=========================================================================== Ubuntu Security Notice USN-3535-2 January 17, 2018 bind9 vulnerability =========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 ESM Summary: Bind could be made to crash if it received specially crafted network traffic. Software Description: - bind9: Internet Domain Name Server Details: USN-3535-1 fixed a vulnerability in Bind. This update provides the corresponding update for Ubuntu 12.04 ESM. Original advisory details: Jayachandran Palanisamy discovered that the Bind resolver incorrectly handled fetch cleanup sequencing. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: bind9=C2=A01:9.8.1.dfsg.P1-4ubuntu0.24 In general, a standard system update will make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3535-2 https://www.ubuntu.com/usn/usn-3535-1 CVE-2017-3145