EUVD-2024-49119

Comprehensive Technical Analysis of EUVD-2024-49119

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-49119 affects the GiveWP – Donation Plugin and Fundraising Platform for WordPress. It is classified as a PHP Object Injection vulnerability, which allows unauthenticated attackers to inject PHP objects via deserialization of untrusted input through parameters like 'give_title' and 'card_address'. The presence of a Property-Oriented Programming (POP) chain enables attackers to delete arbitrary files and achieve remote code execution (RCE).

Severity Evaluation:

• CVSS Base Score: 10.0 (Critical)
• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

The high severity score indicates that this vulnerability poses a significant risk. The attack vector is network-based (AV:N), requires low complexity (AC:L), does not need user interaction (UI:N), and has a high impact on confidentiality, integrity, and availability (C:H/I:H/A:H).

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Access: Attackers can exploit this vulnerability without needing to authenticate.
• Deserialization of Untrusted Input: The vulnerability arises from the deserialization of user-controlled input, which can be manipulated to inject malicious PHP objects.
• POP Chain Exploitation: The presence of a POP chain allows attackers to manipulate object properties to achieve RCE.

Exploitation Methods:

• Crafting Malicious Input: Attackers can craft specific input values for parameters like 'give_title' and 'card_address' to inject PHP objects.
• Bypassing Security Checks: The use of stripslashes_deep on user_info allows attackers to bypass the is_serialized check, facilitating the injection.
• Arbitrary File Deletion: By exploiting the POP chain, attackers can delete critical system files, leading to denial of service (DoS).
• Remote Code Execution: Attackers can execute arbitrary code on the server, leading to complete system compromise.

3. Affected Systems and Software Versions

Affected Software:

• GiveWP – Donation Plugin and Fundraising Platform
• Versions: All versions up to and including 3.16.1

Patched Versions:

• Initial Patch: Version 3.16.1
• Further Hardening: Version 3.16.2

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Plugin: Immediately update the GiveWP plugin to version 3.16.2 or later.
• Disable Plugin: If updating is not possible, consider disabling the plugin until a patch can be applied.

Long-Term Mitigations:

• Regular Updates: Ensure all WordPress plugins and themes are regularly updated.
• Input Validation: Implement strict input validation and sanitization to prevent injection attacks.
• Security Plugins: Use security plugins like Wordfence to monitor and protect against vulnerabilities.
• Web Application Firewall (WAF): Deploy a WAF to filter out malicious requests.
• Regular Audits: Conduct regular security audits and code reviews to identify and mitigate vulnerabilities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations using the GiveWP plugin, particularly those involved in fundraising and donations. The potential for RCE and arbitrary file deletion can lead to data breaches, financial loss, and reputational damage. Given the critical nature of the vulnerability, it underscores the importance of timely patching and robust security practices in the European cybersecurity landscape.

6. Technical Details for Security Professionals

Vulnerability Details:

• Deserialization Issue: The vulnerability stems from the deserialization of untrusted input, which can be manipulated to inject PHP objects.
• POP Chain: The presence of a POP chain allows attackers to manipulate object properties to achieve RCE.
• Bypass Mechanism: The use of stripslashes_deep on user_info allows the is_serialized check to be bypassed, facilitating the injection.

Code References:

• Vulnerable Code:
  • process-donation.php (Line 154 in version 3.16.0)
  • admin-actions.php
  • Utils.php

Patch Details:

• Initial Patch (3.16.1): Addressed the deserialization issue but required further hardening.
• Further Hardening (3.16.2): Enhanced security measures to prevent bypassing the is_serialized check.

References:

• Wordfence Threat Intelligence
• WordPress Plugin Repository
• Patch Changesets

By understanding the technical details and implementing the recommended mitigations, organizations can effectively protect against this critical vulnerability and enhance their overall cybersecurity posture.