CVE-2022-40188

HIGH

NIC Knot Resolver < 5.5.3 - Denial of Service

Title source: rule

Description

Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address sets.

References (5)

[Release Notes, Third Party Advisory] https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1343#note_262558

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2VE5K3VDUHJOIA2IGT3G5R76IBADMNE/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIMDNIUI7GTUEKIBBYYW7OCTJQFPDNXL/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XO6LIVQS62MI5GG4OVYB5RHVZMYNHAHG/

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2022/10/msg00008.html

Scores

CVSS v3 7.5

EPSS 0.0047

EPSS Percentile 64.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-407

Status published

Products (5)

debian/debian_linux 10.0

fedoraproject/fedora 35

fedoraproject/fedora 36

fedoraproject/fedora 37

nic/knot_resolver < 5.5.3

Published Sep 23, 2022

Tracked Since Feb 18, 2026