In Mosquitto through 1.4.12, mosquitto.db (aka the persistence file) is world readable, which allows local users to obtain sensitive MQTT topic information.

CVE-2017-7653

As invalid UTF-8 strings are not correctly checked, an attacker could cause a denial of service to other clients by disconnecting them from the broker with special crafted topics.

CVE-2017-7654

Due to a memory leak unauthenticated clients can send special crafted CONNECT packets which could cause a denial of service in the broker.

CVE-2017-9868

Due to wrong file permissions local users could obtain topic information from the mosquitto database.

For Debian 8 'Jessie', these problems have been fixed in version 1.3.4-2+deb8u3.

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.

mosquitto's persistence file (mosquitto.db) was created in a world-readable way thus allowing local users to obtain sensitive MQTT topic information. While the application has been fixed to set proper permissions by default, you still have to manually fix the permissions on any existing file.

For Debian 7 'Wheezy', these problems have been fixed in version 0.15-2+deb7u2.

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.

Fix CVE-2017-9868 (rhbz#1464946)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
117835	Debian DLA-1525-1 : mosquitto security update	Nessus	Debian Local Security Checks	medium
104185	Debian DLA-1146-1 : mosquitto security update	Nessus	Debian Local Security Checks	medium
101729	Fedora 26 : mosquitto (2017-d76189b06d)	Nessus	Fedora Local Security Checks	medium
101508	Fedora 25 : mosquitto (2017-79886ea453)	Nessus	Fedora Local Security Checks	medium
101507	Fedora 24 : mosquitto (2017-749f4c7d2a)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2017-9868

medium

Tenable Plugins

medium

medium

medium

medium

medium