CVE-2024-25581 Transfer requests received over DoH can lead to a denial of service in DNSdist
An attacker can cause a denial of service in DNSdist by sending zone transfer requests over DNS over HTTPS when specific non-default configurations are enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-25581?
CVE-2024-25581 is a high-severity denial of service vulnerability in PowerDNS DNSdist, published on 13 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-20
Which versions are affected by CVE-2024-25581?
Linux distribution packages (1)
dnsdist openSUSE:Tumbleweed | All versions | 1.9.4-1.1 |
How do I fix CVE-2024-25581?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-25581 being exploited?
There is no known exploitation of CVE-2024-25581 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2024-OD86351, DEBIAN-CVE-2024-25581, GHSA-55g9-rgmx-hvww, openSUSE-SU-2024:13958-1.