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I. Basic Information for CVE-2021-21387
Vulnerability Information

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Vulnerability Title
Partial secret key disclosure, improper safety number calculation, & inadequate encryption strength
Source: NVD (National Vulnerability Database)
Vulnerability Description
Wrongthink peer-to-peer, end-to-end encrypted messenger with PeerJS and Axolotl ratchet. In wrongthink from version 2.0.0 and before 2.3.0 there was a set of vulnerabilities causing inadequate encryption strength. Part of the secret identity key was disclosed by the fingerprint used for connection. Additionally, the safety number was improperly calculated. It was computed using part of one of the public identity keys instead of being derived from both public identity keys. This caused issues in computing safety numbers which would potentially be exploitable in the real world. Additionally there was inadequate encryption strength due to use of 1024-bit DSA keys. These issues are all fixed in version 2.3.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
敏感数据的明文传输
Source: NVD (National Vulnerability Database)
Vulnerability Title
Parabirb wrongthink 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Parabirb wrongthink是 (Parabirb)开源的一个应用程序。提供一个端到端加密功能。 wrongthink from version 2.0.0 and before 2.3.0 存在安全漏洞,该漏洞源于部分秘密身份密钥通过用于连接的指纹被公开。
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
VendorProductAffected VersionsCPESubscribe
parabirbwrongthink >= 2.0.0, < 2.2.0 -
II. Public POCs for CVE-2021-21387
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III. Intelligence Information for CVE-2021-21387
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IV. Related Vulnerabilities
V. Comments for CVE-2021-21387

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