Executive Summary

Title Mosquitto vulnerability
Name USN-4137-1 First vendor Publication 2019-09-23
Vendor Ubuntu Last vendor Modification 2019-09-23
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:N/I:N/A:P)
Cvss Base Score 4 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores


A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04


Mosquitto could be made to crash or run programs if it received specially crafted network traffic.

Software Description: - mosquitto: MQTT version 3.1/3.1.1 compatible message broker


It was discovered that Mosquitto incorrectly handled certain specially crafted input and network packets. A remote attacker could use this to cause a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.04:
libmosquitto1 1.5.7-1ubuntu0.1
libmosquittopp1 1.5.7-1ubuntu0.1
mosquitto 1.5.7-1ubuntu0.1
mosquitto-clients 1.5.7-1ubuntu0.1

In general, a standard system update will make all the necessary changes.


Package Information:

Original Source

Url : http://www.ubuntu.com/usn/USN-4137-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-754 Improper Check for Unusual or Exceptional Conditions

CPE : Common Platform Enumeration

Application 1

Snort® IPS/IDS

Date Description
2019-11-26 Eclipse Mosquitto MQTT SUBSCRIBE request topic parsing buffer overflow attempt
RuleID : 52006 - Revision : 1 - Type : SERVER-OTHER

Alert History

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Date Informations
2019-09-23 21:19:11
  • First insertion