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Ubuntu 20.04 LTS: USN-4365-1 Critical: Bind DoS Security Advisory

Several security issues were fixed in Bind.. =========================================================================Ubuntu Security Notice USN-4365-1 May 19, 2020 bind9 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 19.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Several security issues were fixed in Bind. Software Description: - bind9: Internet Domain Name Server Details: Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind incorrectly limited certain fetches. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service, or possibly use Bind to perform a reflection attack. (CVE-2020-8616) Tobias Klein discovered that Bind incorrectly handled checking TSIG validity. A remote attacker could use this issue to cause Bind to crash, resulting in a denial of service, or possibly perform other attacks. (CVE-2020-8617) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: bind9 1:9.16.1-0ubuntu2.1 Ubuntu 19.10: bind9 1:9.11.5.P4+dfsg-5.1ubuntu2.2 Ubuntu 18.04 LTS: bind9 1:9.11.3+dfsg-1ubuntu1.12 Ubuntu 16.04 LTS: bind9 1:9.10.3.dfsg.P4-8ubuntu1.16 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4365-1 CVE-2020-8616, CVE-2020-8617 Package Information: https://launchpad.net/ubuntu/+source/bind9/1:9.16.1-0ubuntu2.1 https://launchpad.net/ubuntu/+source/bind9/1:9.11.5.P4+dfsg-5.1ubuntu2.2 https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.12 https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-8ubuntu1.16 . Uncover essential advisoriesregarding Bind vulnerabilities within Ubuntu impacting several versions alongside relevant information and solutions.. Bind Issues, Ubuntu Security Advisories, Denial of Service, Resource Management, Security Updates. . Severity: Critical. LinuxSecurity.com Team

May 19, 2020 •Critical Ubuntu