Authentication Bypass by Capture-replay in Mitsubishi Electric MELSEC-F Series

1) Authentication Bypass by Capture-replay

EUVDB-ID: #VU77828

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2023-2846

CWE-ID: CWE-294 - Authentication Bypass by Capture-replay

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to authentication bypass by capture-replay. 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: All versions

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

MELSEC-F FX3UC-16MR/DS-T ​MELSEC-F FX3UC-32MT-LT: All versions

MELSEC-F FX3UC-32MT-LT-2 MELSEC-F ​FX3UC-16MT/D-P4: All versions

MELSEC-F FX3UC-16MR/DSS-P4​: All versions

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

MELSEC-F ​FX3GC-32MT/D: All versions

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

​MELSEC-F FX3GE: All versions

MELSEC-F ​FX3GA: All versions

​MELSEC-F FX3S: All versions

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

MELSEC-F ​FX3SA-xMy-CM: All versions

External links

http://www.cisa.gov/news-events/ics-advisories/icsa-23-180-04
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-005_en.pdf

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.