CVE-2025-30187
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2025-09-18
Last updated on: 2025-11-04
Assigner: Open-Xchange
Description
Description
In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchange that triggers an unbounded I/O read loop, causing an unexpected consumption of CPU resources.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| powerdns | dnsdist | 1.9.0 |
| powerdns | dnsdist | 1.9.10 |
| powerdns | dnsdist | 2.0.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-835 | The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability occurs in DNSdist when it is configured to use the nghttp2 library for processing DNS over HTTPS (DoH) queries. An attacker can craft a specially designed DoH exchange that triggers an unbounded input/output read loop, which leads to excessive CPU usage and causes a denial of service.
How can this vulnerability impact me? :
The vulnerability can cause a denial of service by consuming excessive CPU resources on the affected system, potentially making the DNSdist service unavailable or degraded in performance.
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