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Ubuntu 21.04: USN-5008-1 Critical Denial of Service in Avahi

ubuntu
Calendar Grey July 7, 2021
Dist Ubuntu Esm H88
Various security vulnerabilities in Ubuntu's Avahi have been resolved across multiple releases, mitigating potential denial of service threats.
Several security issues were fixed in Avahi.

Summary

Topics%20covered

Topics Covered

security advisory denial of service local attack ubuntu network issues avahi

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: avahi-daemon 0.8-5ubuntu3.1 libavahi-core7 0.8-5ubuntu3.1 Ubuntu 20.10: avahi-daemon 0.8-3ubuntu1.1 libavahi-core7 0.8-3ubuntu1.1 Ubuntu 20.04 LTS: avahi-daemon 0.7-4ubuntu7.1 libavahi-core7 0.7-4ubuntu7.1 Ubuntu 18.04 LTS: avahi-daemon 0.7-3.1ubuntu1.3 libavahi-core7 0.7-3.1ubuntu1.3 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5008-1

CVE-2021-3468, CVE-2021-3502

Severity
critical
Lowest
Low
Medium
High
Critical

July 07, 2021

Topics%20covered

Topics Covered

security advisory denial of service local attack ubuntu network issues avahi

Package Information

https://launchpad.net/ubuntu/+source/avahi/0.8-5ubuntu3.1 https://launchpad.net/ubuntu/+source/avahi/0.8-3ubuntu1.1 https://launchpad.net/ubuntu/+source/avahi/0.7-4ubuntu7.1 https://launchpad.net/ubuntu/+source/avahi/0.7-3.1ubuntu1.3

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