Description
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)
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Rakuten Viber | Rakuten Viber Cloak - Android | 25.7.2.0g – < 27.2.0.0g | 27.2.0.0g |
| Rakuten Viber | Rakuten Viber Cloak - Windows | v25.6.0.0 – < v27.3.0.0 | v27.3.0.0 |