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, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5511-1
Debian Bugs993400

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mosquitto (PTS)jessie, jessie (lts)1.3.4-2+deb8u4fixed
stretch (security), stretch (lts), stretch1.4.10-3+deb9u5fixed
buster, buster (security)1.5.7-1+deb10u1fixed
bullseye (security), bullseye2.0.11-1+deb11u1fixed
bookworm (security), bookworm2.0.11-1.2+deb12u1fixed
sid, trixie2.0.18-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mosquittosourcejessie(not affected)
mosquittosourcestretch(not affected)
mosquittosourcebuster(not affected)
mosquittosourcebullseye2.0.11-1+deb11u1DSA-5511-1
mosquittosourcebookworm2.0.11-1.2+deb12u1DSA-5511-1
mosquittosource(unstable)2.0.15-1993400

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
https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/638
Fixed by: https://github.com/eclipse/mosquitto/commit/32af599c81e63fa38e834b8f1c1f108c49328e95 (v2.0.12)
[jessie] - mosquitto <not-affected> (Vulnerable code not present)

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