CVE-2021-38390 : What You Need to Know

A Blind SQL injection vulnerability was discovered in Delta Electronics DIAEnergie version 1.7.5 and prior, allowing remote attackers to execute arbitrary code.

Understanding CVE-2021-38390

This CVE involves a Blind SQL injection vulnerability in the Delta Electronics DIAEnergie software, specifically in version 1.7.5 and earlier.

What is CVE-2021-38390?

A Blind SQL injection vulnerability exists in the /DataHandler/HandlerEnergyType.ashx endpoint of Delta Electronics DIAEnergie Version 1.7.5 and prior. The application does not properly validate the user-controlled value supplied through the parameter egyid before using it as part of an SQL query. A remote, unauthenticated attacker can exploit this issue to execute arbitrary code in the context of NT SERVICE\MSSQLSERVER.

The Impact of CVE-2021-38390

The vulnerability allows an attacker to execute arbitrary code on the affected system without authentication, potentially leading to unauthorized access, data theft, or system compromise.

Technical Details of CVE-2021-38390

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises due to improper validation of user-controlled inputs in a specific endpoint, allowing attackers to inject and execute arbitrary SQL queries.

Affected Systems and Versions

Delta Electronics DIAEnergie Version 1.7.5 and prior are affected by this vulnerability.

Exploitation Mechanism

Remote, unauthenticated attackers can exploit this issue by manipulating the parameter egyid to inject malicious SQL queries.

Mitigation and Prevention

To secure systems against CVE-2021-38390, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Update the Delta Electronics DIAEnergie software to the latest version to eliminate the vulnerability.
Implement strong input validation mechanisms to sanitize user-controlled inputs.

Long-Term Security Practices

Regularly monitor and audit system logs for any suspicious activities indicating SQL injection attempts.
Educate developers on secure coding practices to prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security updates released by Delta Electronics and promptly apply patches to ensure system security.