CVE-2019-19331

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Summary

CVECVE-2019-19331
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-12-16 16:15:00 UTC
Updated2019-12-17 14:14:00 UTC
Descriptionknot-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).

Risk And Classification

Problem Types: CWE-404

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 10.0 All All All
Application Nic Knot Resolver All All All All
Application Nic Knot Resolver All All All All

References

ReferenceSourceLinkTags
1779566 – (CVE-2019-19331) CVE-2019-19331 knot-resolver: DNS packets taking few seconds to process with full CPU utilization leads to DoS CONFIRM bugzilla.redhat.com Exploit, Issue Tracking, Patch
Knot Resolver 4.3.0 released – Knot Resolver MISC www.knot-resolver.cz Release Notes, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 501028 Alpine Linux Security Update for knot-resolver
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