CVE-2020-12667

Published: May 19, 2020Modified: Nov 21, 2024

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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.

Affected (1)

Products: Nic: Knot Resolver

Nic

1 product

Knot Resolver

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Nic Knot Resolver	Before 5.1.1

Related CWEs

CWE-400

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (12)

http://cyber-security-group.cs.tau.ac.il/#

Source: cve@mitre.org

Technical DescriptionThird Party Advisory

http://www.openwall.com/lists/oss-security/2020/05/19/2

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/

Source: cve@mitre.org

Technical DescriptionVendor Advisory

https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/76Y4FITMOH6RVPWAANGV7NB2ZHPJJGDQ/

Source: cve@mitre.org

https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html

Source: cve@mitre.org

Release NotesVendor Advisory

http://cyber-security-group.cs.tau.ac.il/#