CVE-2025-61430

{
  "id": "CVE-2025-61430",
  "sourceIdentifier": "[email protected]",
  "published": "2025-10-24T15:15:40.703",
  "lastModified": "2026-11-05T22:10:00.203",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper handling of DNS over TCP in Simple DNS Plus v9 allows a remote attacker with querying access to the DNS server to cause the server to return request payloads from other clients. This happens when the TCP length prefix is malformed (len differs from actual packet len), and due to a concurrency/buffering issue, even when the lengths match. A length prefix that is smaller than the actual packet size increases information leakage. In summary, this vulnerability allows an attacker to see DNS queries of other clients."
    },
    {
      "lang": "es",
      "value": "El manejo inadecuado de DNS sobre TCP en Simple DNS Plus v9 permite a un atacante remoto con acceso de consulta al servidor DNS hacer que el servidor devuelva cargas útiles de solicitud de otros clientes. Esto ocurre cuando el prefijo de longitud TCP está malformado (la longitud difiere de la longitud real del paquete), y debido a un problema de concurrencia/almacenamiento en búfer, incluso cuando las longitudes coinciden. Un prefijo de longitud que es más pequeño que el tamaño real del paquete aumenta la fuga de información. En resumen, esta vulnerabilidad permite a un atacante ver las consultas DNS de otros clientes."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "version": "n/a",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2025-10-24T16:31:35.720723Z",
          "id": "CVE-2025-61430",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-350"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://ma-personal.notion.site/simpledns-vuln?source=copy_link",
      "source": "[email protected]"
    },
    {
      "url": "https://www.incognitotgt.me/blog/simpledns-vuln",
      "source": "[email protected]"
    }
  ]
}