Security advisory

{
  "id": "56374f202b839bbecc4e33044f5118a4ef0b8f853cfd40a08b790c2e25d1868e",
  "url": "https://osv.dev/vulnerability/CVE-2024-56946",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2024-56946",
    "summary": "Denial of service in DNS-over-QUIC in Technitium DNS Server <= v13.2.2 allows remote attackers to permanently stop the server from accepting new DNS-over-QUIC connections by triggering unhandled exceptions in listener threads.",
    "evidence": "osv:CVE-2024-56946",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-56946",
      "aliases": [
        "CVE-2024-56946"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/technitiumsoftware/dnsserver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "fcd631b81ba366c7d3e443b8f8103f29a90ea3fe"
                },
                {
                  "fixed": "a7d1cfb6e836798ef9171677bf8919cf99d9dcb0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:technitium:dnsserver:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "13.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a7d1cfb6e836798ef9171677bf8919cf99d9dcb0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v13.2.2",
            "v13.2.1",
            "v13.2",
            "v13.1.1",
            "v13.1",
            "v13.0.2",
            "v12.2.1",
            "v12.2",
            "v12.1",
            "v12.0.1",
            "v12.0",
            "v11.5.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56946.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.430177502Z",
      "provider": "osv",
      "references": [
        "https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-133",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56946.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-56946",
        "https://github.com/TechnitiumSoftware/DnsServer/commit/a7d1cfb6e836798ef9171677bf8919cf99d9dcb0"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56946.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-56946",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517828,
  "published_at": "2025-02-03T00:00:00+00:00"
}