EUVD-2025-205327

Comprehensive Technical Analysis of EUVD-2025-205327

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-205327 pertains to hardcoded default credentials in Microhard Systems IPn4G 1.1.0. These credentials cannot be changed through normal gateway operations, posing a significant security risk. The CVSS (Common Vulnerability Scoring System) base score of 9.3 indicates a critical severity level. The CVSS vector 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 highlights the following:

• Attack Vector (AV:N): Network, meaning the vulnerability is exploitable remotely.
• Attack Complexity (AC:L): Low, indicating that the attack is relatively straightforward.
• Privileges Required (PR:N): None, meaning no special privileges are needed to exploit the vulnerability.
• User Interaction (UI:N): None, indicating that no user interaction is required.
• Confidentiality (VC:H): High impact on confidentiality.
• Integrity (VI:H): High impact on integrity.
• Availability (VA:H): High impact on availability.

2. Potential Attack Vectors and Exploitation Methods

Attackers can exploit this vulnerability by:

• Network Scanning: Identifying devices with the vulnerable firmware version.
• Credential Stuffing: Using the predefined username and password combinations to gain unauthorized access.
• Automated Scripts: Deploying automated scripts to scan for and exploit devices with default credentials.

Once access is gained, attackers can:

• Gain Root-Level Access: Execute commands with elevated privileges.
• Data Exfiltration: Access and exfiltrate sensitive data.
• Malware Deployment: Install malware or backdoors for persistent access.
• Service Disruption: Modify configurations to disrupt services or cause denial of service (DoS).

3. Affected Systems and Software Versions

The vulnerability affects:

• Product: Microhard Systems 3G/4G Cellular Ethernet and Serial Gateway
• Version: IPn4G 1.1.0 build 1098

4. Recommended Mitigation Strategies

To mitigate this vulnerability, the following steps are recommended:

• Firmware Update: Immediately update to a patched version of the firmware if available.
• Credential Management: Implement a mechanism to change default credentials, if possible.
• Network Segmentation: Isolate vulnerable devices on a separate network segment to limit exposure.
• Access Control: Implement strict access controls and monitoring to detect unauthorized access attempts.
• Regular Audits: Conduct regular security audits to identify and remediate vulnerabilities.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activities.

5. Impact on European Cybersecurity Landscape

The presence of hardcoded default credentials in widely used devices like the Microhard Systems IPn4G poses a significant risk to European cybersecurity. This vulnerability can be exploited to compromise critical infrastructure, industrial control systems, and other sensitive environments. The potential for widespread exploitation underscores the need for robust cybersecurity measures and continuous monitoring.

6. Technical Details for Security Professionals

Detection:

• Network Traffic Analysis: Monitor for unusual login attempts or traffic patterns indicative of credential stuffing.
• Log Analysis: Review device logs for unauthorized access attempts or successful logins using default credentials.

Exploitation:

• Tools: Exploit scripts and tools available on platforms like Exploit-DB can be used to automate the exploitation process.
• Techniques: Attackers may use techniques such as brute-forcing, dictionary attacks, or leveraging known default credentials.

Remediation:

• Patch Management: Ensure that all devices are updated to the latest firmware version.
• Configuration Hardening: Implement best practices for device configuration to minimize attack surfaces.
• Incident Response: Develop and maintain an incident response plan to quickly address and mitigate any detected exploitation attempts.

References:

• NVD CVE-2018-25147
• Exploit-DB Entry
• Zero Science Vulnerability Report
• Microhard Systems Official Website

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of unauthorized access and potential data breaches.