EUVD-2024-54888

Comprehensive Technical Analysis of EUVD-2024-54888

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-54888 is a Path Traversal issue in AllSky v2023.05.01_04. This vulnerability allows an unauthenticated attacker to create a webshell and achieve remote code execution (RCE) via the path and content parameters in the /includes/save_file.php script.

Severity Evaluation:

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

The high base score of 9.8 indicates a critical vulnerability. The CVSS vector breakdown shows that the attack can be executed over the network (AV:N), requires low complexity (AC:L), does not need any privileges (PR:N) or 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: The attacker does not need to authenticate to exploit the vulnerability.
• Network Access: The attack can be carried out remotely over the network.

Exploitation Methods:

• Path Traversal: The attacker can manipulate the path parameter to traverse directories and access files outside the intended directory.
• Webshell Creation: By manipulating the content parameter, the attacker can upload a webshell, which allows for remote code execution.
• Remote Code Execution (RCE): Once the webshell is in place, the attacker can execute arbitrary code on the server.

3. Affected Systems and Software Versions

Affected Software:

• AllSky v2023.05.01_04

Affected Systems:

• Any system running the vulnerable version of AllSky software.
• Systems that have the /includes/save_file.php script accessible over the network.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Apply the latest security patches provided by the vendor.
• Access Control: Restrict access to the /includes/save_file.php script to authorized users only.
• Input Validation: Implement strict input validation and sanitization for the path and content parameters.

Long-Term Mitigation:

• Regular Updates: Ensure that all software is regularly updated to the latest versions.
• Security Audits: Conduct regular security audits and vulnerability assessments.
• Web Application Firewalls (WAF): Deploy WAFs to detect and block malicious requests.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using AllSky software within the European Union. Given the critical nature of the vulnerability, it could lead to widespread data breaches, unauthorized access, and potential disruption of services. The high impact on confidentiality, integrity, and availability underscores the need for immediate action to mitigate the risk.

6. Technical Details for Security Professionals

Vulnerability Details:

• Vulnerable Script: /includes/save_file.php
• Parameters: path, content
• Exploitation: The attacker can manipulate the path parameter to traverse directories and the content parameter to upload a webshell.

Detection and Monitoring:

• Log Analysis: Monitor server logs for unusual access patterns to the /includes/save_file.php script.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious activities related to path traversal and webshell uploads.
• File Integrity Monitoring: Use file integrity monitoring tools to detect unauthorized changes to critical files.

References:

• AllSky GitHub Repository
• Vulnerable Script Source
• Additional Information

Aliases:

• CVE-2024-44373

Assigner:

• Mitre

EPSS:

• N/A

ENISA ID Product and Vendor:

• Product ID: 6b799f48-49bf-3b70-a54f-8d4f8f7670b0
• Vendor ID: 30b9b75e-691e-3f8a-b8e8-babde549133d

By addressing this vulnerability promptly and effectively, organizations can significantly reduce the risk of exploitation and ensure the security and integrity of their systems.