PT-2021-17785 · Eclipse · Eclipse Mosquitto

Roger Light · Published 2021-04-07 · Updated 2021-04-14 · CVE-2021-28166

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Eclipse Mosquitto versions 2.0.0 through 2.0.9

Description: The issue occurs when an authenticated client connected with MQTT v5 sends a crafted CONNACK message to the broker, resulting in a NULL pointer dereference.

Recommendations: For Eclipse Mosquitto versions 2.0.0 through 2.0.9, consider restricting the use of MQTT v5 connections until a patch is available. As a temporary workaround, avoid allowing clients to send crafted CONNACK messages to the broker. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2021-28166

OPENSUSE-SU-2024:11057-1

Affected Products

Eclipse Mosquitto

References · 11

• https://bugs.eclipse.org/bugs/show_bug.cgi?id=572608 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-28166 · Security Note
• https://osv.dev/vulnerability/CVE-2021-28166 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-28166 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-28166 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-28166 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2021-28166 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-28166 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-28166 · Vendor Advisory
• https://t.me/cvenotify/13182 · Telegram Post
• https://security.alpinelinux.org/vuln/CVE-2021-28166 · Note