CVE-2025-30194

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html
http://www.openwall.com/lists/oss-security/2025/04/29/1
https://www.vicarius.io/vsociety/posts/cve-2025-30194-detection-dnsdist-vulnerability
https://www.vicarius.io/vsociety/posts/cve-2025-30194-mitigate-dnsdist-vulnerability

Configurations

No configuration.

History

20 Jun 2025, 16:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-04-29 12:15

Updated : 2025-06-20 16:15

NVD link : CVE-2025-30194

Mitre link : CVE-2025-30194

CVE.ORG link : CVE-2025-30194

JSON object : View

Products Affected

No product.

CWE

CWE-416

Use After Free

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