Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2021-21387— Partial secret key disclosure, improper safety number calculation, & inadequate encryption strength

Quick assessment

Affected
parabirb wrongthink
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 8.1 · High EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-21387

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Partial secret key disclosure, improper safety number calculation, & inadequate encryption strength
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
parabirb wrongthink >= 2.0.0, < 2.2.0 -

II. Public POCs for CVE-2021-21387

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-21387

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-21387 (1)

IV. Related Vulnerabilities

Same product: wrongthink
Same weakness: CWE-319

V. Comments for CVE-2021-21387

No comments yet

Leave a comment