Ubuntu Security Notice USN-3973-1
May 13, 2019
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.10
– Ubuntu 18.04 LTS
DHCP could be made to crash if it received specially crafted network
– isc-dhcp: DHCP server and client
It was discovered that DHCP, when built with a mismatched external BIND
library, incorrectly handled certain memory operations. A remote attacker
could possibly use this issue to cause DHCP to crash, resulting in a
denial of service.
The problem can be corrected by updating your system to the following
Ubuntu 18.04 LTS:
In general, a standard system update will make all the necessary changes.