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USN-5658-2: DHCP vulnerabilities

7 November 2022

Several security issues were fixed in DHCP.

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Releases

Packages

Details

USN-5658-1 fixed vulnerabilities in DHCP. This update provides
the corresponding updates for Ubuntu 16.04 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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04

In general, a standard system update will make all the necessary changes.

Related notices

  • USN-5658-1: isc-dhcp-server-ldap, isc-dhcp-client-ddns, isc-dhcp-relay, isc-dhcp-server, isc-dhcp, isc-dhcp-dev, isc-dhcp-client, isc-dhcp-common
  • USN-5658-3: isc-dhcp-server-ldap, isc-dhcp-relay, isc-dhcp-server, isc-dhcp, isc-dhcp-client-noddns, isc-dhcp-dev, isc-dhcp-client, isc-dhcp-common