CVE-2021-34434

NameCVE-2021-34434
DescriptionIn Eclipse Mosquitto versions 2.0 to 2.0.11, when using the dynamic security plugin, if the ability for a client to make subscriptions on a topic is revoked when a durable client is offline, then existing subscriptions for that client are not revoked.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs993400

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mosquitto (PTS)stretch (security), stretch1.4.10-3+deb9u4fixed
buster, buster (security)1.5.7-1+deb10u1fixed
bookworm, sid, bullseye2.0.11-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mosquittosourcestretch(not affected)
mosquittosourcebuster(not affected)
mosquittosource(unstable)(unfixed)993400

Notes

[buster] - mosquitto <not-affected> (Vulnerable code introduced later)
[stretch] - mosquitto <not-affected> (Vulnerable code introduced later)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=575324

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