CVE-2022-31204 : Exploit Details and Defense Strategies

Omron CS series, CJ series, and CP series PLCs have been identified as having a security vulnerability related to cleartext passwords. Find out more about this issue, its impact, and ways to mitigate the risk.

Understanding CVE-2022-31204

This section provides insights into the vulnerability associated with Omron PLCs and the implications it may have on affected systems.

What is CVE-2022-31204?

The vulnerability involves the use of cleartext passwords on Omron CS series, CJ series, and CP series PLCs. These devices allow for the configuration of a password through specific commands transmitted in cleartext, potentially exposing sensitive operations.

The Impact of CVE-2022-31204

The presence of cleartext passwords on these PLCs can pose a significant security risk, potentially enabling unauthorized access to critical engineering operations and system configurations.

Technical Details of CVE-2022-31204

Explore the specific technical aspects of the vulnerability, including how it can be exploited and the systems and versions affected.

Vulnerability Description

Omron PLCs feature a UM Protection setting that, when configured with cleartext passwords, can be abused to gain unauthorized access to sensitive functions, such as project/logic uploads and downloads.

Affected Systems and Versions

The vulnerability affects Omron CS series, CJ series, and CP series PLCs through May 18, 2022, which continue to utilize cleartext passwords for password protection mechanisms.

Exploitation Mechanism

By intercepting and analyzing the cleartext commands used to set and clear passwords through the OMRON FINS commands, malicious actors may exploit this vulnerability to compromise the security of affected PLCs.

Mitigation and Prevention

Learn about the necessary steps to address and prevent the exploitation of CVE-2022-31204 on Omron PLCs.

Immediate Steps to Take

Users are advised to implement alternative security measures, such as employing strong, encrypted passwords, disabling cleartext transmission, and restricting network access to vulnerable PLCs.

Long-Term Security Practices

Establishing comprehensive security protocols, conducting regular security audits, and investing in training for secure configuration practices can help mitigate the risk posed by cleartext passwords on PLCs.

Patching and Updates

Stay informed about security advisories from Omron and apply firmware updates or patches that address the cleartext password vulnerability on affected PLC models.