EUVD-2023-33559

Comprehensive Technical Analysis of EUVD-2023-33559

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in the Custom 404 Pro WordPress plugin before version 3.8.1 involves improper sanitization of database inputs, leading to multiple SQL Injection vulnerabilities. The Base Score of 9.8, as per CVSS 3.1, indicates a critical severity level. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• AV:N (Attack Vector: Network): The vulnerability is exploitable remotely over the network.
• AC:L (Attack Complexity: Low): The attack requires low skill or resources.
• PR:N (Privileges Required: None): No privileges are required to exploit the vulnerability.
• UI:N (User Interaction: None): No user interaction is required.
• S:U (Scope: Unchanged): The vulnerability does not change the security scope.
• C:H (Confidentiality: High): There is a high impact on the confidentiality of the data.
• I:H (Integrity: High): There is a high impact on the integrity of the data.
• A:H (Availability: High): There is a high impact on the availability of the system.

Given these metrics, the vulnerability is highly critical and poses a significant risk to any system running the affected versions of the plugin.

2. Potential Attack Vectors and Exploitation Methods

SQL Injection (SQLi) vulnerabilities can be exploited through various attack vectors:

• Direct Input Manipulation: Attackers can manipulate input fields (e.g., search boxes, login forms) to inject malicious SQL queries.
• URL Parameters: Attackers can inject SQL commands through URL parameters that are directly used in SQL queries.
• Cookies and Headers: If the application uses cookies or headers in SQL queries, attackers can manipulate these to inject SQL commands.

Exploitation methods include:

• Union-Based SQL Injection: Attackers can use UNION SELECT statements to extract data from the database.
• Error-Based SQL Injection: Attackers can induce errors to gather information about the database structure.
• Blind SQL Injection: Attackers can use true/false responses to infer information about the database.

3. Affected Systems and Software Versions

The vulnerability affects the Custom 404 Pro WordPress plugin versions prior to 3.8.1. Any WordPress site using this plugin in the specified versions is at risk.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Update the Plugin: Immediately update the Custom 404 Pro plugin to version 3.8.1 or later.
• Input Validation and Sanitization: Ensure that all database inputs are properly validated and sanitized. Use prepared statements and parameterized queries to prevent SQL injection.
• Web Application Firewall (WAF): Deploy a WAF to monitor and block malicious SQL injection attempts.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
• User Education: Educate users and developers about the risks of SQL injection and best practices for secure coding.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using the affected plugin. Given the widespread use of WordPress, the potential impact is broad, affecting various sectors including e-commerce, media, and government websites. The high severity score indicates that successful exploitation could lead to data breaches, unauthorized access, and service disruptions, which could have legal and financial repercussions under regulations such as GDPR.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerability Identification: The vulnerability is identified by CVE-2023-2032 and GSD-2023-2032.
• References: Further details can be found at WPScan Vulnerability Database.
• ENISA ID: The ENISA ID for the product is 17623057-5649-389c-a5ca-2ba49834a16a with the affected versions being 0 <3.8.1.
• Vendor Information: The vendor is listed as "Unknown," indicating that the plugin may be developed by an independent developer or a small organization.

Security professionals should prioritize patching and monitoring for any signs of exploitation. Regular updates and adherence to secure coding practices are essential to mitigate such vulnerabilities in the future.

Conclusion

The SQL Injection vulnerability in the Custom 404 Pro WordPress plugin is critical and requires immediate attention. Organizations should update the plugin to the latest version and implement robust security measures to protect against potential exploitation. The impact on the European cybersecurity landscape underscores the importance of proactive security management and compliance with regulatory standards.