Published: 19/05/2020 Updated: 07/11/2023

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

VMScore: 445

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Knot Resolver prior to 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.

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nic knot resolver

Debian Bug report logs - #961076 NXNS Attack (CVE-2020-12667) Package: knot-resolver; Maintainer for knot-resolver is knot-resolver packagers <knot-resolver@packagesdebianorg>; Source for knot-resolver is src:knot-resolver (PTS, buildd, popcon) Reported by: danielbaumann@progress-linuxorg Date: Tue, 19 May 2020 20:21:0 ...

oss-sec mailing list archives   By Date By Thread </form>    [CVE-2020-12667] Knot Resolver 511 NXNSAttack mitigation   From: Petr � ...

CWE-400 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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961076 https://nvd.nist.gov

CVE-2020-12667

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