Debian DLA-1972-1 : mosquitto security update

critical Nessus Plugin ID 130285

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Synopsis

The remote Debian host is missing a security update.

Description

Several issues have been found in mosquitto, a MQTT version 3.1/3.1.1 compatible message broker.

CVE-2017-7655

A Null dereference vulnerability in the Mosquitto library could lead to crashes for those applications using the library.

CVE-2018-12550

An ACL file with no statements was treated as having a default allow policy. The new behaviour of an empty ACL file is a default policy of access denied. (this is in compliance with all newer releases)

CVE-2018-12551

Malformed authentication data in the password file could allow clients to circumvent authentication and get access to the broker.

CVE-2019-11779

Fix for processing a crafted SUBSCRIBE packet containing a topic that consists of approximately 65400 or more '/' characters. (setting TOPIC_HIERARCHY_LIMIT to 200)

For Debian 8 'Jessie', these problems have been fixed in version 1.3.4-2+deb8u4.

We recommend that you upgrade your mosquitto packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

Plugin Details

Severity: Critical

ID: 130285

File Name: debian_DLA-1972.nasl

Version: 1.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/28/2019

Updated: 2/18/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-12551

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: manual

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:python-mosquitto, p-cpe:/a:debian:debian_linux:libmosquittopp1, p-cpe:/a:debian:debian_linux:mosquitto-clients, p-cpe:/a:debian:debian_linux:mosquitto-dbg, p-cpe:/a:debian:debian_linux:python3-mosquitto, p-cpe:/a:debian:debian_linux:libmosquittopp-dev, p-cpe:/a:debian:debian_linux:libmosquitto1, cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:mosquitto, p-cpe:/a:debian:debian_linux:libmosquitto-dev

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/26/2019

Vulnerability Publication Date: 3/27/2019

Reference Information

CVE: CVE-2017-7655, CVE-2018-12550, CVE-2018-12551, CVE-2019-11779

Detections

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