Yokogawa CENTUM and Exaopc Use of Hard-Coded Credentials (CVE-2022-21194)

critical Tenable OT Security Plugin ID 500628

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The following Yokogawa Electric products do not change the passwords of the internal Windows accounts from the initial configuration:
CENTUM VP versions from R5.01.00 to R5.04.20 and versions from R6.01.00 to R6.08.0, Exaopc versions from R3.72.00 to R3.79.00.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Yokogawa recommends updating the following products:

- CENTUM VP: update to R6.09.00 or later
- Exaopc: update to R3.80.00 or later
- CENTUM CS 3000: consider system upgrade to the latest revision of CENTUM VP

The method of obtaining and updating patch software depends on the support contract of each installation. Users who do not know how to obtain the update and install it should contact their service/sales person.

Please see Yokogawa’s full report (YSAR-22-0001) for update details.

For questions related to this report, please contact Yokogawa security.

Yokogawa also recommends the following countermeasures:

- Follow the installation instructions for each product and change the password of the OS account created when installing the product to an appropriate one.
- The initial password is set by default for the predefined user accounts in CENTUM VP and Exaopc. Be sure to change the initial password.
- When changing the password, ensure that the same password is set in the entire system.
- For more information about lists of the predefined user accounts in CENTUM VP and how to change the password for a user account, refer to: "CENTUM VP Security Guide"

Yokogawa strongly recommends users establish and maintain a full security program. Security program components include patch updates, anti-virus, backup and recovery, zoning, hardening, whitelisting, firewalls, etc.

Yokogawa can assist in setting up and running security programs. For considering the most effective risk mitigation plan, as a starting point, Yokogawa can perform a security risk assessment.

For questions related to this report, please contact Yokogawa.

Plugin Details

Severity: Critical

ID: 500628

Version: 1.12

Type: remote

Family: Tenable.ot

Published: 4/4/2022

Updated: 11/27/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2022-21194

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:yokogawa:centum_vp_entry_firmware:r4, cpe:/o:yokogawa:centum_vp_entry_firmware:r5, cpe:/o:yokogawa:centum_vp_firmware:r5, cpe:/o:yokogawa:centum_vp_firmware:r6, cpe:/o:yokogawa:centum_vp_entry_firmware:r6

Required KB Items: Tenable.ot/Yokogawa

Exploit Ease: No known exploits are available

Patch Publication Date: 3/11/2022

Vulnerability Publication Date: 3/11/2022

Reference Information

CVE: CVE-2022-21194

CWE: 798

ICSA: 22-083-01

Detections

Analytics