EUVD-2024-51164

Comprehensive Technical Analysis of EUVD-2024-51164

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in the GiveWP – Donation Plugin and Fundraising Platform for WordPress (EUVD-2024-51164) is a PHP Object Injection flaw. This vulnerability arises from the deserialization of untrusted input from the donation form, specifically the 'firstName' field. The presence of a Property-Oriented Programming (POP) chain allows attackers to delete arbitrary files on the server, potentially leading to remote code execution (RCE).

Severity Evaluation:

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

The high base score indicates a critical vulnerability due to its potential for unauthenticated remote code execution, which can result in complete system compromise.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Unauthenticated Attack: An attacker can exploit this vulnerability without needing any authentication.
2. Deserialization of Untrusted Input: The attacker can inject malicious PHP objects through the 'firstName' field in the donation form.
3. POP Chain Exploitation: The presence of a POP chain allows the attacker to manipulate the deserialized object to perform unauthorized actions, such as deleting arbitrary files.

Exploitation Methods:

1. Crafting Malicious Input: The attacker crafts a specially designed input that, when deserialized, triggers the POP chain.
2. File Deletion: The attacker uses the POP chain to delete critical files, potentially leading to RCE.
3. Remote Code Execution: By deleting specific files, the attacker can manipulate the server to execute arbitrary code.

3. Affected Systems and Software Versions

Affected Software:

• GiveWP – Donation Plugin and Fundraising Platform for WordPress

Affected Versions:

• All versions up to and including 3.19.2
• Partially patched in version 3.19.3
• Fully patched in version 3.19.4

Note: Another CVE (CVE-2024-12877) was assigned for version 3.19.3, indicating that the partial patch was insufficient.

4. Recommended Mitigation Strategies

1. Immediate Patching: Upgrade to version 3.19.4 or later to ensure the vulnerability is fully mitigated.
2. Input Validation: Implement strict input validation and sanitization for all user inputs, especially those related to the donation form.
3. Disable Deserialization: Where possible, avoid using PHP's unserialize() function. Instead, use safer alternatives like JSON encoding.
4. Monitoring and Logging: Enhance monitoring and logging to detect any suspicious activities related to the donation form.
5. Regular Security Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability in the GiveWP plugin 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 critical nature of the vulnerability, unpatched systems are at high risk of being compromised. This could lead to data breaches, financial losses, and reputational damage.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type: PHP Object Injection
• Cause: Deserialization of untrusted input from the 'firstName' field in the donation form.
• Exploitability: High, due to the presence of a POP chain that allows file deletion and potential RCE.

Mitigation Steps:

1. Code Review: Conduct a thorough code review to identify and mitigate all instances of unserialize() usage.
2. Secure Coding Practices: Adopt secure coding practices, such as using JSON encoding for data serialization.
3. Patch Management: Implement a robust patch management process to ensure timely updates and patches.
4. Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activities and potential exploitation attempts.

References:

• Wordfence Threat Intelligence
• WordPress Plugin Changeset

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their digital assets.