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CVE-2021-23127— [20210301] - Core - Insecure randomness within 2FA secret generation

Quick assessment

Affected
Joomla! Project Joomla! CMS
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.

Joomla是美国Open Source Matters团队的一套使用PHP和MySQL开发的开源、跨平台的内容管理系统(CMS)。 Joomla Core 存在安全漏洞，该漏洞源于对2FA秘密共享使用的长度不足。

AI Predicted 5.3 Difficulty: Moderate EPSS 1.33% · P69

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2021-23127

Vulnerability Information
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Vulnerability Title
[20210301] - Core - Insecure randomness within 2FA secret generation
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Joomla! 3.2.0 through 3.9.24. Usage of an insufficient length for the 2FA secret accoring to RFC 4226 of 10 bytes vs 20 bytes.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Joomla 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Joomla是美国Open Source Matters团队的一套使用PHP和MySQL开发的开源、跨平台的内容管理系统(CMS)。 Joomla Core 存在安全漏洞，该漏洞源于对2FA秘密共享使用的长度不足。
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
Joomla! Project Joomla! CMS 3.2.0-3.9.24 -

II. Public POCs for CVE-2021-23127

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-23127

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Other References for CVE-2021-23127 (1)

Same Patch Batch · Joomla! Project · 2021-03-04 · 10 CVEs total

CVE-2021-23129 [20210303] - Core - XSS within alert messages showed to users
CVE-2021-23130 [20210304] - Core - XSS within the feed parser library
CVE-2021-23131 [20210305] - Core - Input validation within the template manager
CVE-2021-23132 [20210306] - Core - com_media allowed paths that are not intended for image uploads
CVE-2021-26027 [20210307] - Core - ACL violation within com_content frontend editing
CVE-2021-26028 [20210308] - Core - Path Traversal within joomla/archive zip class
CVE-2021-26029 [20210309] - Core - Inadequate filtering of form contents could allow to overwrite the aut
CVE-2021-23126 [20210301] - Core - Insecure randomness within 2FA secret generation
CVE-2021-23128 [20210302] - Core - Potential Insecure FOFEncryptRandval

IV. Related Vulnerabilities

Same product: Joomla! CMS
Same vendor: Joomla! Project

V. Comments for CVE-2021-23127

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