EUVD-2024-49340

Comprehensive Technical Analysis of EUVD-2024-49340

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in the WooEvents - Calendar and Event Booking plugin for WordPress (EUVD-2024-49340) is an arbitrary file overwrite issue due to insufficient file path validation in the inc/barcode.php file. This vulnerability affects all versions up to and including 4.1.2. The severity of this vulnerability is rated with a CVSS Base Score of 9.1, which is considered critical.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low skill or resources.
• PR:N (No Privileges Required): No authentication is needed to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required.
• S:U (Unchanged Scope): The vulnerability does not change the security scope.
• C:N (No Confidentiality Impact): There is no direct impact on confidentiality.
• I:H (High Integrity Impact): The integrity of the system is highly impacted.
• A:H (High Availability Impact): The availability of the system is highly impacted.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Remote Attack: An attacker can exploit this vulnerability without needing any credentials, making it a high-risk vector.
• File Overwrite: The attacker can overwrite critical files such as wp-config.php, which contains database credentials and other sensitive information.

Exploitation Methods:

• Remote Code Execution (RCE): By overwriting files like wp-config.php, an attacker can inject malicious code, leading to RCE.
• Data Manipulation: Overwriting other critical files can lead to data manipulation and integrity issues.
• Denial of Service (DoS): Overwriting essential files can render the WordPress site inoperable, leading to a DoS condition.

3. Affected Systems and Software Versions

Affected Systems:

• WordPress installations using the WooEvents - Calendar and Event Booking plugin.

Affected Software Versions:

• All versions of the WooEvents - Calendar and Event Booking plugin up to and including 4.1.2.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Ensure that the WooEvents - Calendar and Event Booking plugin is updated to a version higher than 4.1.2.
• Disable the Plugin: If an update is not immediately available, consider disabling the plugin until a patched version is released.

Long-Term Mitigation:

• Regular Updates: Implement a regular update schedule for all plugins and themes.
• Access Controls: Restrict access to the WordPress admin panel and critical files.
• Monitoring: Use security plugins like Wordfence to monitor for suspicious activities and vulnerabilities.
• Backup: Regularly back up the WordPress site to ensure quick recovery in case of an attack.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using WordPress with the affected plugin. Given the widespread use of WordPress, this vulnerability could lead to large-scale compromises, including data breaches, RCE, and DoS attacks. The high EPSS score of 1 indicates a high likelihood of exploitation, further emphasizing the need for immediate action.

6. Technical Details for Security Professionals

Vulnerable Component:

• The vulnerability resides in the inc/barcode.php file of the WooEvents - Calendar and Event Booking plugin.

Exploitation Details:

• The insufficient file path validation allows an attacker to specify arbitrary file paths, leading to file overwrites.
• Example of a potential exploit: An attacker could send a crafted HTTP request to overwrite the wp-config.php file with malicious content.

Detection and Response:

• Log Analysis: Monitor server logs for unusual file access patterns and HTTP requests targeting the inc/barcode.php file.
• File Integrity Monitoring: Use file integrity monitoring tools to detect unauthorized changes to critical files.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious activities related to this vulnerability.

References:

• Wordfence Threat Intelligence
• WooEvents Plugin on CodeCanyon

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of exploitation and protect their WordPress installations from potential attacks.