CVE-2025-30192

HIGH

PowerDNS Recursor - DNS Cache Poisoning via ECS Query Spoofing

Title source: llm

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.

References (1)

Core 1

Core References

Various Sources

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

Scores

CVSS v3 7.5

EPSS 0.0022

EPSS Percentile 12.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-345

Status published

Products (3)

PowerDNS/Recursor 5.0.12

PowerDNS/Recursor 5.1.6

PowerDNS/Recursor 5.2.4

Published Jul 21, 2025

Tracked Since Feb 18, 2026