CVE-2021-28166
6.5
MEDIUM
CVSS 3.1
EPSS 0.58%
Description
In Eclipse Mosquitto version 2.0.0 to 2.0.9, if an authenticated client that had connected with MQTT v5 sent a crafted CONNACK message to the broker, a NULL pointer dereference would occur.
How to fix CVE-2021-28166
To remediate CVE-2021-28166, upgrade the affected package to a fixed version below.
- Alpine/mosquitto—upgrade to 2.0.10-r0 or later
- Debian/mosquitto—upgrade to 2.0.10-1 or later
Is CVE-2021-28166 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.0.10-r0
- from 0, < 2.0.10-1
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 |