CVE-2020-7489 : Exploit Details and Defense Strategies

A CWE-74 vulnerability exists in EcoStruxure Machine Expert – Basic or SoMachine Basic programming software, potentially allowing the transference of malicious code to the controller.

Understanding CVE-2020-7489

What is CVE-2020-7489?

This CVE identifies a CWE-74 vulnerability related to improper neutralization of special elements in output used by a downstream component ('Injection') in specific programming software.

The Impact of CVE-2020-7489

The vulnerability could lead to DLL substitution, enabling the transfer of malicious code to the controller, posing a significant security risk.

Technical Details of CVE-2020-7489

Vulnerability Description

The vulnerability involves improper neutralization of special elements in the software's output, potentially allowing for injection attacks.

Affected Systems and Versions

SoMachine Basic (all versions)
EcoStruxure Machine Expert – Basic (all versions)
Modicon M100 Logic Controller (all versions)
Modicon M200 Logic Controller (all versions)
Modicon M221 Logic Controller (all versions)

Exploitation Mechanism

The vulnerability could be exploited to substitute DLLs and introduce malicious code into the controller, compromising its integrity.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by the software vendor.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update software and firmware to address security vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate risks.

Patching and Updates

Ensure timely installation of security patches and updates to protect systems from known vulnerabilities.