{"id":"CVE-2020-12667","state":"PUBLISHED","title":"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 subdomai","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.","publishedAt":"2020-05-19T00:00:00.000Z","updatedAt":"2024-08-04T12:04:22.538Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/","https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html","http://www.openwall.com/lists/oss-security/2020/05/19/2","http://cyber-security-group.cs.tau.ac.il/#","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/","https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T19:46:27.697Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/12xxx/CVE-2020-12667.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-12667","state":"PUBLISHED","datePublished":"2020-05-19T00:00:00.000Z","dateUpdated":"2024-08-04T12:04:22.538Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2020-05-05T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an \"NXNSAttack\" issue. 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