When was CVE-2020-12667 disclosed?

CVE-2020-12667 was first published in the National Vulnerability Database on May 19, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-12667 actively exploited?

CVE-2020-12667 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-12667?

CVE-2020-12667 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2020-12667?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-12667, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

CVE-2020-12667

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 77.6%
KEV: Not listed

References (12)

cve@mitrehttp://cyber-security-group.cs.tau.ac.il/#
cve@mitrehttp://www.openwall.com/lists/oss-security/2020/05/19/2
cve@mitrehttps://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/
cve@mitrehttps://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/
cve@mitrehttps://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html
af854a3a-2127-422b-91ae-364da2661108http://cyber-security-group.cs.tau.ac.il/#
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/05/19/2
af854a3a-2127-422b-91ae-364da2661108https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/
af854a3a-2127-422b-91ae-364da2661108https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html

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CVE-2020-12667

Published

Last Modified

References (12)

Weakness Classification(1)

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-12667?

Same CWE

CVE-2020-12667

📅 Published

🔄 Last Modified

🔗 References (12)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-12667?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (12)

Frequently asked(5)

Related CVEs(same CWE)