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Ubuntu 18.04 LTS: USN-6129-2 critical: avahi denial of service

ubuntu
Calendar Grey July 25, 2023
Dist Ubuntu Esm H88
Tackling the Avahi challenges within Ubuntu versions; resolutions encompassed in USN-6129-2 for system upgrades.
Avahi could be made to crash if it received specially crafted DBus traffic.

Summary

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

Software Description:

- 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.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu system update avahi

Update Instructions

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
avahi-daemon 0.7-3.1ubuntu1.3+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
avahi-daemon 0.6.32~rc+dfsg-1ubuntu2.3+esm2

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
avahi-daemon 0.6.31-4ubuntu1.3+esm2

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

References

https://ubuntu.com/security/notices/USN-6129-2

CVE-2023-1981

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6129-2

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu system update avahi

Package Information

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