Debian Security Advisory
DLA-1972-1 mosquitto -- LTS security update
- Date Reported:
- 26 Oct 2019
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2017-7655, CVE-2018-12550, CVE-2018-12551, CVE-2019-11779.
- More information:
Several issues have been found in mosquitto, a MQTT version 3.1/3.1.1 compatible message broker.
A Null dereference vulnerability in the Mosquitto library could lead to crashes for those applications using the library.
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)
Malformed authentication data in the password file could allow clients to circumvent authentication and get access to the broker.
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.
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS