CVE-2025-30194
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductDNSdist
PublishedApr 29, 2025
First seenApr 29, 2025
Weakness typeCWE-416Use after free
How to fix
Update
- PowerDNS DNSdist1.9.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| PowerDNS DNSdist | 1.9.0 ≤ v < 1.9.9 | 1.9.9 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.