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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2025-30194)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:01743-1 advisory.

    Update to version 1.9.10.

    - CVE-2025-30194: illegal memory access (double-free) when processing specially crafted DoH exchanges     leads to a       denial-of-service (bsc#1242028).
    - CVE-2025-30193: stack exhaustion when processing too many queries on incoming TCP connections leads to a       denial-of-service (bsc#1243378).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-1d6a5aa3d8 advisory.

    Update to 1.9.9 to fix CVE-2025-30194

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
257296	Linux Distros Unpatched Vulnerability : CVE-2025-30194	Nessus	Misc.	high
237540	SUSE SLED15 / SLES15 Security Update : dnsdist (SUSE-SU-2025:01743-1)	Nessus	SuSE Local Security Checks	high
236793	Fedora 41 : dnsdist (2025-1d6a5aa3d8)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2025-30194

high

Tenable Plugins

high

high

high