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CVE-2021-3689— Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2

Quick assessment

Affected
yiisoft yiisoft/yii2
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.

yii2是一个快速、安全和专业的PHP框架。 yii2存在安全漏洞，该漏洞源于yii2易受随机数生成器中可预测算法的影响

AI Predicted 5.3 Difficulty: Hard EPSS 1.90% · P79

Possible ATT&CK Techniques 1 AI

T1608 · Stage Capabilities
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I. Basic Information for CVE-2021-3689

Vulnerability Information
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Vulnerability Title
Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2
Source: CVE Program / CVE List V5
Vulnerability Description
yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1241
Source: CVE Program / CVE List V5
Vulnerability Title
yii2 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
yii2是一个快速、安全和专业的PHP框架。 yii2存在安全漏洞，该漏洞源于yii2易受随机数生成器中可预测算法的影响
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
yiisoft yiisoft/yii2 unspecified ~ 2.0.42.1 -

II. Public POCs for CVE-2021-3689

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-3689

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Patches & Fixes for CVE-2021-3689 (1)

Vendor Advisories for CVE-2021-3689 (1)

IV. Related Vulnerabilities

Same product: yiisoft/yii2
Same vendor: yiisoft
Same weakness: CWE-1241

V. Comments for CVE-2021-3689

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