CVE-2024-25581: Transfer requests received over DoH can lead to a denial of service in DNSdist
When incoming DNS over HTTPS support is enabled using the nghttp2 provider, and queries are routed to a tcp-only or DNS over TLS backend, an attacker can trigger an assertion failure in DNSdist by sending a request for a zone transfer (AXFR or IXFR) over DNS over HTTPS, causing the process to stop and thus leading to a Denial of Service. DNS over HTTPS is not enabled by default, and backends are using plain DNS (Do53) by default.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2024-25581?
CVE-2024-25581 is classified as a vulnerability that could lead to denial of service due to an assertion failure in DNSdist.
How do I fix CVE-2024-25581?
To fix CVE-2024-25581, ensure that incoming DNS over HTTPS support is properly configured and restricting requests for zone transfers.
What software is affected by CVE-2024-25581?
CVE-2024-25581 affects PowerDNS DNSdist when using the nghttp2 provider.
Can CVE-2024-25581 be exploited remotely?
Yes, an attacker can exploit CVE-2024-25581 remotely by sending specially crafted requests.
What are the potential impacts of CVE-2024-25581?
The potential impacts of CVE-2024-25581 include service disruption and crashes of the DNSdist service.