CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2019-19331
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).
Severity
- EPSS
- 2.1% chance of exploitation in the next 30 days; higher than 81% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-404, CWE-407
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- nic:knot_resolver
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331
- https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
- https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331
- https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html