#VU77828 Authentication Bypass by Capture-replay in Mitsubishi Electric products - CVE-2023-2846

Vulnerability identifier: #VU77828

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-2846

CWE-ID: CWE-294

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
MELSEC-F ​FX3UC-16MR/D-T
MELSEC-F FX3UC-16MR/DS-T​MELSEC-F FX3UC-32MT-LT
MELSEC-F FX3UC-32MT-LT-2MELSEC-F ​FX3UC-16MT/D-P4
MELSEC-F FX3UC-16MR/DSS-P4​
MELSEC-F FX3G-xMy/ES-A
MELSEC-F ​FX3GC-32MT/D
MELSEC-F FX3GC-32MT/DSS
​MELSEC-F FX3GE
MELSEC-F ​FX3GA
​MELSEC-F FX3S
MELSEC-F ​FX3S-30My/z-2AD
MELSEC-F ​FX3SA-xMy-CM

Software vendor:
Mitsubishi Electric

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.

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

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