CVE-2025-5630

Comprehensive Technical Analysis of CVE-2025-5630

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-5630 CVSS Score: 9.8

The vulnerability in question is a stack-based buffer overflow affecting the D-Link DIR-816 router, specifically in the file /goform/form2lansetup.cgi. This vulnerability is classified as critical due to its high CVSS score of 9.8. The severity is attributed to the potential for remote exploitation, which can lead to arbitrary code execution, system crashes, or unauthorized access to sensitive information.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: The vulnerability can be exploited remotely, meaning an attacker does not need physical access to the device.
• Network-Based Attacks: Given that the affected component is related to LAN setup, attackers can potentially exploit this vulnerability over the network.

Exploitation Methods:

• Buffer Overflow: By manipulating the ip argument in the /goform/form2lansetup.cgi file, an attacker can cause a stack-based buffer overflow. This can lead to the execution of malicious code or the disruption of normal device operations.
• Public Exploit Availability: The exploit has been disclosed to the public, increasing the likelihood of widespread attacks.

3. Affected Systems and Software Versions

Affected Systems:

• D-Link DIR-816 router

Software Versions:

• Firmware version 1.10CNB05

Note: This vulnerability only affects products that are no longer supported by the maintainer, which means that no patches or updates will be provided by D-Link.

4. Recommended Mitigation Strategies

Immediate Actions:

• Network Segmentation: Isolate the affected devices from critical networks to limit the potential impact of an attack.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the device's management interface.
• Monitoring: Increase monitoring of network traffic to detect any suspicious activities targeting the vulnerable component.

Long-Term Solutions:

• Upgrade Devices: Replace the affected devices with supported models that receive regular security updates.
• Patch Management: Ensure that all network devices are regularly updated with the latest firmware and security patches.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and respond to potential exploitation attempts.

5. Impact on Cybersecurity Landscape

The disclosure of this vulnerability highlights the risks associated with using unsupported hardware. Organizations and individuals relying on outdated devices are at a higher risk of being targeted by cybercriminals. This incident underscores the importance of regular hardware and software updates, as well as the need for robust vulnerability management practices.

6. Technical Details for Security Professionals

Vulnerability Details:

• Component: /goform/form2lansetup.cgi
• Vulnerable Argument: ip
• Type of Vulnerability: Stack-based buffer overflow

Exploitation Steps:

1. Identify Target: Locate the D-Link DIR-816 router with firmware version 1.10CNB05.
2. Craft Malicious Input: Create a payload that manipulates the ip argument to trigger the buffer overflow.
3. Deliver Payload: Send the crafted input to the vulnerable component via a network request.
4. Execute Code: If successful, the payload will execute arbitrary code on the device, potentially leading to full system compromise.

References:

• GitHub Repository
• VulDB Entry
• D-Link Official Website

Conclusion: CVE-2025-5630 represents a significant risk to organizations and individuals using the affected D-Link DIR-816 router. Immediate mitigation strategies should be implemented to protect against potential exploitation. Long-term, it is advisable to replace unsupported devices with those that receive regular security updates to maintain a robust cybersecurity posture.