EUVD-2025-205599

Comprehensive Technical Analysis of EUVD-2025-205599

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-205599 affects the D-Link DIR-600 router, specifically versions up to 2.15WWb02. The issue resides in the HTTP Header Handler component, particularly in the file hedwig.cgi. The vulnerability is a stack-based buffer overflow triggered by manipulating the Cookie argument. This vulnerability is severe, with a CVSS base score of 9.3, indicating a critical risk.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability can be exploited remotely over the network.
• AC:L (Low Attack Complexity): The attack requires low skill and resources.
• AT:N (No Authentication Required): No authentication is needed to exploit the vulnerability.
• PR:N (No Privileges Required): No special privileges are required.
• UI:N (No User Interaction): No user interaction is needed for the attack to succeed.
• VC:H (High Confidentiality Impact): The vulnerability can lead to significant confidentiality breaches.
• VI:H (High Integrity Impact): The vulnerability can lead to significant integrity breaches.
• VA:H (High Availability Impact): The vulnerability can lead to significant availability breaches.
• SC:N (No Scope Change): The vulnerability does not change the security scope.
• SI:N (No Security Impact): The vulnerability does not affect the security requirements.
• SA:N (No Security Authority): The vulnerability does not affect the security authority.
• E:P (Proof of Concept Exists): A proof of concept exploit is available.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector is through the manipulation of the Cookie argument in HTTP requests. An attacker can send a specially crafted HTTP request to the hedwig.cgi file, causing a stack-based buffer overflow. This can lead to arbitrary code execution, allowing the attacker to gain control over the affected device.

Exploitation Methods:

• Remote Code Execution (RCE): By exploiting the buffer overflow, an attacker can execute arbitrary code on the device.
• Denial of Service (DoS): The attacker can crash the device, rendering it unavailable.
• Data Exfiltration: The attacker can extract sensitive information from the device.

3. Affected Systems and Software Versions

The vulnerability affects D-Link DIR-600 routers running firmware versions up to 2.15WWb02. It is important to note that these versions are no longer supported by the manufacturer, making them particularly vulnerable to such attacks.

4. Recommended Mitigation Strategies

Given that the affected firmware versions are no longer supported, the following mitigation strategies are recommended:

• Upgrade to Supported Versions: If possible, upgrade to a newer, supported model of the D-Link router.
• Network Segmentation: Isolate the affected devices on a separate network segment to limit potential damage.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the router's management interface.
• Regular Monitoring: Continuously monitor network traffic for suspicious activities.
• Disable Unnecessary Services: Disable any unnecessary services or features on the router to reduce the attack surface.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals still using the affected D-Link DIR-600 routers. The potential for remote exploitation and the availability of a proof-of-concept exploit increase the likelihood of widespread attacks. Organizations should prioritize identifying and mitigating this vulnerability to prevent potential breaches and data loss.

6. Technical Details for Security Professionals

Vulnerability Details:

• Component: HTTP Header Handler
• File: hedwig.cgi
• Argument: Cookie
• Type: Stack-based buffer overflow

Exploit Availability:

• A proof-of-concept exploit is publicly available, increasing the risk of exploitation.

References:

• VulDB Entry
• CTI Entry
• GitHub PoC
• NVD Entry

Additional Notes:

• The vulnerability is identified by CVE-2025-15194.
• The assigner of the vulnerability is VulDB.
• ENISA IDs for the product and vendor are provided for reference.

Conclusion

The vulnerability EUVD-2025-205599 in D-Link DIR-600 routers is critical and poses a significant risk to organizations and individuals. Immediate action is required to mitigate the risk, including upgrading to supported versions, implementing network segmentation, and continuously monitoring network traffic. Security professionals should prioritize addressing this vulnerability to protect against potential attacks.