CVE Vulnerabilities

CVE-2023-26593

Cleartext Storage of Sensitive Information

Published: Apr 11, 2023 | Modified: Apr 21, 2023
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

CENTUM series provided by Yokogawa Electric Corporation are vulnerable to cleartext storage of sensitive information. If an attacker who can login or access the computer where the affected product is installed tampers the password file stored in the computer, the user privilege which CENTUM managed may be escalated. As a result, the control system may be operated with the escalated user privilege. To exploit this vulnerability, the following prerequisites must be met: (1)An attacker has obtained user credentials where the affected product is installed, (2)CENTUM Authentication Mode is used for user authentication when CENTUM VP is used. The affected products and versions are as follows: CENTUM CS 1000, CENTUM CS 3000 (Including CENTUM CS 3000 Entry Class) R2.01.00 to R3.09.50, CENTUM VP (Including CENTUM VP Entry Class) R4.01.00 to R4.03.00, R5.01.00 to R5.04.20, and R6.01.00 and later, B/M9000 CS R5.04.01 to R5.05.01, and B/M9000 VP R6.01.01 to R7.04.51 and R8.01.01 and later

Weakness

The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.

Affected Software

Name Vendor Start Version End Version
B/m9000cs Yokogawa r5.04.01 r5.05.01
Centum_vp Yokogawa r6.01.00 *
Centum_vp Yokogawa r5.01.00 r5.04.20
Centum_vp Yokogawa r4.01.00 r4.03.00
Centum_vp_entry_class Yokogawa r6.01.00 *
Centum_vp_entry_class Yokogawa r4.01.00 r4.02.00
Centum_vp_entry_class Yokogawa r5.01.00 r5.04.20
Centum_cs_3000_entry_class Yokogawa r2.01.00 r3.09.50
Centum_cs_3000 Yokogawa r2.01.00 r3.09.50
Centum_cs_1000 Yokogawa r2.01.00 r3.09.50
Exaopc Yokogawa r2.01.00 r2.10.00
Exaopc Yokogawa r1.01.00 r1.20.00
Exaopc Yokogawa r3.01.00 *
B/m9000_vp Yokogawa r8.01.01 *
B/m9000_vp Yokogawa r6.01.01 r7.04.51

Extended Description

Because the information is stored in cleartext (i.e., unencrypted), attackers could potentially read it. Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information. When organizations adopt cloud services, it can be easier for attackers to access the data from anywhere on the Internet. In some systems/environments such as cloud, the use of “double encryption” (at both the software and hardware layer) might be required, and the developer might be solely responsible for both layers, instead of shared responsibility with the administrator of the broader system/environment.

Potential Mitigations

References