CVE-2022-45794 : Exploit Details and Defense Strategies

Omron CJ-series and CS-series unauthenticated filesystem access vulnerability allows an attacker with network access to read and write files on the PLC internal memory and memory card.

Understanding CVE-2022-45794

This section provides insights into the impact, technical details, and mitigation strategies related to the Omron CJ-series and CS-series unauthenticated filesystem access vulnerability.

What is CVE-2022-45794?

The CVE-2022-45794 vulnerability affects Omron CJ-series and CS-series CPU modules, enabling unauthorized access to the PLC memory and memory card through a network protocol.

The Impact of CVE-2022-45794

The vulnerability, identified as CAPEC-165 File Manipulation, poses a high risk, with a CVSS V3.1 base severity score of 8.6, indicating high confidentiality impact without requiring special privileges or user interaction.

Technical Details of CVE-2022-45794

The following details shed light on the vulnerability's description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

An attacker with network access to the affected PLCs can read and write files on the internal memory and memory card using a network protocol.

Affected Systems and Versions

The Omron CJ-series and CS-series CPU modules with all versions are affected by this vulnerability.

Exploitation Mechanism

The vulnerability allows threat actors to manipulate files on the PLC memory and memory card unchecked, potentially leading to unauthorized data access or tampering.

Mitigation and Prevention

This section outlines immediate steps and long-term security practices to mitigate the risks associated with CVE-2022-45794.

Immediate Steps to Take

Restrict network access to the affected PLCs and implement firewall rules to limit unauthorized interactions.
Monitor network traffic for any suspicious activities related to filesystem manipulation.

Long-Term Security Practices

Regularly update and patch the firmware of Omron CJ-series and CS-series CPU modules to address known vulnerabilities.
Conduct security assessments and penetration testing to detect and remediate potential security gaps.

Patching and Updates

Refer to the provided references for detailed guidance on applying security patches and updates from the vendor.