JVNDB-2023-001005

Active debug code vulnerability in OMRON CP1L-EL20DR-D

Active debug code (CWE-489) exists in CP1L-EL20DR-D provided by OMRON Corporation, which may lead to a command that is not specified in FINS protocol being executed without authentication.

Georgy Kiguradze of Positive Technologies reported this vulnerability to JPCERT/CC.
JPCERT/CC coordinated with the developer.

* Programmable Logic Controller (PLC) CP1L Series

OMRON Corporation

• CP1L-EL20DR-D all versions

To check the product names and versions, refer to the manual "CP Series CP1L-EL/EM CPU Unit User's Manual (SBCA-406)" provided by the developer.

A remote unauthenticated attacker may read/write in arbitrary area of the device memory, which may lead to overwriting the firmware, causing a denial-of-service (DoS) condition, and/or arbitrary code execution.

[Update the product and enable "Extend protection password" function]
Update the product to the below product/version where UM read protection and task read protection are implemented, and enable "Extend protection password" function.

The programmable controller (PLC) CP1L Series Ver.1.1 or later
CX-Programmer Ver.9.6 or later
For more information, refer to the information provided by the developer under [Vendor Status] section's [Status (Vulnerable)] page.

[Apply Workarounds]
Applying the workarounds may mitigate the impacts of this vulnerability.
For more information, refer to the information provided by the developer under [Vendor Status] section's [Status (Vulnerable)] page.

OMRON Corporation

• JVN : Information from OMRON Corporation

1. Active Debug Code(CWE-489) [Other]

1. CVE-2023-22357

1. JVN : JVNVU#97575890
2. National Vulnerability Database (NVD) : CVE-2023-22357

• [2023/01/12]
    Web page was published