CVE-2021-4240— phpservermon User.php generatePasswordResetToken predictable algorithm in random number generator
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I. Basic Information for CVE-2021-4240
Vulnerability Information
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Vulnerability Title
phpservermon User.php generatePasswordResetToken predictable algorithm in random number generator
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability, which was classified as problematic, was found in phpservermon. This affects the function generatePasswordResetToken of the file src/psm/Service/User.php. The manipulation leads to use of predictable algorithm in random number generator. The exploit has been disclosed to the public and may be used. The name of the patch is 3daa804d5f56c55b3ae13bfac368bb84ec632193. It is recommended to apply a patch to fix this issue. The identifier VDB-213717 was assigned to this vulnerability.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息熵不充分
Source: NVD (National Vulnerability Database)
Vulnerability Title
phpservermon 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
phpservermon是一个脚本，用于检查您的网站和服务器是否已启动并正在运行。 phpservermon存在安全漏洞，该漏洞源于其src/psm/Service/User.php组件的generatePasswordResetToken函数导致随机数发生器采用可预测算法。该攻击方法已经被公开，存在被利用的风险。
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 |
|---|---|---|---|---|
| unspecified | phpservermon | n/a | - |
II. Public POCs for CVE-2021-4240
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-331
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Insufficient Entropy Vulnerability in Telerik UI for ASP.NET - CVE-2025-0577
Glibc: vdso getrandom acceleration may return predictable ra
V. Comments for CVE-2021-4240
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