CVE-2019-11778

Name	CVE-2019-11778
Description	If an MQTT v5 client connects to Eclipse Mosquitto versions 1.6.0 to 1.6.4 inclusive, sets a last will and testament, sets a will delay interval, sets a session expiry interval, and the will delay interval is set longer than the session expiry interval, then a use after free error occurs, which has the potential to cause a crash in some situations.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

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
mosquitto	source	wheezy	(unfixed)	end-of-life
mosquitto	source	jessie	(not affected)
mosquitto	source	stretch	(not affected)
mosquitto	source	buster	(not affected)
mosquitto	source	(unstable)	1.6.6-1

Notes

[buster] - mosquitto <not-affected> (Session expiry interval support introduced in 1.6)
[stretch] - mosquitto <not-affected> (Session expiry interval support introduced in 1.6)
[jessie] - mosquitto <not-affected> (Session expiry interval support introduced in 1.6)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=551162
https://github.com/eclipse/mosquitto/issues/1401
https://github.com/eclipse/mosquitto/commit/8407c6d146d1e8299127737d9735afc782e04ea8
https://github.com/eclipse/mosquitto/commit/6f3e7b9ceb43e2626a32340c26b69ac8ae5e9c8c
https://mosquitto.org/blog/2019/09/version-1-6-6-released/