CVE-2019-6849 : Exploit Details and Defense Strategies

The Modicon M580, Modicon BMENOC 0311, and Modicon BMENOC 0321 are affected by a vulnerability that could lead to information exposure.

Understanding CVE-2019-6849

This CVE involves a vulnerability in specific Modbus services from the controller/communication module's REST API, potentially exposing sensitive information.

What is CVE-2019-6849?

The vulnerability in Modicon M580, Modicon BMENOC 0311, and Modicon BMENOC 0321 could result in the disclosure of sensitive data when utilizing certain Modbus services.

The Impact of CVE-2019-6849

The exposure of sensitive information through this vulnerability could pose risks to the confidentiality and integrity of data stored or transmitted by the affected systems.

Technical Details of CVE-2019-6849

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability, categorized as CWE-200: Information Exposure, allows unauthorized access to sensitive information via the REST API of the affected controller/communication modules.

Affected Systems and Versions

Products: Modicon M580, Modicon BMENOC 0311, Modicon BMENOC 0321
Versions: Modicon M580, Modicon BMENOC 0311, Modicon BMENOC 0321

Exploitation Mechanism

The vulnerability can be exploited by utilizing specific Modbus services provided by the REST API of the affected controller/communication modules.

Mitigation and Prevention

Protecting systems from CVE-2019-6849 is crucial to maintaining data security.

Immediate Steps to Take

Disable or restrict access to the vulnerable Modbus services on the affected systems.
Implement network segmentation to isolate critical systems from potentially compromised ones.
Monitor network traffic for any suspicious activities that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update and patch the affected systems to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address any weaknesses in the system.

Patching and Updates

Stay informed about security advisories and updates provided by the vendor to apply patches promptly and enhance system security.