EUVD-2024-43773

Comprehensive Technical Analysis of EUVD-2024-43773

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-43773, also known as CVE-2024-49649, is classified as a "PHP Remote File Inclusion" vulnerability affecting the "Build App Online" plugin. This vulnerability arises from improper control of filenames for include/require statements in PHP, leading to Local File Inclusion (LFI) attacks.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• 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 vector string highlights the following characteristics:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This vulnerability can be exploited remotely with low complexity, requiring no privileges or user interaction, and can lead to high impacts on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote File Inclusion (RFI): An attacker can manipulate the include/require statements to include remote files, potentially leading to arbitrary code execution.
• Local File Inclusion (LFI): An attacker can manipulate the include/require statements to include local files, potentially leading to information disclosure or arbitrary code execution.

Exploitation Methods:

• URL Manipulation: Attackers can craft URLs that include malicious file paths, leading to the inclusion of remote or local files.
• Directory Traversal: Attackers can use directory traversal techniques to access sensitive files on the server.
• Code Injection: By including remote files, attackers can inject and execute malicious code on the server.

3. Affected Systems and Software Versions

Affected Software:

• Product: Build App Online
• Versions: From n/a through 1.0.23

All versions of the "Build App Online" plugin up to and including 1.0.23 are affected by this vulnerability.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Upgrade to a patched version of the "Build App Online" plugin if available.
• Input Validation: Implement strict input validation and sanitization for all user-supplied data.
• Access Controls: Restrict access to sensitive files and directories.
• Web Application Firewall (WAF): Deploy a WAF to detect and block malicious requests.

Long-Term Mitigation:

• Code Review: Conduct a thorough code review to identify and fix similar vulnerabilities.
• Security Training: Provide security training for developers to prevent future occurrences of such vulnerabilities.
• Regular Updates: Ensure that all plugins and dependencies are regularly updated to the latest versions.

5. Impact on European Cybersecurity Landscape

The presence of this vulnerability in a widely used plugin can have significant implications for the European cybersecurity landscape:

• Data Breaches: Organizations using the affected plugin are at risk of data breaches, leading to potential GDPR violations and financial penalties.
• Reputation Damage: Compromised websites can suffer reputational damage and loss of customer trust.
• Operational Disruption: Successful exploitation can lead to operational disruptions, including service outages and data loss.

6. Technical Details for Security Professionals

Vulnerability Details:

• Vulnerability Type: PHP Remote File Inclusion (RFI) and Local File Inclusion (LFI)
• Root Cause: Improper control of filenames for include/require statements in PHP
• Exploitability: High, due to low complexity and no required privileges or user interaction

Detection and Monitoring:

• Log Analysis: Monitor server logs for suspicious include/require statements and unusual file access patterns.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on potential RFI/LFI attempts.
• File Integrity Monitoring: Use file integrity monitoring tools to detect unauthorized changes to critical files.

Incident Response:

• Containment: Isolate affected systems to prevent further spread of the attack.
• Eradication: Remove any malicious files and patch the vulnerability.
• Recovery: Restore systems to a known good state and ensure all data is backed up.
• Post-Incident Analysis: Conduct a thorough analysis to understand the attack vector and improve defenses.

References:

• Patchstack Vulnerability Database

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