VULNERABILITY INTELLIGENCE
CVE-2020-12667
CVSS score7.5 HIGH
EPSS probability2.61%
CISA KEVNot currently listed
Published2020-05-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
Knot 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.
Weakness classification
- nvd@nist.gov: CWE-400
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-400
Primary references
- cve@mitre.org — Technical Description, Third Party Advisory
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Technical Description, Vendor Advisory
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org — Release Notes, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Technical Description, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Technical Description, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory