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Debian LTS Advisory ([SECURITY] [DLA 1972-1] mosquitto security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'mosquitto' package(s) announced via the DSA-1972-1 advisory.
Insight
Insight
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)
Affected Software
Affected Software
'mosquitto' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For Debian 8 'Jessie', these problems have been fixed in version 1.3.4-2+deb8u4. We recommend that you upgrade your mosquitto packages.