Improper Authentication in Mitsubishi Electric MELSEC-F Series

1) Improper Authentication

EUVDB-ID: #VU81998

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 - Improper Authentication

Exploit availability: No

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

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/

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.