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.
Published: 2025-09-18
Score: 3.7 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-30004 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.
Ubuntu USN Ubuntu USN USN-8037-1 DNSdist vulnerabilities
History

Tue, 04 Nov 2025 22:30:00 +0000

Type Values Removed Values Added
References

Thu, 18 Sep 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 18 Sep 2025 12:45:00 +0000

Type Values Removed Values Added
First Time appeared Powerdns
Powerdns dnsdist
Vendors & Products Powerdns
Powerdns dnsdist

Thu, 18 Sep 2025 09:30:00 +0000

Type Values Removed Values Added
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.
Title Denial of service via crafted DoH exchange in PowerDNS DNSdist
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Subscriptions

Powerdns Dnsdist
cve-icon MITRE

Status: PUBLISHED

Assigner: OX

Published:

Updated: 2025-11-04T21:09:56.609Z

Reserved: 2025-03-18T08:39:46.884Z

Link: CVE-2025-30187

cve-icon Vulnrichment

Updated: 2025-11-04T21:09:56.609Z

cve-icon NVD

Status : Deferred

Published: 2025-09-18T10:15:32.993

Modified: 2026-04-15T00:35:42.020

Link: CVE-2025-30187

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-09-18T12:41:01Z

Weaknesses