Vulnerability identifier: #VU81998

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2023-4562

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MELSEC-F FX3U
Hardware solutions / Firmware
MELSEC-F ​FX3U-32MR/UA1
Hardware solutions / Firmware
MELSEC-F FX3U-64MR/UA1
Hardware solutions / Firmware
​MELSEC-F FX3U-32MS/ES
Hardware solutions / Firmware
MELSEC-F FX3U-64MS/ES
Hardware solutions / Firmware
​MELSEC-F FX3U-xMy/ES-A
Hardware solutions / Firmware
MELSEC-F FX3UC-xMT/z
Hardware solutions / Firmware
MELSEC-F ​FX3UC-16MR/D-T
Hardware solutions / Firmware
MELSEC-F FX3UC-16MR/DS-T
Hardware solutions / Firmware
MELSEC-F FX3UC-32MT-LT
Hardware solutions / Firmware
MELSEC-F FX3UC-32MT-LT-2
Hardware solutions / Firmware
MELSEC-F FX3UC-16MT/D-P4
Hardware solutions / Firmware
MELSEC-F FX3UC-16MT/DSS-P4
Hardware solutions / Firmware
MELSEC-F FX3G-xMy/ES-A
Hardware solutions / Firmware
MELSEC-F FX3G-xMy/z
Hardware solutions / Firmware
MELSEC-F FX3GC-32MT/DSS
Hardware solutions / Firmware
MELSEC-F ​FX3GC-32MT/D
Hardware solutions / Firmware
​MELSEC-F FX3GE
Hardware solutions / Firmware
MELSEC-F ​FX3GA
Hardware solutions / Firmware
​MELSEC-F FX3S
Hardware solutions / Firmware
MELSEC-F ​FX3SA-xMy-CM
Hardware solutions / Firmware
MELSEC-F ​FX3S-30My/z-2AD
Hardware solutions / Firmware

Vendor: Mitsubishi Electric

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to the application.

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

Vulnerable software versions

MELSEC-F FX3U: All versions

MELSEC-F ​FX3U-32MR/UA1: All versions

MELSEC-F FX3U-64MR/UA1: All versions

​MELSEC-F FX3U-32MS/ES: All versions

MELSEC-F FX3U-64MS/ES: All versions

​MELSEC-F FX3U-xMy/ES-A: All versions

MELSEC-F FX3UC-xMT/z: All versions

MELSEC-F ​FX3UC-16MR/D-T: All versions

MELSEC-F FX3UC-16MR/DS-T: All versions

MELSEC-F FX3UC-32MT-LT: All versions

MELSEC-F FX3UC-32MT-LT-2: All versions

MELSEC-F FX3UC-16MT/D-P4: All versions

MELSEC-F FX3UC-16MT/DSS-P4: All versions

MELSEC-F FX3G-xMy/ES-A: All versions

MELSEC-F FX3G-xMy/z: All versions

MELSEC-F FX3GC-32MT/DSS: All versions

MELSEC-F ​FX3GC-32MT/D: All versions

​MELSEC-F FX3GE: All versions

MELSEC-F ​FX3GA: All versions

​MELSEC-F FX3S: All versions

MELSEC-F ​FX3SA-xMy-CM: All versions

MELSEC-F ​FX3S-30My/z-2AD: All versions

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External links
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-012_en.pdf
http://www.cisa.gov/news-events/ics-advisories/icsa-23-285-13
http://jvn.jp/vu/JVNVU90509290/

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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.