EUVD-2023-60231

Comprehensive Technical Analysis of EUVD-2023-60231

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in the Screen SFT DAB 600/C firmware version 1.9.3 is a session management flaw that allows attackers to bypass authentication controls. This vulnerability is rated with a CVSS (Common Vulnerability Scoring System) base score of 9.3, indicating a critical severity level. The CVSS vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N breaks down as follows:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low skill or resources.
• AT:N (No Authentication): No authentication is required to exploit the vulnerability.
• PR:N (No Privileges Required): No privileges are required to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required to exploit the vulnerability.
• VC:H (High Confidentiality Impact): The vulnerability has a high impact on confidentiality.
• VI:H (High Integrity Impact): The vulnerability has a high impact on integrity.
• VA:H (High Availability Impact): The vulnerability has a high impact on availability.
• SC:N (Scope Change: None): The vulnerability does not change the security scope.
• SI:N (Scope Integrity: None): The vulnerability does not affect the integrity of the security scope.
• SA:N (Scope Availability: None): The vulnerability does not affect the availability of the security scope.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves exploiting the IP address session binding mechanism. An attacker can reuse the same IP address to issue unauthorized requests to the userManager API, thereby changing user passwords without proper authentication. This can be achieved through:

• Network Scanning: Identifying devices with the vulnerable firmware.
• IP Spoofing: Reusing the same IP address to maintain session continuity.
• API Exploitation: Crafting and sending unauthorized requests to the userManager API to change user passwords.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• Device: Screen SFT DAB 600/C
• Firmware Version: 1.9.3

Other versions of the firmware may also be affected, but this has not been confirmed in the provided entry.

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following strategies are recommended:

• Firmware Update: Immediately update the firmware to a patched version if available.
• Network Segmentation: Isolate vulnerable devices from critical networks to limit potential attack vectors.
• Access Controls: Implement strict access controls and monitor network traffic for unusual activity.
• API Security: Enhance API security by implementing additional authentication and authorization mechanisms.
• Regular Audits: Conduct regular security audits and vulnerability assessments.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations using the affected device. The potential for unauthorized access and password changes can lead to data breaches, service disruptions, and loss of confidentiality, integrity, and availability. This underscores the importance of timely patch management and robust security practices.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2023-53969
• Assigner: VulnCheck
• References:
  • Exploit Database
  • DB Broadcast
  • Product Information
  • Zero Science Vulnerability Report
  • VulnCheck Advisory
  • NVD Detail

ENISA IDs:

• Product: 809cf9d7-f6b1-3f34-b984-5cbe9a55bbaa (Screen SFT DAB 600/C)
• Vendor: 61655c9f-33c7-378d-81d7-f5d6442f3de4 (DB Elettronica Telecomunicazioni SpA)

Exploitation Steps:

1. Identify the target device with firmware version 1.9.3.
2. Use network scanning tools to determine the IP address of the device.
3. Craft a request to the userManager API with the same IP address to bypass authentication.
4. Change user passwords to gain unauthorized access.

Detection and Monitoring:

• Implement network monitoring tools to detect unusual API requests.
• Use intrusion detection systems (IDS) to identify and alert on suspicious activities.
• Regularly review logs for unauthorized access attempts and successful password changes.

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their critical assets.