Package        : mosquitto
Version        : 1.3.4-2+deb8u4
CVE ID         : CVE-2017-7655 CVE-2018-12550 CVE-2018-12551
                  CVE-2019-11779


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.

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

Debian LTS: DLA-1972-1: mosquitto security update

October 26, 2019
Several issues have been found in mosquitto, a MQTT version 3.1/3.1.1 compatible message broker

Summary

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.

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



Severity
Package : mosquitto
Version : 1.3.4-2+deb8u4
CVE ID : CVE-2017-7655 CVE-2018-12550 CVE-2018-12551

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