CVE-2025-30193
Fixed in a distro release EPSS <1%CVSS 7.5
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.
Products: powerdns dnsdist
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | dnsdist | no fix |
| Debian 13 | dnsdist | 1.9.10-1 |
| Debian 14 | dnsdist | 1.9.10-1 |
| SUSE Enterprise Storage 7.1 | dnsdist | 1.8.0-150100.3.8.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | dnsdist | 1.9.10-150700.3.3.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | dnsdist | 1.8.0-150100.3.8.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Manager Proxy 4.3 | dnsdist | 1.8.0-150400.9.6.1 |
| SUSE Manager Server 4.3 | dnsdist | 1.8.0-150400.9.6.1 |
| Ubuntu 25.10 | dnsdist | 1.9.10-1ubuntu0.1 |
| Ubuntu Pro 22.04 LTS | dnsdist | 1.6.1-1ubuntu0.1~esm2 |
| Ubuntu Pro 24.04 LTS | dnsdist | 1.8.3-2ubuntu0.1~esm1 |
| openSUSE Leap 15.6 | dnsdist | 1.8.0-150400.9.6.1 |