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CVE-2021-4241— phpservermon User.php setUserLoggedIn predictable algorithm in random number generator

Quick assessment

Affected
unspecified phpservermon
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.

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setUserLoggedIn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。

CVSS 2.6 · Low EPSS 0.79% · P54

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2021-4241

Vulnerability Information
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Vulnerability Title
phpservermon User.php setUserLoggedIn predictable algorithm in random number generator
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as problematic, was found in phpservermon. Affected is the function setUserLoggedIn 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 bb10a5f3c68527c58073258cb12446782d223bc3. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-213744.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息熵不充分
Source: CVE Program / CVE List V5
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setUserLoggedIn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-2021-4241

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III. Intelligence Information for CVE-2021-4241

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Patches & Fixes for CVE-2021-4241 (1)

Vendor Advisories for CVE-2021-4241 (2)

IV. Related Vulnerabilities

Same product: phpservermon
Same vendor: unspecified
Same weakness: CWE-331

V. Comments for CVE-2021-4241

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