CVE-2020-12667

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductNic Knot Resolver

PublishedMay 19, 2020

First seenMay 19, 2020

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

nic knot_resolver5.1.1 or later

Vendor advisories

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

Affected products

Product	Affected versions	Fixed in
nic knot_resolver	v < 5.1.1	5.1.1

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.