high7.5
CVE-2019-19331
knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization.
Impact
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).
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Nic | Knot Resolver | before 4.3.0 |
| Debian | Debian Linux | Version 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- 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
- https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html