EUVD-2024-48891

Comprehensive Technical Analysis of EUVD-2024-48891

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The Ultimate Store Kit Elementor Addons, Woocommerce Builder, EDD Builder, Elementor Store Builder, Product Grid, Product Table, Woocommerce Slider plugin is vulnerable to PHP Object Injection via deserialization of untrusted input through the _ultimate_store_kit_wishlist cookie. This vulnerability affects versions up to and including 2.0.3.

Severity Evaluation:

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

The CVSS score of 9.8 indicates a critical vulnerability. The high severity is due to the potential for unauthenticated attackers to exploit the vulnerability remotely with low complexity, leading to high impacts on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Attack: An attacker can exploit this vulnerability without needing any authentication.
• Deserialization of Untrusted Input: The attacker can inject malicious PHP objects by manipulating the _ultimate_store_kit_wishlist cookie.

Exploitation Methods:

• PHP Object Injection: The attacker can craft a specially designed cookie that, when deserialized, injects a PHP object.
• POP Chain Exploitation: Although no POP (Property-Oriented Programming) chain is present in the vulnerable plugin itself, if another plugin or theme with a POP chain is installed, the attacker can leverage it to achieve more severe impacts such as arbitrary file deletion, sensitive data retrieval, or code execution.

3. Affected Systems and Software Versions

Affected Software:

• Ultimate Store Kit Elementor Addons, Woocommerce Builder, EDD Builder, Elementor Store Builder, Product Grid, Product Table, Woocommerce Slider plugin

Affected Versions:

• All versions up to and including 2.0.3

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Ensure that the plugin is updated to a version higher than 2.0.3, where the vulnerability has been patched.
• Disable the Plugin: If an update is not immediately available, consider disabling the plugin until a patch is released.

Long-Term Mitigation:

• Regular Updates: Implement a regular update schedule for all plugins and themes to ensure that vulnerabilities are patched promptly.
• Input Validation: Ensure that all input, including cookies, is properly validated and sanitized.
• Security Plugins: Use security plugins that can detect and block suspicious activities, such as unauthorized deserialization attempts.

5. Impact on European Cybersecurity Landscape

Impact Assessment:

• Widespread Use: Given the popularity of WordPress and the widespread use of e-commerce plugins, this vulnerability poses a significant risk to a large number of websites in Europe.
• Data Breaches: The potential for sensitive data retrieval and arbitrary file deletion can lead to data breaches and loss of critical information.
• Compliance Risks: Organizations may face compliance issues with regulations such as GDPR if sensitive user data is compromised.

Regulatory Considerations:

• GDPR Compliance: Ensure that any data breaches are reported to the relevant authorities within the mandated timeframe.
• Incident Response: Have an incident response plan in place to quickly address and mitigate any potential breaches.

6. Technical Details for Security Professionals

Technical Analysis:

• Deserialization Vulnerability: The vulnerability arises from the deserialization of untrusted input from the _ultimate_store_kit_wishlist cookie. This can lead to PHP Object Injection if the input is not properly sanitized.
• POP Chain: Although the vulnerable plugin does not contain a POP chain, the presence of such a chain in other installed plugins or themes can exacerbate the impact.

Detection and Monitoring:

• Log Analysis: Monitor logs for unusual activities related to deserialization and PHP object injection.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious activities that may indicate an exploitation attempt.

Patch Analysis:

• Code Review: Conduct a thorough code review of the plugin to ensure that all deserialization processes are secure.
• Patch Verification: Verify that the patch effectively mitigates the vulnerability by testing the updated plugin in a controlled environment.

Conclusion: The vulnerability in the Ultimate Store Kit Elementor Addons plugin is critical and requires immediate attention. Organizations should prioritize updating the plugin and implementing robust security measures to protect against potential exploitation. The impact on the European cybersecurity landscape underscores the need for vigilant monitoring and compliance with regulatory requirements.