[SECURITY] [DLA 1972-1] mosquitto security update
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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
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