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USN-6129-2: Avahi vulnerability

25 July 2023

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

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Releases

Packages

  • avahi - IPv4LL network address configuration daemon

Details

USN-6129-1 fixed a vulnerability in Avahi. This update provides the
corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04
LTS.

Original advisory 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.

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 18.04
Ubuntu 16.04
Ubuntu 14.04

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

References

Related notices

  • USN-6129-1: avahi, python3-avahi, libavahi-gobject-dev, libavahi-common3, libavahi-compat-libdnssd-dev, libavahi-core-dev, libavahi-ui-gtk3-0, libavahi-glib-dev, gir1.2-avahi-0.6, avahi-autoipd, libavahi-gobject0, libavahi-glib1, libavahi-common-data, avahi-discover, libavahi-client-dev, libavahi-compat-libdnssd1, avahi-utils, libavahi-common-dev, avahi-daemon, libavahi-ui-gtk3-dev, python-avahi, avahi-dnsconfd, libavahi-core7, avahi-ui-utils, libavahi-client3