Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-6492-1: Mosquitto vulnerabilities

21 November 2023

Several security issues were fixed in Mosquitto.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

  • mosquitto - MQTT version 3.1/3.1.1 compatible message broker

Details

Kathrin Kleinhammer discovered that Mosquitto incorrectly handled certain
inputs. If a user or an automated system were provided with a specially crafted
input, a remote attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-34431)

Zhanxiang Song discovered that Mosquitto incorrectly handled certain inputs. If
a user or an automated system were provided with a specially crafted input, a
remote attacker could possibly use this issue to cause an authorisation bypass.
This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2021-34434)

Zhanxiang Song, Bin Yuan, DeQing Zou, and Hai Jin discovered that Mosquitto
incorrectly handled certain inputs. If a user or an automated system were
provided with a specially crafted input, a remote attacker could possibly use
this issue to cause a denial of service. This issue only affected Ubuntu 20.04
LTS and Ubuntu 22.04 LTS. (CVE-2021-41039)

Zhengjie Du discovered that Mosquitto incorrectly handled certain inputs. If a
user or an automated system were provided with a specially crafted input file,
a remote attacker could possibly use this issue to cause a denial of service.
(CVE-2023-0809)

It was discovered that Mosquitto incorrectly handled certain inputs. If a user
or an automated system were provided with a specially crafted input, a remote
attacker could possibly use this issue to cause a denial of service.
(CVE-2023-3592)

Mischa Bachmann discovered that Mosquitto incorrectly handled certain inputs.
If a user or an automated system were provided with a specially crafted input,
a remote attacker could possibly use this issue to cause a denial of service.
This issue was only fixed in Ubuntu 22.04 LTS and Ubuntu 23.04.
(CVE-2023-28366)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 23.04
Ubuntu 22.04
Ubuntu 20.04

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

References

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading