Published: 16/12/2019 Updated: 26/04/2024

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

VMScore: 445

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

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).

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nic knot resolver
debian debian linux 10.0

Debian Bug report logs - #946181 knot-resolver: CVE-2019-19331 Package: src:knot-resolver; Maintainer for src:knot-resolver is knot-resolver packagers <knot-resolver@packagesdebianorg>; Reported by: Salvatore Bonaccorso <carnil@debianorg> Date: Wed, 4 Dec 2019 21:18:05 UTC Severity: grave Tags: security, upstream ...

Hello everyone, here are some details on the vulnerability (fix) disclosed today Impact ====== Some DNS packets might take even a few seconds to process with full CPU utilization, allowing DoS Unembargo date ============== Wednesday 4th December 2019, afternoon GMT Fixes ===== Most of the issue can be mitigated by updating libknot dependency t ...

CWE-404 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 https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html https://nvd.nist.gov https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=946181

CVE-2019-19331

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