CVE-2019-6829 : Exploit Details and Defense Strategies

The Modicon M580 and Modicon M340 devices by Schneider Electric SE are affected by a CWE-248 vulnerability, potentially leading to denial of service attacks.

Understanding CVE-2019-6829

This CVE identifies a specific vulnerability in Modicon M580 and Modicon M340 devices that could be exploited to cause denial of service.

What is CVE-2019-6829?

The vulnerability in Modicon M580 (firmware version prior to V2.90) and Modicon M340 (firmware version prior to V3.10) allows attackers to trigger a denial of service by writing to specific memory locations using Modbus.

The Impact of CVE-2019-6829

Exploiting this vulnerability could result in a denial of service condition on the affected devices, disrupting their normal operation.

Technical Details of CVE-2019-6829

This section provides more technical insights into the vulnerability.

Vulnerability Description

The CWE-248 vulnerability, known as Uncaught Exception, affects Modicon M580 and Modicon M340 devices, enabling attackers to disrupt the devices by writing to specific memory locations.

Affected Systems and Versions

Product: Modicon M580
Vendor: Schneider Electric SE
Affected Version: Firmware version prior to V2.90
Product: Modicon M340
Vendor: Schneider Electric SE
Affected Version: Firmware version prior to V3.10

Exploitation Mechanism

The vulnerability can be exploited by attempting to write to specific memory locations in the controller using Modbus, triggering a denial of service.

Mitigation and Prevention

Protecting systems from CVE-2019-6829 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected devices to the latest firmware versions that address the vulnerability.
Implement network segmentation to limit exposure to potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch all devices and software in the network.
Conduct security assessments and penetration testing to identify and address vulnerabilities.
Educate users and administrators about secure practices and potential threats.
Implement access controls and authentication mechanisms to restrict unauthorized access.
Stay informed about security advisories and updates from Schneider Electric SE.

Patching and Updates

Ensure that all affected devices are promptly patched with the latest firmware versions provided by Schneider Electric SE to mitigate the CVE-2019-6829 vulnerability.