CVE-2019-19331

high

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).

References

https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html

https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331

Details

Source: Mitre, NVD

Published: 2019-12-16

Updated: 2024-04-26

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High