CVE-2018-1110 Denial of service in knot-resolver

High 7.5 Published 30 Mar 2021 Updated 5 Aug 2024

Attackers can cause denial of service in Knot Resolver by sending malformed DNS messages, affecting DNS infrastructure availability.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-1110?

CVE-2018-1110 is a high-severity denial of service vulnerability in knot-resolver, published on 30 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in knot-resolver before version 2.3.0. Malformed DNS messages may cause denial of service.

Weakness: CWE-20

Which versions are affected by CVE-2018-1110?

It affects 1 product.

Products include Nic Knot Resolver.

How do I fix CVE-2018-1110?

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-2018-1110 being exploited?

There is no known exploitation of CVE-2018-1110 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2018-1110, GHSA-gv92-3p38-6rrw, UBUNTU-CVE-2018-1110.