The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10: bind9 1:9.11.4+dfsg-3ubuntu5.1 Ubuntu 18.04 LTS: bind9 1:9.11.3+dfsg-1ubuntu1.5 Ubuntu 16.04 LTS: bind9 1:9.10.3.dfsg.P4-8ubuntu1.12 Ubuntu 14.04 LTS: bind9 1:9.9.5.dfsg-3ubuntu0.19 In general, a standard system update will make all the necessary changes.
https://ubuntu.com/security/notices/USN-3893-1
CVE-2018-5744, CVE-2018-5745, CVE-2019-6465
https://launchpad.net/ubuntu/+source/bind9/1:9.11.4+dfsg-3ubuntu5.1 https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.5 https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-8ubuntu1.12 https://launchpad.net/ubuntu/+source/bind9/1:9.9.5.dfsg-3ubuntu0.19
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