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CVE-2021-41039

Published: 1 December 2021

In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
mosquitto
Launchpad, Ubuntu, Debian
kinetic Ignored
(end of life, was needs-triage)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
xenial Not vulnerable
(code-not-present)
bionic Not vulnerable
(code-not-present)
lunar Not vulnerable
(2.0.11-1.2)
mantic Not vulnerable
(2.0.18-1)
trusty Not vulnerable
(code not present)
upstream
Released (2.0.12)
focal
Released (1.6.9-1ubuntu0.1~esm1)
Available with Ubuntu Pro
jammy
Released (2.0.11-1ubuntu1.1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H