CVE-2019-6472 A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate

Medium 6.5 Published 16 Oct 2019 Updated 17 Sep 2024

A remote attacker can cause the Kea DHCPv6 server to crash by sending a packet with a malformed DUID, resulting in a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2019-6472?

CVE-2019-6472 is a medium-severity denial of service vulnerability in ISC Kea, published on 16 Oct 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A packet containing a malformed DUID can cause the Kea DHCPv6 server process (kea-dhcp6) to exit due to an assertion failure. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.

Weakness: CWE-617

Which versions are affected by CVE-2019-6472?

It affects 1 product.

Products include Isc Kea.

How do I fix CVE-2019-6472?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-6472 being exploited?

There is no known exploitation of CVE-2019-6472 in the wild and no public exploit code.

Sources

Also known as ALPINE-CVE-2019-6472, DEBIAN-CVE-2019-6472, GHSA-fq2x-j295-rq5g, UBUNTU-CVE-2019-6472.