SB2020081257 - Multiple vulnerabilities in Yokogawa CENTUM

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper Authentication (CVE-ID: CVE-2020-5608)

CWE-ID: CWE-287 - Improper Authentication

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

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker on the local network can send tampered communication packets.

This vulnerability affects the following versions of CENTUM: 

• CENTUM CS 3000 versions R3.08.10 - R3.09.50 (Including CENTUM CS 3000 Entry Class) 
• CENTUM VP versions R4.01.00 - R6.07.00 (Including CENTUM VP Entry Class) 
• B/M9000CS versions R5.04.01 - R5.05.01 
• B/M9000 VP versions R6.01.01 - R8.03.01

2) Path Traversal (CVE-ID: CVE-2020-5609)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker on the local network can send a specially crafted HTTP request and create or overwrite any file, run any commands

This vulnerability affects the following versions of CENTUM: 

• CENTUM CS 3000 versions R3.08.10 - R3.09.50 (Including CENTUM CS 3000 Entry Class) 
• CENTUM VP versions R4.01.00 - R6.07.00 (Including CENTUM VP Entry Class) 
• B/M9000CS versions R5.04.01 - R5.05.01 
• B/M9000 VP versions R6.01.01 - R8.03.01

Remediation

Install update from vendor's website.

References

• https://jvn.jp/vu/JVNVU97997181/index.html
• https://web-material3.yokogawa.com/1/29820/files/YSAR-20-0001-E.pdf