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

    Date 26 Oct 2019
    548
    Posted By LinuxSecurity Advisories
    Several issues have been found in mosquitto, a MQTT version 3.1/3.1.1 compatible message broker.
    
    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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