Vulnerability 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).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nic | Knot Resolver | < 4.3.0 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331ExploitIssue TrackingPatch
- https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
- https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.htmlRelease NotesVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331ExploitIssue TrackingPatch
- https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
- https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.htmlRelease NotesVendor Advisory
FAQ
What is CVE-2019-19331?
CVE-2019-19331 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2019-19331?
CVE-2019-19331 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-19331?
Check the references section above for vendor advisories and patch information. Affected products include: Nic Knot Resolver, Debian Debian Linux.