Ubuntu Security Notice USN-5658-3
November 21, 2022
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.04 ESM
Several security issues were fixed in DHCP.
– isc-dhcp: DHCP server and client
USN-5658-1 fixed several vulnerabilities in DHCP. This update provides
the corresponding update for Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that DHCP incorrectly handled option reference counting.
A remote attacker could possibly use this issue to cause DHCP servers to
crash, resulting in a denial of service. (CVE-2022-2928)
It was discovered that DHCP incorrectly handled certain memory operations.
A remote attacker could possibly use this issue to cause DHCP clients and
servers to consume resources, leading to a denial of service.
The problem can be corrected by updating your system to the following
Ubuntu 14.04 ESM:
In general, a standard system update will make all the necessary changes.