EUVD-2023-28116

Comprehensive Technical Analysis of EUVD-2023-28116

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2023-28116 pertains to the Connectize AC21000 G6 641.139.1.1256 device, specifically within its change password functionality. The issue allows attackers to gain control of the device without needing to provide the current password. This flaw is critical because it bypasses a fundamental security mechanism, enabling unauthorized access and control.

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 CVSS score of 9.8 indicates a critical vulnerability. The vector breakdown shows that the attack can be executed over the network (AV:N), requires low complexity (AC:L), does not need 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:

• Remote Exploitation: Given the network attack vector (AV:N), an attacker can exploit this vulnerability remotely over the internet.
• Unauthenticated Access: The low complexity (AC:L) and lack of required privileges (PR:N) make it easy for attackers to exploit the vulnerability without needing any special access or user interaction.

Exploitation Methods:

• Password Change Bypass: An attacker can change the device's password without knowing the current one, effectively locking out legitimate users and gaining administrative control.
• Further Compromise: Once the attacker has control, they can perform various malicious activities, such as modifying network settings, intercepting traffic, or installing malware.

3. Affected Systems and Software Versions

Affected Systems:

• Connectize AC21000 G6 Dual-Band Gigabit WiFi Router

Software Versions:

• Firmware version 641.139.1.1256

It is crucial to note that other versions of the firmware might also be affected if they share the same codebase or have not been patched for this specific vulnerability.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Ensure that the device is updated to the latest firmware version that addresses this vulnerability.
• Network Segmentation: Isolate the device on a separate network segment to limit potential attack vectors.
• Access Control: Implement strict access controls and monitor for unauthorized access attempts.

Long-Term Strategies:

• Regular Patching: Establish a routine for regularly updating firmware and software to mitigate known vulnerabilities.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security gaps.
• User Education: Educate users on the importance of strong passwords and the risks associated with unsecured devices.

5. Impact on European Cybersecurity Landscape

The vulnerability in the Connectize AC21000 G6 router poses a significant risk to European cybersecurity, particularly for home users and small businesses that rely on such devices for internet connectivity. Unauthorized access to these routers can lead to data breaches, network compromises, and potential entry points for larger-scale attacks.

Regulatory Implications:

• GDPR Compliance: Organizations must ensure that their network devices comply with GDPR regulations to protect personal data.
• NIS Directive: Critical infrastructure providers must adhere to the Network and Information Systems (NIS) Directive, which includes maintaining robust cybersecurity measures.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2023-24052
• GSD ID: GSD-2023-24052
• Assigner: Mitre

Technical Analysis:

• Change Password Functionality: The flaw resides in the password change mechanism, which does not require the current password for authentication. This allows an attacker to set a new password without any verification.
• Exploit Code: While specific exploit code is not provided, the nature of the vulnerability suggests that a simple HTTP request to the password change endpoint could be sufficient to exploit it.

References:

• NCC Group Technical Advisory

Conclusion: The vulnerability in the Connectize AC21000 G6 router is critical and requires immediate attention. Organizations and individuals using this device should prioritize updating to the latest firmware and implementing robust security measures to mitigate the risk of unauthorized access and potential data breaches.