« Volver al listado

CVE-2025-13476

Estado: AnalizadaCrítica (9.8)—

Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0–v25.8.1.0 uses a static and predictable TLS ClientHello fingerprint lacking extension diversity, allowing Deep Packet Inspection (DPI) systems to trivially identify and block proxy traffic, undermining censorship circumvention. (CWE-327)

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.

Vector CVSS AV:N/AC:L/PR:N/UI:N sugiere exposición en red remota (T1190). DPI identifica tráfico proxy predecible (T1090), permitiendo bloqueo e interceptación de comunicaciones (T1565.001: manipulación de tráfico en tránsito).

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

Tecnologías afectadas (1)

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-13476",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-13476",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-06T10:34:45.858741Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cret@cert.org",
      "affectedData": [
        {
          "vendor": "Rakuten Viber",
          "product": "Rakuten Viber Cloak - Android",
          "versions": [
            {
              "status": "affected",
              "version": "25.7.2.0g",
              "lessThan": "27.2.0.0g",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Rakuten Viber",
          "product": "Rakuten Viber Cloak - Windows",
          "versions": [
            {
              "status": "affected",
              "version": "v25.6.0.0",
              "lessThan": "v27.3.0.0",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-03-05T19:15:58.283",
  "references": [
    {
      "url": "https://www.viber.com/en/download/",
      "tags": [
        "Product"
      ],
      "source": "cret@cert.org"
    },
    {
      "url": "https://www.kb.cert.org/vuls/id/772695",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-327"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0–v25.8.1.0 uses a static and predictable TLS ClientHello fingerprint lacking extension diversity, allowing Deep Packet Inspection (DPI) systems to trivially identify and block proxy traffic, undermining censorship circumvention. (CWE-327)"
    },
    {
      "lang": "es",
      "value": "El modo Cloak de Rakuten Viber en Android v25.7.2.0g y Windows v25.6.0.0–v25.8.1.0 utiliza una huella digital TLS ClientHello estática y predecible que carece de diversidad de extensiones, lo que permite a los sistemas de Inspección Profunda de Paquetes (DPI) identificar y bloquear trivialmente el tráfico de proxy, socavando la elusión de la censura. (CWE-327)"
    }
  ],
  "lastModified": "2026-06-17T08:34:12.950",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rakuten:viber:*:*:*:*:*:windows:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F75AF4DA-3BBA-44F1-80FA-6FF49AB18C20",
              "versionEndIncluding": "25.8.1.0",
              "versionStartIncluding": "25.6.0"
            },
            {
              "criteria": "cpe:2.3:a:rakuten:viber:9.3.0.6:25.7.2.0g:*:*:*:android:*:*",
              "vulnerable": true,
              "matchCriteriaId": "758AEEB0-8E18-48D2-A8A5-662BAAE54CFF"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cret@cert.org"
}