EUVD-2025-19048

Comprehensive Technical Analysis of EUVD-2025-19048

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The EUVD entry EUVD-2025-19048 describes an OS Command Injection vulnerability affecting multiple wireless router models from Sapido. This vulnerability allows unauthenticated remote attackers to inject and execute arbitrary OS commands on the server.

Severity Evaluation: The vulnerability has a CVSS Base Score of 9.3, which is considered critical. 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) indicates the following:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Authentication (AT): None (N)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Confidentiality Impact (VC): High (H)
• Integrity Impact (VI): High (H)
• Availability Impact (VA): High (H)
• Scope Change (SC): None (N)
• Scope Impact (SI): None (N)
• Scope Availability (SA): None (N)

The high scores for confidentiality, integrity, and availability impacts underscore the critical nature of this vulnerability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: Attackers can exploit this vulnerability over the network without needing to be on the same local network as the device.
• Unauthenticated Access: The vulnerability does not require any authentication, making it easier for attackers to exploit.

Exploitation Methods:

• Command Injection: Attackers can inject malicious OS commands through vulnerable input fields, such as web interfaces or API endpoints.
• Automated Scripts: Attackers can use automated scripts to scan for vulnerable devices and execute commands en masse.

3. Affected Systems and Software Versions

Affected Models:

• BRE70n (Version 0)
• BR270n (Version 0)
• BR071n (Version 0)
• BR261c (Version 0)
• BRE71n (Version 0)
• BRC76n (Version 0)
• BRF61c (Version 0)
• BRF71n (Version 0)
• BRD70n (Version 0)
• BR476n (Version 0)
• BRC70x (Version 0)
• BRC70n (Version 0)

Vendor:

• Sapido

Note: All affected models are out of support, which complicates the mitigation process.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Replace the Device: Given that the affected models are out of support, the most effective mitigation is to replace the devices with supported and secure alternatives.
• Network Segmentation: Isolate vulnerable devices on a separate network segment to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the vulnerable devices.

Long-Term Mitigation:

• Regular Updates: Ensure that all network devices are regularly updated and supported by the vendor.
• Security Audits: Conduct regular security audits to identify and mitigate vulnerabilities.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activities and potential exploitation attempts.

5. Impact on European Cybersecurity Landscape

Regional Impact:

• Widespread Use: If these router models are widely used in European households and businesses, the impact could be significant.
• Critical Infrastructure: Vulnerabilities in network devices can affect critical infrastructure, leading to potential disruptions in services.
• Data Breaches: The high confidentiality and integrity impact scores suggest that data breaches are a significant risk.

Regulatory Compliance:

• GDPR: Organizations must ensure that they comply with GDPR regulations, especially in terms of data protection and breach reporting.
• NIS Directive: Critical infrastructure providers must adhere to the Network and Information Systems (NIS) Directive to ensure robust cybersecurity measures.

6. Technical Details for Security Professionals

Detection:

• Log Analysis: Monitor logs for unusual command execution patterns.
• Network Traffic Analysis: Use network traffic analysis tools to detect anomalous traffic patterns indicative of command injection attacks.

Prevention:

• Input Validation: Ensure that all input fields are properly validated to prevent command injection.
• Least Privilege: Implement the principle of least privilege to limit the impact of potential exploits.

Response:

• Incident Response Plan: Have a well-defined incident response plan in place to quickly address any detected exploitation attempts.
• Patch Management: Although the devices are out of support, ensure that all other network devices are patched and updated regularly.

Conclusion: The OS Command Injection vulnerability in Sapido wireless routers poses a critical risk to European cybersecurity. Immediate replacement of affected devices, along with robust network security measures, is essential to mitigate this threat. Regular audits and compliance with regulatory standards will help maintain a secure cyber environment.