CVE-2020-7524 : Exploit Details and Defense Strategies

A vulnerability in Modicon M218 Logic Controller (V5.0.0.7 and prior) could lead to Denial of Service by sending a specific crafted IPV4 packet to the controller.

Understanding CVE-2020-7524

This CVE involves an Out-of-bounds Write vulnerability in the Modicon M218 Logic Controller.

What is CVE-2020-7524?

The vulnerability allows an attacker to cause a Denial of Service by sending a specific crafted IPV4 packet to the Schneider Electric Modicon M218 Logic Controller, resulting in the device malfunctioning and requiring a reboot to resume normal operation.

The Impact of CVE-2020-7524

Exploitation of this vulnerability can lead to downtime and disruption of services relying on the affected Modicon M218 Logic Controller.

Technical Details of CVE-2020-7524

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability is categorized as an Out-of-bounds Write issue (CWE-787) in the Modicon M218 Logic Controller.

Affected Systems and Versions

Product: Modicon M218 Logic Controller V5.0.0.7 and prior

Exploitation Mechanism

Attackers can exploit the vulnerability by sending a specific crafted IPV4 packet to the controller, causing a Denial of Service.

Mitigation and Prevention

Protecting systems from CVE-2020-7524 is crucial to maintaining security.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly to mitigate the vulnerability.
Implement network segmentation to limit exposure of the affected controller.

Long-Term Security Practices

Regularly monitor and audit network traffic for any suspicious activities.
Conduct security training for personnel to recognize and respond to potential threats.

Patching and Updates

Stay informed about security advisories from Schneider Electric and apply patches as soon as they are available.