EUVD-2025-15974

Comprehensive Technical Analysis of EUVD-2025-15974

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2025-15974 pertains to a stack overflow in the web_radiusSrv_post function via the radIpkey parameter in FW-WGS-804HPT v1.305b241111. 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 complete loss of confidentiality.
• Integrity (I): High (H) - The vulnerability results in a complete loss of integrity.
• Availability (A): High (H) - The vulnerability results in a complete loss of availability.

Given these metrics, the vulnerability poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

The stack overflow vulnerability in the web_radiusSrv_post function can be exploited through the following methods:

• Remote Code Execution (RCE): An attacker can send a specially crafted request to the web_radiusSrv_post function, causing a stack overflow. This can lead to arbitrary code execution on the affected system.
• Denial of Service (DoS): By exploiting the stack overflow, an attacker can crash the service, leading to a denial of service.
• Data Exfiltration: The vulnerability can be used to exfiltrate sensitive data by manipulating the stack to read memory contents.

3. Affected Systems and Software Versions

The vulnerability specifically affects:

• FW-WGS-804HPT v1.305b241111

Other versions of FW-WGS-804HPT may also be affected if they share the same codebase or have not been patched for this specific issue.

4. Recommended Mitigation Strategies

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

• Patch Management: Ensure that all affected systems are updated to a patched version of FW-WGS-804HPT as soon as it becomes available.
• Network Segmentation: Implement network segmentation to limit the exposure of vulnerable systems to potential attackers.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor network traffic for suspicious activities that may indicate an attempt to exploit this vulnerability.
• Input Validation: Implement strict input validation and sanitization for all parameters, especially radIpkey, to prevent stack overflows.
• Access Controls: Restrict access to the web_radiusSrv_post function to trusted users and systems only.

5. Impact on European Cybersecurity Landscape

The critical nature of this vulnerability poses a significant threat to the European cybersecurity landscape. Organizations relying on FW-WGS-804HPT for network security, particularly those using RADIUS for authentication, are at high risk. The potential for remote code execution and data exfiltration can lead to severe breaches, impacting confidentiality, integrity, and availability of critical systems.

6. Technical Details for Security Professionals

• Vulnerability Type: Stack Overflow
• Affected Function: web_radiusSrv_post
• Parameter: radIpkey
• Exploitation: The vulnerability can be triggered by sending a maliciously crafted request to the web_radiusSrv_post function, causing a stack overflow.
• Detection: Monitor network traffic for unusual patterns or payloads targeting the radIpkey parameter. Implement logging and alerting mechanisms to detect and respond to potential exploitation attempts.
• Remediation: Apply patches provided by the vendor. Conduct thorough code reviews and implement secure coding practices to prevent similar vulnerabilities in the future.

Conclusion

EUVD-2025-15974 represents a critical vulnerability that requires immediate attention from cybersecurity professionals. Organizations should prioritize patching affected systems, implementing robust security controls, and monitoring for potential exploitation attempts. The high severity of this vulnerability underscores the importance of proactive cybersecurity measures to protect against significant risks to network security and data integrity.