1. Ubuntu Security Notices
  2. USN-5658-2

USN-5658-2: DHCP vulnerabilities

Publication date

7 November 2022

Overview

Several security issues were fixed in DHCP.

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)

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)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.04 xenial isc-dhcp-client –  4.3.3-5ubuntu12.10+esm2  
isc-dhcp-server –  4.3.3-5ubuntu12.10+esm2  

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.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›