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CVE-2023-4625— Denial-of-Service（DoS） Vulnerability in Web server function on MELSEC Series CPU module

Quick assessment

Affected
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES
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.

Mitsubishi Electric MELSEC iQ-F series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 Mitsubishi Electric MELSEC iQ-F Series存在安全漏洞，该漏洞源于验证功能限制不当。

CVSS 5.3 · Medium EPSS 0.95% · P60

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force
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I. Basic Information for CVE-2023-4625

Vulnerability Information
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Vulnerability Title
Denial-of-Service（DoS） Vulnerability in Web server function on MELSEC Series CPU module
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Restriction of Excessive Authentication Attempts vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F/iQ-R Series CPU modules Web server function allows a remote unauthenticated attacker to prevent legitimate users from logging into the Web server function for a certain period after the attacker has attempted to log in illegally by continuously attempting unauthorized login to the Web server function. The impact of this vulnerability will persist while the attacker continues to attempt unauthorized login.
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
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Mitsubishi Electric MELSEC iQ-F series 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mitsubishi Electric MELSEC iQ-F series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 Mitsubishi Electric MELSEC iQ-F Series存在安全漏洞，该漏洞源于验证功能限制不当。
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
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ES all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ES all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/ES all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/ES all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/ES all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MR/DS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MR/DS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MR/DS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ESS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/ESS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/ESS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DSS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-64MT/DSS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-80MT/DSS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/D all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/D all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/D all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-64MT/DSS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-96MT/DSS all versions (for serial number 17X**** and later) -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DS-TS all versions -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS all versions -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MR/DS-TS all versions -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-24MT/ES all versions -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-40MT/ES all versions -
Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-60MT/ES all versions -

II. Public POCs for CVE-2023-4625

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2023-4625

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Vendor Advisories for CVE-2023-4625 (2)

Other References for CVE-2023-4625 (1)

IV. Related Vulnerabilities

Same product: MELSEC iQ-F Series FX5U-32MT/ES
Same vendor: Mitsubishi Electric Corporation
Same weakness: CWE-307

V. Comments for CVE-2023-4625

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