EUVD-2024-47312

Comprehensive Technical Analysis of EUVD-2024-47312

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in the "Email Subscribers by Icegram Express" plugin for WordPress is a time-based SQL Injection (SQLi) vulnerability. This type of vulnerability is particularly severe because it allows unauthenticated attackers to manipulate SQL queries by injecting malicious code into the db parameter. The lack of proper escaping and preparation of SQL queries in versions up to and including 5.7.25 makes this vulnerability critical.

Severity Evaluation:

• CVSS Base Score: 9.8
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high CVSS score indicates that the vulnerability is critical. The attack vector (AV:N) is network-based, requiring low complexity (AC:L) and no privileges (PR:N) or user interaction (UI:N). The impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H), making it a significant threat.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated SQL Injection: Attackers can exploit the vulnerability without needing to authenticate, making it easier to execute.
• Time-Based SQL Injection: This method involves injecting SQL code that causes a delay in the database response, allowing attackers to extract information based on the timing of the responses.

Exploitation Methods:

• Data Exfiltration: Attackers can extract sensitive information such as user credentials, email addresses, and other personal data stored in the database.
• Database Manipulation: Attackers can modify database entries, delete data, or insert malicious content.
• Privilege Escalation: By manipulating SQL queries, attackers can gain higher privileges within the application, leading to further exploitation.

3. Affected Systems and Software Versions

Affected Software:

• Plugin: Email Subscribers by Icegram Express
• Versions: All versions up to and including 5.7.25

Affected Systems:

• WordPress Websites: Any WordPress site using the vulnerable versions of the plugin.
• WooCommerce Integrations: Websites using WooCommerce in conjunction with the vulnerable plugin.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Ensure that the plugin is updated to a version higher than 5.7.25, where the vulnerability has been patched.
• Disable the Plugin: If an update is not immediately available, consider disabling the plugin until a secure version is released.

Long-Term Mitigation:

• Input Validation: Implement strict input validation and sanitization for all user-supplied data.
• Prepared Statements: Use prepared statements and parameterized queries to prevent SQL injection.
• Regular Audits: Conduct regular security audits and code reviews to identify and mitigate potential vulnerabilities.
• Web Application Firewall (WAF): Deploy a WAF to monitor and block malicious SQL injection attempts.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using WordPress for their websites. Given the widespread use of WordPress and the popularity of the Email Subscribers plugin, the potential for data breaches and unauthorized access is high. This underscores the need for robust cybersecurity measures and continuous monitoring of third-party plugins and extensions.

6. Technical Details for Security Professionals

Vulnerable Code Analysis:

• File: class-es-db-contacts.php
• Line: 834
• Issue: Insufficient escaping and preparation of SQL queries involving the db parameter.

Example of Vulnerable Code:

$query = "SELECT * FROM contacts WHERE id = " . $_GET['db'];

Secure Code Example:

$db = intval($_GET['db']); // Ensure the input is an integer
$query = $wpdb->prepare("SELECT * FROM contacts WHERE id = %d", $db);

References:

• Wordfence Threat Intel
• WordPress Plugin Repository
• WordPress Plugin Changeset

Conclusion: The SQL Injection vulnerability in the Email Subscribers plugin highlights the importance of secure coding practices and regular updates. Organizations should prioritize updating the plugin and implementing additional security measures to mitigate the risk of exploitation. Continuous monitoring and proactive security measures are essential to safeguard against such vulnerabilities in the future.