CVE-2021-34431
6.5
MEDIUM
CVSS 3.1
EPSS 0.37%
Description
In Eclipse Mosquitto version 1.6 to 2.0.10, if an authenticated client that had connected with MQTT v5 sent a crafted CONNECT message to the broker a memory leak would occur, which could be used to provide a DoS attack against the broker.
How to fix CVE-2021-34431
To remediate CVE-2021-34431, upgrade the affected package to a fixed version below.
- Debian/mosquitto—upgrade to 2.0.11-1 or later
Is CVE-2021-34431 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.0.11-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |