CVE-2025-30192

A Recursor configured to send out ECS enabled queries can be sensitive to spoofing attempts

State: Published
Severity: 7.5 High
Published: Jul 21, 2025
Updated: Jul 21, 2025
Reserved: Mar 18, 2025

Description

An attacker spoofing answers to ECS enabled requests sent out by the Recursor has a chance of success higher than non-ECS enabled queries.

The updated version include various mitigations against spoofing attempts of ECS enabled queries by chaining ECS enabled requests and enforcing stricter validation of the received answers.

The most strict mitigation done when the new setting outgoing.edns_subnet_harden (old style name edns-subnet-harden) is enabled.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	OX

Weaknesses

CWE-345 Insufficient Verification of Data Authenticity

Affected Products

Product	Versions
RecursorPowerDNS	5.0.12Not affected 5.1.6Not affected 5.2.4Not affected

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2025-04.html

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