. The new behaviour is to have an empty ACL file mean that all access is denied, which is not a useful configuration but is not unexpected.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1972-1, DSA-4388-1
Debian Bugs	921976

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mosquitto (PTS)	jessie, jessie (lts)	1.3.4-2+deb8u4	fixed
	stretch (security), stretch (lts), stretch	1.4.10-3+deb9u5	fixed
	buster (security), buster, buster (lts)	1.5.7-1+deb10u1	fixed
	bullseye (security), bullseye	2.0.11-1+deb11u1	fixed
	bookworm (security), bookworm	2.0.11-1.2+deb12u1	fixed
	sid, trixie	2.0.20-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
mosquitto	source	wheezy	(unfixed)	end-of-life
mosquitto	source	jessie	1.3.4-2+deb8u4		DLA-1972-1
mosquitto	source	stretch	1.4.10-3+deb9u3		DSA-4388-1
mosquitto	source	(unstable)	1.5.6-1			921976

https://mosquitto.org/blog/2019/02/version-1-5-6-released/
https://mosquitto.org/files/cve/2018-12550