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Debian LTS Advisory ([SECURITY] [DLA 1972-1] mosquitto security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

3 years ago

Modified

Modified

3 years ago

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.

Common Vulnerabilities and Exposures (CVE)