USN-5658-3: DHCP vulnerabilities
21 November 2022
Several security issues were fixed in DHCP.
Releases
Packages
- isc-dhcp - DHCP server and client
Details
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.
(CVE-2022-2929)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 14.04
-
isc-dhcp-client
-
4.2.4-7ubuntu12.13+esm2
Available with Ubuntu Pro
-
isc-dhcp-server
-
4.2.4-7ubuntu12.13+esm2
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-5658-1: isc-dhcp-dev, isc-dhcp, isc-dhcp-client, isc-dhcp-server, isc-dhcp-common, isc-dhcp-client-ddns, isc-dhcp-relay, isc-dhcp-server-ldap
- USN-5658-2: isc-dhcp-dev, isc-dhcp, isc-dhcp-client, isc-dhcp-server, isc-dhcp-common, isc-dhcp-client-ddns, isc-dhcp-relay, isc-dhcp-server-ldap