CVE-2018-7824 : Exploit Details and Defense Strategies

A vulnerability in Schneider Electric Modbus Serial Driver allows unauthorized write access to system files, posing a security risk.

Understanding CVE-2018-7824

What is CVE-2018-7824?

The CVE-2018-7824 vulnerability, also known as CWE-610, affects Schneider Electric Modbus Serial Driver versions V3.17 IE 37 and earlier for 64-bit Windows OS, V2.17 IE 27 and earlier for 32-bit Windows OS, and V14.12 and earlier for Driver Suite. It enables attackers to gain write access to restricted system files.

The Impact of CVE-2018-7824

This vulnerability could be exploited by malicious actors to write to system files that are typically restricted to users with SYSTEM privilege or other privileged users.

Technical Details of CVE-2018-7824

Vulnerability Description

The vulnerability, categorized as CWE-610, allows for externally controlled references to system resources, enabling unauthorized write access.

Affected Systems and Versions

Schneider Electric Modbus Serial Driver for 64-bit Windows OS: V3.17 IE 37 and earlier
Schneider Electric Modbus Serial Driver for 32-bit Windows OS: V2.17 IE 27 and earlier
Driver Suite version: V14.12 and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability to gain unauthorized write access to critical system files, bypassing normal user restrictions.

Mitigation and Prevention

Immediate Steps to Take

Update Schneider Electric Modbus Serial Driver to the latest version
Implement strict access controls to limit system file modifications
Monitor system file changes for suspicious activities

Long-Term Security Practices

Regularly review and update security policies and procedures
Conduct security training for users to recognize and report suspicious activities

Patching and Updates

Apply patches and updates provided by Schneider Electric to address the CVE-2018-7824 vulnerability