CVE-2025-13476— Rakuten Viber uses broken or risky cryptographic Algorithm
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I. Basic Information for CVE-2025-13476
Vulnerability Information
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Vulnerability Title
Rakuten Viber uses broken or risky cryptographic Algorithm
Source: NVD (National Vulnerability Database)
Vulnerability 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)
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Rakuten Viber Desktop 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rakuten Viber Desktop是卢森堡Viber公司的一款即时通讯软件。 Rakuten Viber Desktop存在安全漏洞，该漏洞源于使用静态且可预测的TLS ClientHello指纹，可能导致代理流量被识别和阻止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Rakuten Viber | Rakuten Viber Cloak - Android | 25.7.2.0g ~ 27.2.0.0g | - | |
| Rakuten Viber | Rakuten Viber Cloak - Windows | v25.6.0.0 ~ v27.3.0.0 | - |
II. Public POCs for CVE-2025-13476
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|---|
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