CVE-2021-34431

MEDIUM

Eclipse Mosquitto 1.6-2.0.10 - Authenticated Denial of Service via MQTT v5 CONNECT Message

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Mailing List, Vendor Advisory x_refsource_confirm
https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191

Scores

CVSS v3 6.5
EPSS 0.0037
EPSS Percentile 59.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-401
Status published
Products (1)
eclipse/mosquitto 1.6 - 2.0.10
Published Jul 22, 2021
Tracked Since Feb 18, 2026