1. Ubuntu Security Notices
  2. USN-6129-1

USN-6129-1: Avahi vulnerability

Publication date

1 June 2023

Overview

Avahi could be made to crash if it received specially crafted DBus traffic.

Releases

Packages

  • avahi - IPv4LL network address configuration daemon

Details

It was discovered that Avahi incorrectly handled certain DBus messages. A
local attacker could possibly use this issue to cause Avahi to crash,
resulting in a denial of service.

It was discovered that Avahi incorrectly handled certain DBus messages. A
local attacker could possibly use this issue to cause Avahi to crash,
resulting in a denial of service.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
23.04 lunar avahi-daemon –  0.8-6ubuntu1.23.04.1
22.10 kinetic avahi-daemon –  0.8-6ubuntu1.22.10.1
22.04 jammy avahi-daemon –  0.8-5ubuntu5.1
20.04 focal avahi-daemon –  0.7-4ubuntu7.2

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References

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