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CVE-2021-4432— PCMan FTP Server USER Command denial of service

Quick assessment

Affected
PCMan FTP Server
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.

PCMan FTP Server是一套内容管理系统。 PCMan FTP Server 2.0.7版本存在安全漏洞，该漏洞源于组件USER Command Handler会导致拒绝服务。

CVSS 5.3 · Medium EPSS 1.32% · P69

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-4432

Vulnerability Information
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Vulnerability Title
PCMan FTP Server USER Command denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This affects an unknown part of the component USER Command Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250719.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的资源关闭或释放
Source: CVE Program / CVE List V5
Vulnerability Title
PCMan FTP Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PCMan FTP Server是一套内容管理系统。 PCMan FTP Server 2.0.7版本存在安全漏洞，该漏洞源于组件USER Command Handler会导致拒绝服务。
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
PCMan FTP Server 2.0.7 -

II. Public POCs for CVE-2021-4432

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III. Intelligence Information for CVE-2021-4432

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Vendor Advisories for CVE-2021-4432 (2)

Exploits & Public PoCs for CVE-2021-4432 (2)

IV. Related Vulnerabilities

Same product: FTP Server
Same vendor: PCMan
Same weakness: CWE-404

V. Comments for CVE-2021-4432

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