CVE-2020-21120

Comprehensive Technical Analysis of CVE-2020-21120

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2020-21120 CVSS Score: 9.8

The vulnerability in question is an SQL Injection flaw in the home\controls\cart.class.php file of UQCMS version 2.1.3. This vulnerability allows attackers to execute arbitrary SQL commands via the cookie_cart parameter to /index.php/cart/num.

Severity Evaluation:

• CVSS Score: 9.8 (Critical)
• Impact: This vulnerability can lead to unauthorized access, data breaches, and potential full system compromise.
• Exploitability: The vulnerability is relatively easy to exploit given the right conditions and access to the vulnerable endpoint.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• SQL Injection: Attackers can inject malicious SQL queries through the cookie_cart parameter.
• Remote Code Execution: If the SQL injection allows for command execution, attackers could potentially execute arbitrary commands on the server.

Exploitation Methods:

• Manual Exploitation: Attackers can manually craft SQL injection payloads and send them via HTTP requests to the vulnerable endpoint.
• Automated Tools: Use of automated SQL injection tools like SQLMap to identify and exploit the vulnerability.

3. Affected Systems and Software Versions

Affected Software:

• UQCMS Version: 2.1.3

Affected Systems:

• Any system running UQCMS 2.1.3 with the vulnerable home\controls\cart.class.php file.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Upgrade to a patched version of UQCMS if available.
• Input Validation: Implement strict input validation and sanitization for the cookie_cart parameter.
• Parameterized Queries: Use parameterized queries or prepared statements to prevent SQL injection.

Long-Term Mitigation:

• Regular Updates: Ensure that all software components are regularly updated and patched.
• Security Audits: Conduct regular security audits and vulnerability assessments.
• Web Application Firewalls (WAF): Deploy WAFs to detect and block SQL injection attempts.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Data Breaches: Potential for significant data breaches, including sensitive user information.
• System Compromise: Possible full system compromise if the SQL injection leads to remote code execution.

Long-Term Impact:

• Reputation Damage: Organizations using vulnerable software may face reputational damage due to data breaches.
• Increased Awareness: Highlights the importance of secure coding practices and regular software updates.

6. Technical Details for Security Professionals

Vulnerability Details:

• Vulnerable File: home\controls\cart.class.php
• Vulnerable Parameter: cookie_cart
• Endpoint: /index.php/cart/num

Exploitation Example:

/index.php/cart/num?cookie_cart=1'; DROP TABLE users; --

Mitigation Code Example:

// Example of using prepared statements in PHP
$stmt = $pdo->prepare("SELECT * FROM cart WHERE id = :id");
$stmt->bindParam(':id', $cookie_cart);
$stmt->execute();

References:

• OWASP SQL Injection Prevention Cheat Sheet
• GitHub Issue

Conclusion: CVE-2020-21120 is a critical SQL Injection vulnerability in UQCMS 2.1.3 that requires immediate attention. Organizations should prioritize patching and implementing robust input validation and sanitization mechanisms to mitigate the risk. Regular security audits and the use of WAFs can further enhance the security posture against such vulnerabilities.