PowerDNS DNSdist fixes a high-severity vulnerability

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[TLP:CLEAR] PowerDNS DNSdist fixes a high-severity vulnerability

PowerDNS DNSdist fixes a high-severity vulnerability with version 1.9.9 [1].

PowerDNS DNSdist - DoS (CVE-2025-30194)

CVSS 7.5 (High)

An unauthenticated remote attacker can carry out a DoS attack on DNSdist by sending specially crafted DoH (DNS over HTTPS) requests. The vulnerability is exploitable only in configurations where DNSdist is set up to receive DoH requests via the nghttp2 library. If an immediate update to a fixed version is not possible, it is possible to temporarily switch from nghttp2 to h2o [1].

The vulnerability is present in product:

*:PowerDNS DNSdist;>=1.9.0,<=1.9.8;

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

More information:

CVE-2025-30194 at cve.org, NVD
CWE-416: Use After Free at cwe.mitre.org

The vulnerability was publicly disclosed 29. 4. 2025.

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[TLP:CLEAR] PowerDNS DNSdist fixes a high-severity vulnerability

PowerDNS DNSdist - DoS (CVE-2025-30194)

CVSS 7.5 (High)

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