CVE-2022-34763 : Security Advisory and Response

This article provides detailed information about CVE-2022-34763, a vulnerability in Schneider Electric's OPC UA Modicon and X80 advanced RTU Communication Modules that could lead to the loading of unauthorized firmware images due to insufficient verification of data authenticity.

Understanding CVE-2022-20657

CVE-2022-34763 is a CWE-345 vulnerability that affects certain versions of Schneider Electric's communication modules.

What is CVE-2022-20657?

The vulnerability is caused by inadequate verification of firmware signatures, allowing unauthorized firmware images to be loaded onto affected devices.

The Impact of CVE-2022-20657

With a CVSS base score of 5.9, this medium-severity vulnerability poses a high risk to the integrity and availability of the affected systems. Attackers can exploit this flaw to compromise the affected devices.

Technical Details of CVE-2022-20657

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability stems from the lack of proper verification of firmware signatures, enabling the loading of unauthorized firmware images.

Affected Systems and Versions

The vulnerability affects the OPC UA Modicon Communication Module (BMENUA0100) prior to version 1.10 and the X80 advanced RTU Communication Module (BMENOR2200H) version 2.01 and later.

Exploitation Mechanism

Attackers can exploit this vulnerability remotely via a network connection, making it crucial for affected users to take immediate action.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-34763, users are advised to take the following steps:

Immediate Steps to Take

Update affected modules to the latest patched versions provided by Schneider Electric.
Implement network security measures to prevent unauthorized access to the devices.

Long-Term Security Practices

Regularly monitor for security advisories and updates from Schneider Electric.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security patches and updates released by Schneider Electric to address CVE-2022-34763 and other potential vulnerabilities.