CVE-2025-30194 — Denial of service via crafted DoH exchange

Description (CNA)

When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.

Affected (CNA)

Vendor / product	Versions
PowerDNS / DNSdist	affected 1.9.0 before 1.9.9

CWE

CWE-416

References

https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2025/04/29/1
https://www.vicarius.io/vsociety/posts/cve-2025-30194-detection-dnsdist-vulnerability
https://www.vicarius.io/vsociety/posts/cve-2025-30194-mitigate-dnsdist-vulnerability

CISA-ADP

No English description supplied.

No references supplied.