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Ubuntu 21.04 USN-4976-1: Dnsmasq Cache Poisoning Threat

ubuntu
Calendar Grey June 2, 2021
Dist Ubuntu Esm H88
A flaw in Dnsmasq on Ubuntu may allow for cache poisoning assaults. Ensure you implement the latest updates to safeguard your infrastructure.
Dnsmasq could be exposed to cache poisoning.

Summary

Topics%20covered

Topics Covered

security advisory security issue Ubuntu remote threat update instructions cache poisoning dnsmasq

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: dnsmasq 2.84-1ubuntu2.1 dnsmasq-base 2.84-1ubuntu2.1 dnsmasq-utils 2.84-1ubuntu2.1 Ubuntu 20.10: dnsmasq 2.82-1ubuntu1.3 dnsmasq-base 2.82-1ubuntu1.3 dnsmasq-utils 2.82-1ubuntu1.3 Ubuntu 20.04 LTS: dnsmasq 2.80-1.1ubuntu1.4 dnsmasq-base 2.80-1.1ubuntu1.4 dnsmasq-utils 2.80-1.1ubuntu1.4 Ubuntu 18.04 LTS: dnsmasq 2.79-1ubuntu0.4 dnsmasq-base 2.79-1ubuntu0.4 dnsmasq-utils 2.79-1ubuntu0.4 After a standard system update you need to reboot your computer to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4976-1

CVE-2021-3448

Severity
critical
Lowest
Low
Medium
High
Critical

June 02, 2021

Topics%20covered

Topics Covered

security advisory security issue Ubuntu remote threat update instructions cache poisoning dnsmasq

Package Information

https://launchpad.net/ubuntu/+source/dnsmasq/2.84-1ubuntu2.1 https://launchpad.net/ubuntu/+source/dnsmasq/2.82-1ubuntu1.3 https://launchpad.net/ubuntu/+source/dnsmasq/2.80-1.1ubuntu1.4 https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1ubuntu0.4

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