CVE-2025-30192

EUVD-2025-22089

21.07.2025, 13:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: 13.58%

Debian Releases

Debian Product

Codename

pdns-recursor

bookworm	vulnerable
bookworm (security)	vulnerable
bullseye	vulnerable
forky	5.4.5-1 fixed
sid	5.4.5-1 fixed
trixie	5.2.11-0+deb13u1 fixed
trixie (security)	5.2.13-0+deb13u1 fixed

Ubuntu Releases

Ubuntu Product

Codename

pdns-recursor

bionic	needs-triage
focal	needs-triage
jammy	needs-triage
noble	needs-triage
plucky	ignored
questing	ignored
resolute	needs-triage
xenial	needs-triage

Common Weakness Enumeration

CWE-345 - Insufficient Verification of Data Authenticity
The software does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

References

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