Debian alert DLA-1972-1 (mosquitto)

From:
             
 
Thorsten Alteholz <debian@alteholz.de> 
To:
             
 
debian-lts-announce@lists.debian.org 
Subject:
             
 
[SECURITY] [DLA 1972-1] mosquitto security update 
Date:
             
 
Sat, 26 Oct 2019 23:33:17 +0200 (CEST)
Message-ID:
             
 
<alpine.DEB.2.20.1910262330440.13905@jupiter.server.alteholz.net>
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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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