EUVD-2023-34881

Comprehensive Technical Analysis of EUVD-2023-34881

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Overview: The vulnerability EUVD-2023-34881 affects Milesight 4K/H.265 Series NVR models due to a weak password reset mechanism in the web-based management interface. This flaw allows a remote attacker to exploit the vulnerability by sending specially crafted HTTP requests, potentially leading to account takeover.

Severity Evaluation: The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical vulnerability. The scoring vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 and resources.
• Privileges Required (PR): None (N) - No privileges are required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not affect resources beyond the security scope managed by the security authority.
• Confidentiality (C): High (H) - Complete loss of confidentiality.
• Integrity (I): High (H) - Complete loss of integrity.
• Availability (A): High (H) - Complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send crafted HTTP requests to the web-based management interface of the affected NVR devices.
• Automated Scripts: Attackers can use automated scripts to scan for vulnerable devices and exploit them en masse.

Exploitation Methods:

• Password Reset Exploit: By sending specially crafted HTTP requests, an attacker can trigger a password reset, gaining unauthorized access to the device.
• Credential Stuffing: Once access is gained, attackers can use the compromised credentials to perform further malicious activities.

3. Affected Systems and Software Versions

Affected Models:

• MS-Nxxxx-xxG
• MS-Nxxxx-xxE
• MS-Nxxxx-xxT
• MS-Nxxxx-xxH
• MS-Nxxxx-xxC

Affected Software Versions:

• MS-Nxxxx-xxE: 75.X < 75.9.0.18-r2
• MS-Nxxxx-xxT: 72.X < 72.9.0.18-r2
• MS-Nxxxx-xxC: 73.X < 73.9.0.18-r2
• MS-Nxxxx-xxH: 71.X < 71.9.0.18-r2
• MS-Nxxxx-xxG: 77.X < 77.9.0.18-r2

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Management: Ensure all affected devices are updated to the latest firmware versions that address this vulnerability.
• Network Segmentation: Isolate NVR devices from public networks to limit exposure.
• Access Control: Implement strict access controls and use strong, unique passwords for all devices.
• Monitoring: Enable logging and monitoring to detect any unusual activity or unauthorized access attempts.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• User Training: Educate users on the importance of strong passwords and the risks associated with weak password reset mechanisms.
• Incident Response Plan: Develop and maintain an incident response plan to quickly address any security breaches.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• GDPR: Unauthorized access to NVR devices could lead to data breaches, violating GDPR regulations and resulting in significant fines.
• NIS Directive: Organizations in critical sectors must ensure the security of their network and information systems, making this vulnerability a significant concern.

Industry Impact:

• Surveillance and Security: Compromised NVR devices can lead to the loss of critical surveillance data, impacting physical security.
• Reputation: Organizations using vulnerable devices may face reputational damage if a breach occurs.

6. Technical Details for Security Professionals

Detection:

• Network Traffic Analysis: Monitor for unusual HTTP requests targeting the NVR web-based management interface.
• Log Analysis: Review device logs for any unauthorized password reset attempts or successful logins from unknown sources.

Exploitation:

• HTTP Request Crafting: Attackers may use tools like Burp Suite or custom scripts to craft and send malicious HTTP requests.
• Automated Tools: Exploitation frameworks like Metasploit may include modules for this vulnerability, allowing for automated exploitation.

Mitigation:

• Firewall Rules: Implement firewall rules to block unauthorized access to the NVR management interface.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious activity targeting the NVR devices.

Conclusion: The vulnerability EUVD-2023-34881 poses a significant risk to organizations using Milesight NVR devices. Immediate patching and implementation of robust security measures are essential to mitigate the risk of unauthorized access and potential data breaches. Regular monitoring and adherence to best security practices will help maintain the integrity and confidentiality of surveillance data.