National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2020-12667 Detail

Current 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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://cyber-security-group.cs.tau.ac.il/# Technical Description Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/05/19/2 Mailing List Third Party Advisory
https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/ Technical Description Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/
https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html Release Notes Vendor Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
5.1.1


Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-12667
NVD Published Date:
05/19/2020
NVD Last Modified:
05/28/2020