CVE-2020-12667

CVSS 7.5 HIGHEPSS 2.6%CWE-400

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.5EPSS 2.6%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

19 May 2020Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

n/a · n/a

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References

http://cyber-security-group.cs.tau.ac.il/#https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/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