Ubuntu Security Notice USN-4737-2
March 01, 2021
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.04 ESM
– Ubuntu 12.04 ESM
Bind could be made to crash or run programs if it received specially
crafted network traffic.
– bind9: Internet Domain Name Server
USN-4737-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that Bind incorrectly handled GSSAPI security policy
negotiation. A remote attacker could use this issue to cause Bind to crash,
resulting in a denial of service, or possibly execute arbitrary code. In
the default installation, attackers would be isolated by the Bind AppArmor
The problem can be corrected by updating your system to the following
Ubuntu 14.04 ESM:
Ubuntu 12.04 ESM:
In general, a standard system update will make all the necessary changes.