CVE-2021-34434 · cross-distro fix matrix

CVE-2021-34434: 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.

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-34434 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

mosquitto→ fixed in2.0.11-1+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mosquitto
```

Debian bookworm

Source: Debian Security Tracker

mosquitto→ fixed in2.0.11-1.2+deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mosquitto
```

Debian trixie

Source: Debian Security Tracker

mosquitto→ fixed in2.0.15-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mosquitto
```

Are YOU affected by CVE-2021-34434?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

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