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Ubuntu 22.10 USN-6034-1 Critical: Dnsmasq Transmission Reliability Issue

ubuntu
Calendar Grey April 20, 2023
Dist Ubuntu Esm H88
Dnsmasq may lead to network stability concerns in Ubuntu environments. It's advisable to refresh your systems for enhanced efficiency.
Dnsmasq could cause transmission reliability issues when sending large DNS messages.

Summary

Dnsmasq could cause transmission reliability issues when

sending large DNS messages.

Software Description:

- dnsmasq: Small caching DNS proxy and DHCP/TFTP server

Details:

It was discovered that Dnsmasq was sending large DNS messages

over UDP, possibly causing transmission failures due to IP

fragmentation. This update lowers the default maximum size of

DNS messages to improve transmission reliability over UDP.

Topics%20covered

Topics Covered

security advisory critical ubuntu dnsmasq udp issue transmission reliability

Update Instructions

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

Ubuntu 22.10:
   dnsmasq-base                    2.86-1.1ubuntu2.1

Ubuntu 22.04 LTS:
   dnsmasq-base                    2.86-1.1ubuntu0.3

Ubuntu 20.04 LTS:
   dnsmasq-base                    2.80-1.1ubuntu1.7

Ubuntu 18.04 LTS:
   dnsmasq-base                    2.79-1ubuntu0.7

Ubuntu 16.04 ESM:
   dnsmasq-base                    2.79-1ubuntu0.16.04.1+esm2

Ubuntu 14.04 ESM:
   dnsmasq-base                    2.68-1ubuntu0.2+esm2

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

  https://ubuntu.com/security/notices/USN-6034-1

  CVE-2023-28450

Severity
critical
Lowest
Low
Medium
High
Critical

April 20, 2023

Topics%20covered

Topics Covered

security advisory critical ubuntu dnsmasq udp issue transmission reliability

Package Information

  https://launchpad.net/ubuntu/+source/dnsmasq/2.86-1.1ubuntu2.1
  https://launchpad.net/ubuntu/+source/dnsmasq/2.86-1.1ubuntu0.3
  https://launchpad.net/ubuntu/+source/dnsmasq/2.80-1.1ubuntu1.7
  https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1ubuntu0.7

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