Dnsmasq could cause transmission reliability issues when sending large DNS messages.. =========================================================================Ubuntu Security Notice USN-6034-1 April 20, 2023 dnsmasq vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.10 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM 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. 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 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 . Dnsmasq may lead to network stability concerns in Ubuntu environments. It's advisable to refresh your systems for enhanced efficiency.. Dnsmasq Transmission, Ubuntu Update, DNS Reliability Issues. . Severity: Critical. LinuxSecurity.com Team
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