CVE-2021-34434
mosquitto - security update
5.3
MEDIUM
CVSS 3.1
EPSS 0.36%
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.
How to fix CVE-2021-34434
To remediate CVE-2021-34434, upgrade the affected package to a fixed version below.
- Debian/mosquitto—upgrade to 2.0.11-1+deb11u1 or later
- —upgrade to 2.0.11-1+deb11u1 or later
Is CVE-2021-34434 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.0.11-1+deb11u1
- from 0, < 2.0.11-1+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |