| Name | CVE-2021-34434 |
| Description | In 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5511-1 |
| Debian Bugs | 993400 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| mosquitto (PTS) | buster, buster (security) | 1.5.7-1+deb10u1 | fixed |
| bullseye | 2.0.11-1 | vulnerable |
| bullseye (security) | 2.0.11-1+deb11u1 | fixed |
| bookworm | 2.0.11-1.2 | vulnerable |
| bookworm (security) | 2.0.11-1.2+deb12u1 | fixed |
| sid, trixie | 2.0.18-1 | fixed |
The information below is based on the following data on fixed versions.
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)