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CVE-2020-25829

7.5 · HIGH

An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5.

Published Oct 16, 2020EPSS 6.54%

Overview

CVE-2020-25829 is a high-severity vulnerability. It was published on October 16, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. A remote attacker can cause the cached records for a given name to be updated to the Bogus DNSSEC validation state, instead of their actual DNSSEC Secure state, via a DNS ANY query. This results in a denial of service for installation that always validate (dnssec=validate), and for clients requesting validation when on-demand validation is enabled (dnssec=process).

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2020-10/msg00036.htmlRefdocs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.htmlRefsecurity.gentoo.org/glsa/202012-19Reflists.opensuse.org/opensuse-security-announce/2020-10/msg00036.htmlRefdocs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.htmlRefsecurity.gentoo.org/glsa/202012-19

How CyberStrike helps

Frequently asked questions

What is CVE-2020-25829?

CVE-2020-25829 is a high-severity vulnerability. It was published on October 16, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-25829?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-25829?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-25829?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-25829 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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