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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.3584
                    USN-4137-1: Mosquitto vulnerability
                             24 September 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Mosquitto
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-11779  

Original Bulletin: 
   https://usn.ubuntu.com/4137-1/

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USN-4137-1: Mosquitto vulnerability
23 September 2019

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

  o Ubuntu 19.04

Summary

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

Software Description

  o mosquitto - MQTT version 3. ^ 1 / [ 3 ] .1.1 compatible message broker

Details

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

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

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

References

  o CVE-2019-11779

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