USN-4969-2: DHCP vulnerability
27 May 2021
DHCP could be made to crash if it received specially crafted network traffic.
- isc-dhcp - DHCP server and client
USN-4969-1 fixed a vulnerability in DHCP. This update provides
the corresponding update for Ubuntu 14.04 ESM and 16.04 ESM.
Original advisory details:
Jon Franklin and Pawel Wieczorkiewicz discovered that DHCP incorrectly
handled lease file parsing. 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 package versions:
In general, a standard system update will make all the necessary changes.
- USN-4969-1: isc-dhcp, isc-dhcp-client-udeb, isc-dhcp-relay, isc-dhcp-server-ldap, isc-dhcp-common, isc-dhcp-server, isc-dhcp-client-ddns, isc-dhcp-dev, isc-dhcp-client