CVE-2025-30194
DNSdist DoH Double-Free Denial of Service
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.
INFO
Published Date :
April 29, 2025, 12:15 p.m.
Last Modified :
April 29, 2025, 2:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-30194.
| URL | Resource |
|---|---|
| https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html | |
| http://www.openwall.com/lists/oss-security/2025/04/29/1 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-30194 vulnerability anywhere in the article.
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Cyber Security News
PowerDNS DNSdist Vulnerability Let Attackers Cause Denial of Service Condition
A high-severity vulnerability (CVE-2025-30194) in PowerDNS DNSdist, a widely used DNS load balancer and security tool, enables remote attackers to trigger denial-of-service (DoS) conditions by exploit ... Read more
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Cyber Security News
CISA Warns SAP 0-day Vulnerability Exploited in the Wild
CISA has added a critical SAP NetWeaver vulnerability to its Known Exploited Vulnerabilities (KEV) catalog on April 29, 2025. The zero-day flaw, tracked as CVE-2025-31324, carries a maximum CVSS score ... Read more
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Daily CyberSecurity
High-Severity DoS Vulnerability Found in PowerDNS DNSdist (CVE-2025-30194)
The PowerDNS team has issued a high-severity security advisory—CVE-2025-30194—regarding a newly discovered denial-of-service (DoS) vulnerability in DNSdist, the company’s DNS load balancer. The flaw a ... Read more
The following table lists the changes that have been made to the
CVE-2025-30194 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Apr. 29, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/04/29/1 -
New CVE Received by [email protected]
Apr. 29, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-416 Added Reference https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-30194 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-30194
weaknesses.