CVE-2020-7520 : What You Need to Know

A CWE-601 vulnerability exists in Schneider Electric Software Update (SESU) V2.4.0 and prior, allowing for URL Redirection to Untrusted Sites ('Open Redirect') with the potential to execute malicious code on the victim's machine.

Understanding CVE-2020-7520

This CVE involves a security flaw in Schneider Electric Software Update (SESU) versions prior to V2.4.0.

What is CVE-2020-7520?

The vulnerability allows an attacker with privileged access to divert traffic updates through a server under their control, leading to a man-in-the-middle attack for malicious code execution.

The Impact of CVE-2020-7520

Exploitation of this vulnerability could result in the execution of arbitrary code on the victim's machine, posing a significant security risk.

Technical Details of CVE-2020-7520

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability is classified as CWE-601, enabling URL Redirection to Untrusted Sites ('Open Redirect') within Schneider Electric Software Update (SESU) V2.4.0 and earlier versions.

Affected Systems and Versions

Product: Schneider Electric Software Update (SESU) V2.4.0 and prior

Exploitation Mechanism

Attacker needs privileged access to modify a Windows registry key on the engineering workstation
Traffic updates are redirected through the attacker's server
Man-in-the-middle attack is utilized for exploit completion

Mitigation and Prevention

Protecting systems from CVE-2020-7520 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Schneider Electric
Restrict privileged access to critical systems
Monitor network traffic for suspicious activities

Long-Term Security Practices

Regularly update and patch software and systems
Conduct security training for employees to recognize social engineering attacks

Patching and Updates

Ensure all systems are updated with the latest security patches
Regularly check for vendor updates and security advisories