CVE-2025-30193 Affecting dnsdist package, versions <1.9.10-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.05% (17th percentile)

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  • Snyk IDSNYK-DEBIAN14-DNSDIST-11740495
  • published10 Aug 2025
  • disclosed20 May 2025

Introduced: 20 May 2025

CVE-2025-30193  (opens in a new tab)

How to fix?

Upgrade Debian:14 dnsdist to version 1.9.10-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dnsdist package and not the dnsdist package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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 Base Scores

version 3.1