CVE-2025-13476
CriticalSummary
Tryb Cloak aplikacji Rakuten Viber w wersji Android v25.7.2.0g oraz Windows v25.6.0.0–v25.8.1.0 wykorzystuje statyczny i przewidywalny odcisk palca TLS ClientHello, który nie zapewnia różnorodności rozszerzeń. To umożliwia systemom Deep Packet Inspection (DPI) łatwe identyfikowanie i blokowanie ruchu proxy, co podważa możliwości omijania cenzury.
Risk Assessment
Organizacje mogą być narażone na blokowanie ruchu proxy, co ogranicza ich zdolność do omijania cenzury i może prowadzić do utraty prywatności użytkowników.
Recommendation
Zaleca się aktualizację aplikacji Viber do najnowszej wersji, aby zminimalizować ryzyko związane z identyfikacją i blokowaniem ruchu przez systemy DPI.
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Original NVD description (English source)
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)
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

