========================================================================== Ubuntu Security Notice USN-3259-1 April 17, 2017 bind9 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 17.04 - Ubuntu 16.10 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS Summary: Several security issues were fixed in Bind. Software Description: - bind9: Internet Domain Name Server Details: It was discovered that the resolver in Bind made incorrect assumptions about ordering when processing responses containing a CNAME or DNAME. An attacker could use this cause a denial of service. (CVE-2017-3137) Oleg Gorokhov discovered that in some situations, Bind did not properly handle DNS64 queries. An attacker could use this to cause a denial of service. (CVE-2017-3136) Mike Lalumiere discovered that in some situations, Bind did not properly handle invalid operations requested via its control channel. An attacker with access to the control channel could cause a denial of service. (CVE-2017-3138) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: bind9 1:9.10.3.dfsg.P4-10.1ubuntu5 Ubuntu 16.10: bind9 1:9.10.3.dfsg.P4-10.1ubuntu1.6 Ubuntu 16.04 LTS: bind9 1:9.10.3.dfsg.P4-8ubuntu1.6 Ubuntu 14.04 LTS: bind9 1:9.9.5.dfsg-3ubuntu0.14 Ubuntu 12.04 LTS: bind9 1:9.8.1.dfsg.P1-4ubuntu0.22 In general, a standard system update will make all the necessary changes. References: http://www.ubuntu.com/usn/usn-3259-1 CVE-2017-3136, CVE-2017-3137, CVE-2017-3138 Package Information: https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-10.1ubuntu5 https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-10.1ubuntu1.6 https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-8ubuntu1.6 https://launchpad.net/ubuntu/+source/bind9/1:9.9.5.dfsg-3ubuntu0.14 https://launchpad.net/ubuntu/+source/bind9/1:9.8.1.dfsg.P1-4ubuntu0.22