CVE-2025-13476

{"id": "CVE-2025-13476", "cveTags": [], "metrics": {"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}]}, "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\u2013v25.8.1.0 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\u2013v25.8.1.0 utiliza una huella digital TLS ClientHello est\u00e1tica y predecible que carece de diversidad de extensiones, lo que permite a los sistemas de Inspecci\u00f3n Profunda de Paquetes (DPI) identificar y bloquear trivialmente el tr\u00e1fico de proxy, socavando la elusi\u00f3n de la censura. (CWE-327)"}], "lastModified": "2026-03-10T19:49:55.930", "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"}