CVE-2019-19331

State: Published
Severity: 7.5 High
Published: Dec 16, 2019
Updated: Aug 5, 2024
Reserved: Nov 27, 2019

Description

knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).

Scores

CVSS	Score	Vector	Source
3.0	7.5 High	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat

Weaknesses

CWE-407

Affected Products

Product	Versions
knot-resolverCZ.NIC	4.3.0Affected

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331
https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html
[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security updatemailing-list

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