EUVD-2024-27021

Comprehensive Technical Analysis of EUVD-2024-27021

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability EUVD-2024-27021 affects the Artica Proxy, specifically versions 4.50 and unspecified versions. The "tailon" service, which is running as the root user and bound to the loopback interface, is inadvertently accessible through the proxy service. This service listens on TCP port 7050 and allows unauthorized access to any file on the Artica Proxy.

Severity Evaluation: The Base Score of 9.8 (CVSS:3.1) indicates a critical vulnerability. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• AV:N (Network): The vulnerability is exploitable over the network.
• AC:L (Low): The attack complexity is low.
• PR:N (None): No privileges are required to exploit the vulnerability.
• UI:N (None): No user interaction is required.
• S:U (Unchanged): The scope is unchanged.
• C:H (High): Confidentiality impact is high.
• I:H (High): Integrity impact is high.
• A:H (High): Availability impact is high.

This high severity score underscores the critical nature of the vulnerability, which can lead to complete system compromise.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Access: An attacker can remotely access the "tailon" service through the proxy service.
• File Access: The attacker can read any file on the Artica Proxy, including sensitive configuration files, logs, and potentially executable files.

Exploitation Methods:

• Network Scanning: An attacker can scan for open TCP port 7050 on the Artica Proxy.
• Service Interaction: Once the port is identified, the attacker can interact with the "tailon" service to read files.
• Privilege Escalation: Given that the service runs as root, the attacker can potentially escalate privileges to gain full control over the system.

3. Affected Systems and Software Versions

Affected Systems:

• Artica Proxy version 4.50
• Potentially other unspecified versions of Artica Proxy

Vendor:

• Artica Tech

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Apply the latest patches and updates provided by Artica Tech.
• Firewall Rules: Implement strict firewall rules to block access to TCP port 7050.
• Service Restriction: Ensure that the "tailon" service is not accessible through the proxy service.

Long-Term Actions:

• Regular Audits: Conduct regular security audits to identify and mitigate similar vulnerabilities.
• Access Control: Implement robust access control mechanisms to restrict unauthorized access.
• Monitoring: Continuously monitor network traffic for suspicious activities.

5. Impact on European Cybersecurity Landscape

Impact:

• Data Breach: The vulnerability can lead to significant data breaches, exposing sensitive information.
• System Compromise: Complete system compromise can disrupt services and lead to financial and operational losses.
• Compliance Issues: Non-compliance with data protection regulations such as GDPR can result in legal and financial penalties.

Broader Implications:

• Supply Chain Risks: Organizations using Artica Proxy as part of their supply chain may face indirect risks.
• Reputation Damage: Affected organizations may suffer reputational damage due to data breaches and service disruptions.

6. Technical Details for Security Professionals

Service Details:

• Service Name: tailon
• Port: TCP 7050
• User: root
• Interface: Loopback

References:

• KoreLogic Advisory: KL-001-2024-004.txt
• GitHub Repository: gvalkov's 'tailon' GitHub repo
• Full Disclosure: Seclists.org

Aliases:

• CVE-2024-2056
• GSD-2024-2056

Assigner:

• AHA

ENISA IDs:

• Product: Artica Proxy (versions 4.50 and unspecified)
• Vendor: Artica Tech

Conclusion: The vulnerability EUVD-2024-27021 poses a significant risk to organizations using the Artica Proxy. Immediate mitigation steps, including patching and restricting access, are crucial to prevent potential data breaches and system compromises. Regular security audits and continuous monitoring are essential to maintain a robust cybersecurity posture.