CVE-2020-12667

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2020-12667
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-05-19 13:15:00 UTC
Updated2023-11-07 03:15:00 UTC
DescriptionKnot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.

Risk And Classification

Problem Types: CWE-400

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Nic Knot Resolver All All All All
Application Nic Knot Resolver All All All All

References

ReferenceSourceLinkTags
[SECURITY] Fedora 32 Update: knot-resolver-5.1.1-1.fc32 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
[SECURITY] Fedora 32 Update: knot-resolver-5.1.1-1.fc32 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
NXNSAttack MISC cyber-security-group.cs.tau.ac.il Technical Description, Third Party Advisory
NXNSAttack: upgrade resolvers to stop new kind of random subdomain attack | The CZ.NIC Staff Blog MISC en.blog.nic.cz Technical Description, Vendor Advisory
Knot Resolver 5.1.1 released – Knot Resolver CONFIRM www.knot-resolver.cz Release Notes, Vendor Advisory
oss-security - [CVE-2020-12667] Knot Resolver 5.1.1 NXNSAttack mitigation MLIST www.openwall.com Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 501029 Alpine Linux Security Update for knot-resolver
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

CVE.report and Source URL Uptime Status status.cve.report