EUVD-2025-3047

Comprehensive Technical Analysis of EUVD-2025-3047

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability EUVD-2025-3047 affects RE11S v1.11, specifically within the formPPPoESetup function. A stack overflow can be triggered via the pppUserName parameter, which can lead to arbitrary code execution, denial of service, or other unauthorized actions.

Severity Evaluation: The CVSS (Common Vulnerability Scoring System) base score is 9.8, indicating a critical severity level. 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 can be exploited remotely over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources to exploit.
• 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 affects the same security scope.
• Confidentiality (C): High (H) - The vulnerability can lead to a complete breach of confidentiality.
• Integrity (I): High (H) - The vulnerability can lead to a complete breach of integrity.
• Availability (A): High (H) - The vulnerability can lead to a complete breach of availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send specially crafted network packets containing a malicious pppUserName parameter to the vulnerable formPPPoESetup function.
• Phishing and Social Engineering: Attackers may use social engineering techniques to trick users into visiting malicious websites that exploit this vulnerability.

Exploitation Methods:

• Buffer Overflow: By sending an overly long pppUserName parameter, an attacker can overflow the stack buffer, leading to arbitrary code execution.
• Denial of Service (DoS): An attacker can crash the system by sending a specially crafted payload that causes the stack overflow.

3. Affected Systems and Software Versions

Affected Systems:

• Devices running RE11S v1.11.
• Potentially other versions of RE11S if they share the same codebase for the formPPPoESetup function.

Software Versions:

• RE11S v1.11

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Management: Apply the latest patches and updates provided by the vendor.
• Network Segmentation: Isolate affected devices from critical networks to limit the potential impact.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the vulnerable function.

Long-Term Strategies:

• Code Review: Conduct thorough code reviews to identify and fix similar vulnerabilities.
• Security Training: Educate developers on secure coding practices to prevent future stack overflow vulnerabilities.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor and detect suspicious activities related to this vulnerability.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• Organizations must comply with GDPR and other relevant regulations to ensure data protection and privacy.
• Reporting the vulnerability to national CERTs (Computer Emergency Response Teams) and other relevant authorities.

Economic Impact:

• Potential financial losses due to data breaches, service disruptions, and legal penalties.
• Increased costs for patching, monitoring, and securing affected systems.

Public Trust:

• Erosion of public trust in digital services and infrastructure if the vulnerability is widely exploited.

6. Technical Details for Security Professionals

Vulnerability Details:

• The formPPPoESetup function in RE11S v1.11 does not properly validate the length of the pppUserName parameter, leading to a stack overflow.
• The stack overflow can be exploited to overwrite the return address and execute arbitrary code.

Exploit Code:

• Refer to the GitHub repository for potential exploit code and proof-of-concept (PoC) examples: RE11S_1.11-formPPPoESetup-StackOverflow

References:

• Edimax Official Website
• RE11S Official Website

Conclusion: EUVD-2025-3047 is a critical vulnerability that requires immediate attention. Organizations should prioritize patching affected systems and implementing robust security measures to mitigate the risk. Continuous monitoring and adherence to best practices in cybersecurity are essential to protect against such vulnerabilities.