Unprotected Transport of Credentials in IDEC Corporation products - CVE-2021-20826

Vulnerability identifier: #VU59296

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2021-20826

CWE-ID: CWE-523

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vendor: IDEC Corporation

Affected software:
FC6A MICROSmart All-in-One CPU Module
FC6B MICROSmart All-in-One CPU Module
FC6A MICROSmart Plus CPU Module
FC6B MICROSmart Plus CPU Module
FT1A Controller SmartAXIS Pro/Lite
WindLDR
WindEDIT Lite
Data File Manager
WindEDIT

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to password leakage. A remote attacker on the local network can obtain the PLC web server user credentials from the communication between the PLC and the software.

Install updates from vendor's website.

• https://us.idec.com/idec-us/en/USD/Software-Downloads-Automation-Organizer
• https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdf
• https://us.idec.com/idec-us/en/USD/Programmable-Logic-Controller/Micro-PLC/FC6A-MicroSmart/c/MicroSmart_FC6A
• https://jvn.jp/en/vu/JVNVU92279973/