CVE-2025-30194
Denial of service via crafted DoH exchange
Summary
Denial of service via crafted DoH exchange
Original description
The description as published by the source.
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.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2025-30194 dnsdist Fixed in: 1.9.9-1
References
- advisory dnsdist.org
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- web openwall.com
- web repo.powerdns.com
- web vicarius.io
- web vicarius.io