Vulnerability identifier: #VU82712

Vulnerability risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]

CVE-ID: CVE-2023-4625

CWE-ID: CWE-307

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MELSEC iQ-F FX5U
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-32MT/DS-TS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5UC-32MT/DSS-TS
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F Series FX5UJ CPU module
Hardware solutions / Routers & switches, VoIP, GSM, etc
MELSEC iQ-F FX5S
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Mitsubishi Electric

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper restriction of excessive authentication attempts in the web server function. A remote attacker can prevent legitimate users from logging in to the web server function for a certain period of time

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

MELSEC iQ-F FX5U: All versions

MELSEC iQ-F FX5UC: All versions

MELSEC iQ-F FX5UC-32MT/DS-TS: All versions

MELSEC iQ-F FX5UC-32MT/DSS-TS: All versions

MELSEC iQ-F Series FX5UJ CPU module: All versions

MELSEC iQ-F FX5S: All versions

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External links
http://www.cisa.gov/news-events/ics-advisories/icsa-23-306-02
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-014_en.pdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.