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 v3
7.5
EPSS
0.0005
EPSS Percentile
14.9%
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