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CVE-2025-30194

Denial of service via crafted DoH exchange

Published: Apr 29, 2025Updated: Jun 20, 2025 Sources: CVE List NVD BDUCWE-416
NVD MITRE
7.5CVSSHIGH
EPSS Score
2.0%
Top 22.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-416

Affected Products

PowerDNS DNSdistPowerDNS.COM BV
On-prem
Networking Infrastructure / dns-dhcp-ntp
DNSdistPowerDNS
On-prem
Networking Infrastructure / dns-dhcp-ntp
powerdns.com bvcommercialNLNetworking Infrastructureaka powerdns
powerdnsoss-projectDKNetworking Infrastructureaka powerdns recursor, powerdns authoritative, dnsdist

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html
dnsdist.org
http://www.openwall.com/lists/oss-security/2025/04/29/1
openwall.com
https://www.vicarius.io/vsociety/posts/cve-2025-30194-detection-dnsdist-vulnerability
vicarius.io
and 1 more references View all →

Timeline

Published
Apr 29, 2025
Last Updated
Jun 20, 2025

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