Vulnerability Details

Knot Resolver < 5.1.1 NXNSAttack Vulnerability

Published: 2020-05-20 03:16:44
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Detection Type:
Executable Unreliable

Solution Type:
Vendor Patch

Summary:
Knot Resolver is prone to a denial of service vulnerability (NXNSAttack).

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
Knot Resolver 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 Versions:
Knot Resolver prior to version 5.1.1.

Recommendations:
Update to version 5.1.1 or later.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2020-12667

CVE Analysis

https://www.mageni.net/cve/CVE-2020-12667

References:

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

Severity
High
CVSS Score
7.8
Published
2020-05-20
Modified
2020-05-20
Category
Denial of Service

You never have to pay for a vulnerability scanning and management software again.

Tired of paying a subscription 'per asset' or 'per IP'? Well you can officially cancel your current subscription. Mageni provides a free, open source and enterprise-ready vulnerability scanning and management platform which helps you to find, prioritize, remediate and manage your vulnerabilities. It is free and always will be.