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.

Vulnerability/
CVE-2024-25581

high

7.5

CWE

13/5/2024

13/2/2025

CVE-2024-25581: Transfer requests received over DoH can lead to a denial of service in DNSdist

First published: Mon May 13 2024(Updated: )

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.

Credit: security@open-xchange.com

Affected Software	Affected Version	How to fix
PowerDNS

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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.

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