EUVD-2025-3041

Comprehensive Technical Analysis of EUVD-2025-3041

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-3041 pertains to a stack overflow in RE11S v1.11, specifically within the setWAN function via the pptpUserName parameter. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The CVSS 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 or resources.
• Privileges Required (PR): None (N) - No special privileges are needed to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability results in a high impact on confidentiality.
• Integrity (I): High (H) - The vulnerability results in a high impact on integrity.
• Availability (A): High (H) - The vulnerability results in a high impact on availability.

Given these metrics, the vulnerability is highly critical and poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The stack overflow vulnerability in the setWAN function can be exploited by sending a specially crafted pptpUserName parameter. Potential attack vectors include:

• Remote Exploitation: An attacker can send malicious packets over the network to trigger the stack overflow.
• Buffer Overflow: By sending an excessively long pptpUserName, the attacker can overwrite adjacent memory, potentially leading to arbitrary code execution.
• Denial of Service (DoS): The stack overflow can cause the application to crash, resulting in a denial of service.

Exploitation methods may involve crafting a payload that overwrites the return address on the stack, allowing the attacker to execute arbitrary code or gain control of the affected system.

3. Affected Systems and Software Versions

The vulnerability specifically affects RE11S v1.11. Any system running this version of the software is at risk. This includes:

• Routers and Network Devices: Devices using RE11S v1.11 for WAN configuration.
• Embedded Systems: Any embedded system utilizing RE11S v1.11 for network management.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Patch Management: Immediately apply any available patches or updates from the vendor.
• Network Segmentation: Isolate affected devices from critical networks to limit the potential impact of an attack.
• Input Validation: Implement strict input validation to ensure that the pptpUserName parameter does not exceed expected lengths.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity that may indicate an exploitation attempt.
• Firewall Rules: Configure firewalls to restrict access to the setWAN function to trusted sources only.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant threat to the European cybersecurity landscape, particularly for organizations and individuals relying on RE11S v1.11 for network management. The potential for remote code execution and denial of service can lead to:

• Data Breaches: Unauthorized access to sensitive information.
• Service Disruptions: Interruption of critical services due to DoS attacks.
• Compliance Issues: Non-compliance with data protection regulations such as GDPR.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerability Identification: The vulnerability is identified as CVE-2025-22904 and EUVD-2025-3041.
• Exploit Code: The GitHub repository (https://github.com/xyqer1/RE11S_1.11-setWAN-3-StackOverflow) may contain proof-of-concept exploit code.
• References: Additional information can be found at the provided references, including the vendor's website (http://re11s.com) and the Edimax website (https://www.edimax.com/edimax/global/).

Security professionals should prioritize the identification and remediation of this vulnerability in their environments. Regular monitoring and updating of network devices are essential to maintain a robust security posture.

Conclusion

EUVD-2025-3041 represents a critical vulnerability that requires immediate attention. Organizations should implement the recommended mitigation strategies and stay vigilant for any updates or patches from the vendor. The potential impact on the European cybersecurity landscape underscores the importance of proactive security measures.