CVE-2019-6473 A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate
A malformed packet can cause the Kea DHCP server to crash, resulting in a denial of service for network clients.
- 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-2019-6473?
CVE-2019-6473 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
An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. 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-2019-6473?
It affects 1 product.
Products include Ics Kea.
How do I fix CVE-2019-6473?
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-2019-6473 being exploited?
There is no known exploitation of CVE-2019-6473 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2019-6473, DEBIAN-CVE-2019-6473, GHSA-5gvx-v2fm-q3fv, UBUNTU-CVE-2019-6473, USN-7759-1.