EUVD-2024-42907

Comprehensive Technical Analysis of EUVD-2024-42907

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-42907, also known as CVE-2024-48035, is classified as an "Unrestricted Upload of File with Dangerous Type" vulnerability in the Takayuki Imanishi ACF Images Search And Insert plugin. This vulnerability allows an attacker to upload a web shell to a web server, potentially leading to full server compromise. The CVSS (Common Vulnerability Scoring System) base score of 9.9 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): Low (L) - The attacker needs low-level privileges to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Changed (C) - The vulnerability affects resources beyond the security scope managed by the security authority.
• Confidentiality (C): High (H) - There is a high impact on the confidentiality of the system.
• Integrity (I): High (H) - There is a high impact on the integrity of the system.
• Availability (A): High (H) - There is a high impact on the availability of the system.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves uploading a malicious file, such as a web shell, through the vulnerable plugin. This can be achieved by:

• Direct File Upload: An attacker can directly upload a web shell through the plugin's file upload functionality.
• Phishing: Tricking an authorized user into uploading a malicious file.
• Automated Scripts: Using automated scripts to exploit the vulnerability on a large scale.

Once a web shell is uploaded, the attacker can execute arbitrary commands on the server, leading to further exploitation such as data exfiltration, lateral movement, and persistence.

3. Affected Systems and Software Versions

The vulnerability affects the ACF Images Search And Insert plugin versions from n/a through 1.1.4. Any WordPress site using this plugin within the specified version range is at risk.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following steps should be taken:

• Update the Plugin: Ensure that the ACF Images Search And Insert plugin is updated to a version that addresses this vulnerability.
• Disable Unnecessary Features: If the file upload feature is not essential, consider disabling it.
• Implement File Upload Validation: Ensure that only safe file types are allowed for upload.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments.
• Monitor for Suspicious Activity: Implement monitoring to detect and respond to any suspicious file uploads or activities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using the affected plugin. Given the critical nature of the vulnerability, it could lead to widespread compromises if not addressed promptly. The potential for data breaches, financial loss, and reputational damage is high.

6. Technical Details for Security Professionals

• Detection: Implement file integrity monitoring (FIM) to detect unauthorized file changes. Use web application firewalls (WAF) to block suspicious uploads.
• Response: In case of a detected exploitation, immediately isolate the affected server, conduct a forensic analysis, and restore from a clean backup.
• Prevention: Regularly update all plugins and themes. Use security plugins to enhance WordPress security. Implement strict access controls and regularly review user permissions.

Conclusion

The EUVD-2024-42907 vulnerability in the Takayuki Imanishi ACF Images Search And Insert plugin is a critical issue that requires immediate attention. Organizations should prioritize updating the plugin and implementing robust security measures to prevent exploitation. The potential impact on the European cybersecurity landscape underscores the importance of proactive cybersecurity practices.

For further details, refer to the Patchstack vulnerability database.