CVEvulnerability
CVE-2025-30194
7.5 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2025-04-29
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-416
Description
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.
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html dnsdist.org
- http://www.openwall.com/lists/oss-security/2025/04/29/1 www.openwall.com
- https://www.vicarius.io/vsociety/posts/cve-2025-30194-detection-dnsdist-vulnerability www.vicarius.io
- https://www.vicarius.io/vsociety/posts/cve-2025-30194-mitigate-dnsdist-vulnerability www.vicarius.io