CVE-2021-40543 : Security Advisory and Response

OpenSIS-Classic Version 8.0 is affected by a SQL injection vulnerability due to a lack of sanitization of input data at two parameters $_GET['usrid'] and $_GET['prof_id'] in the PasswordCheck.php file.

Understanding CVE-2021-40543

This CVE involves a SQL injection vulnerability in OpenSIS-Classic Version 8.0.

What is CVE-2021-40543?

The vulnerability arises due to inadequate sanitization of input data at specific parameters in OpenSIS-Classic.

The Impact of CVE-2021-40543

The SQL injection vulnerability could allow malicious actors to execute arbitrary SQL queries, leading to data leakage, data manipulation, or unauthorized access.

Technical Details of CVE-2021-40543

This section provides detailed technical insights into the CVE.

Vulnerability Description

The issue exists in OpenSIS-Classic Version 8.0, specifically in the PasswordCheck.php file, where input data at $_GET['usrid'] and $_GET['prof_id'] is not properly sanitized, opening the door to SQL injection attacks.

Affected Systems and Versions

Affected Product: OpenSIS-Classic
Affected Version: 8.0

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious SQL queries through the vulnerable parameters $_GET['usrid'] and $_GET['prof_id'] in the PasswordCheck.php file.

Mitigation and Prevention

In this section, find recommendations to mitigate the risk posed by CVE-2021-40543.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Implement input sanitization mechanisms to filter and validate user-supplied data.
Restrict access to sensitive files and directories within the application.

Long-Term Security Practices

Conduct regular security audits and penetration testing to identify vulnerabilities.
Educate developers on secure coding practices to prevent similar issues in the future.

Patching and Updates

Regularly check for security updates and patches from OpenSIS-Classic to address this vulnerability.