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CVE-2025-2704

Estado: ModificadaAlta (7.5)—

OpenVPN version 2.6.1 through 2.6.13 in server mode using TLS-crypt-v2 allows remote attackers to trigger a denial of service by corrupting and replaying network packets in the early handshake phase

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

OpenVPN expuesto en red sin autenticación previa (PR:N, UI:N) permite ataque remoto. Corrupción de paquetes en handshake causa negación de servicio en aplicación.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Openvpn — Openvpn

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-2704",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-2704",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-07T17:20:44.473236Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@openvpn.net",
      "affectedData": [
        {
          "vendor": "OpenVPN",
          "product": "OpenVPN",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.1",
              "versionType": "semver",
              "lessThanOrEqual": "2.6.13"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-04-02T21:15:32.943",
  "references": [
    {
      "url": "https://community.openvpn.net/openvpn/wiki/CVE-2025-2704",
      "tags": [
        "Broken Link"
      ],
      "source": "security@openvpn.net"
    },
    {
      "url": "https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00142.html",
      "source": "security@openvpn.net"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2025/04/02/5",
      "tags": [
        "Mailing List"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@openvpn.net",
      "description": [
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenVPN version 2.6.1 through 2.6.13 in server mode using TLS-crypt-v2 allows remote attackers to trigger a denial of service by corrupting and replaying network packets in the early handshake phase"
    },
    {
      "lang": "es",
      "value": "Las versiones 2.6.1 a 2.6.13 de OpenVPN en modo servidor que utilizan TLS-crypt-v2 permiten a atacantes remotos provocar una denegación de servicio al corromper y reproducir paquetes de red en la fase inicial del protocolo de enlace."
    }
  ],
  "lastModified": "2026-06-17T09:07:28.283",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2BC16851-89DA-4AFB-96D2-AAF258DCF5DC",
              "versionEndIncluding": "2.6.13",
              "versionStartIncluding": "2.6.1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@openvpn.net"
}