CVE-2025-30193
HIGH EPSS 42.6%
Published May 20, 20251y ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
Published May 20, 2025 1y ago
Last Modified Jun 17, 2026 1w ago
Description
In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attacker can cause a denial of service by crafting a TCP exchange that triggers an exhaustion of the stack and a crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.10 version. A workaround is to restrict the maximum number of queries on incoming TCP connections to a safe value, like 50, via the setMaxTCPQueriesPerConnection setting. We would like to thank Renaud Allard for bringing this issue to our attention.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
42.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-674
References 1
- dnsdist.org https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.