#VU81998 Improper Authentication in Mitsubishi Electric products - CVE-2023-4562

Vulnerability identifier: #VU81998

Vulnerability risk: High

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2023-4562

CWE-ID: CWE-287

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

Software vendor:
Mitsubishi Electric

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.

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

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