Bug 2382334 (CVE-2025-30192)

Summary: CVE-2025-30192 pdns-recursor: A Recursor configured to send out ECS enabled queries can be sensitive to spoofing attempts
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A denial of service flaw haws been discovered in powerdns. An attacker spoofing answers to ECS enabled requests sent out by the Recursor has a higher chance of success than non-ECS enabled queries.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2382364, 2382365, 2382366, 2382367    
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Description OSIDB Bzimport 2025-07-21 13:01:30 UTC 
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.