What is CVE-2018-1110?

CVE-2018-1110 is a high-severity vulnerability in Nic Knot Resolver, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-03-30.

How severe is CVE-2018-1110?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Nic Knot Resolver

CVE-2018-1110

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

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2021-03-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Nic Knot Resolver
Knot-Resolver — versions Knot Resolver 2.3.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
www.knot-resolver.cz/2018-04-23-knot-resolver-2.3.0.html (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2018-1110?: CVE-2018-1110 is a high-severity vulnerability in Nic Knot Resolver, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-03-30.
How severe is CVE-2018-1110?: High severity. CVSS v3 base score is 7.5 out of 10.