CVE-2020-12667
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 2.6%
exploitation probability
2.6%top 15% of all CVEs
observed exploitation
nono source reports it
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/aReferences
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.htmlhttps://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.htmlhttp://www.openwall.com/lists/oss-security/2020/05/19/2