Vulnerability · Published May 13, 2024 · Assigned by OX
CVE-2024-25581Transfer requests received over DoH can lead to a denial of service in DNSdist
High 7.5
In plain English
A high-severity improper input validation in DNSdist from PowerDNS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | dnsdist | 1.9.4-r0 | ALPINE-CVE-2024-25581 |
| Alpine:v3.21 | dnsdist | 1.9.4-r0 | ALPINE-CVE-2024-25581 |
| Alpine:v3.22 | dnsdist | 1.9.4-r0 | ALPINE-CVE-2024-25581 |
| Alpine:v3.23 | dnsdist | 1.9.4-r0 | ALPINE-CVE-2024-25581 |
| Alpine:v3.24 | dnsdist | 1.9.4-r0 | ALPINE-CVE-2024-25581 |
| Debian:13 | dnsdist | 1.9.4-1 | DEBIAN-CVE-2024-25581 |
| Debian:14 | dnsdist | 1.9.4-1 | DEBIAN-CVE-2024-25581 |
Affected products (as reported)
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H