CVE-2025-45784

Comprehensive Technical Analysis of CVE-2025-45784

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-45784 CVSS Score: 9.8

The vulnerability in question pertains to the D-Link DPH-400S/SE VoIP Phone v1.01, which contains hardcoded provisioning variables, including sensitive credentials such as PROVIS_USER_PASSWORD. This vulnerability arises from the insecure storage of sensitive information within the firmware binary, making it accessible to attackers who can extract these credentials using static analysis tools.

Severity Evaluation:

• CVSS Score: 9.8 (Critical)
• Impact: High
• Exploitability: High

The high CVSS score indicates a critical vulnerability that can lead to unauthorized access to device functions or user accounts, posing significant risks to the confidentiality, integrity, and availability of the affected systems.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Firmware Extraction: An attacker with access to the firmware image can use static analysis tools like strings or xxd to extract hardcoded credentials.
2. Network Access: If the attacker gains network access to the device, they can potentially exploit the extracted credentials to gain unauthorized access to device functions or user accounts.
3. Supply Chain Attack: An attacker could intercept and modify the firmware during the supply chain process to embed malicious code or extract sensitive information.

Exploitation Methods:

1. Static Analysis: Using tools like strings or xxd to analyze the firmware binary and extract hardcoded credentials.
2. Reverse Engineering: Decompiling the firmware to understand its structure and locate sensitive information.
3. Network Scanning: Identifying vulnerable devices on the network and attempting to exploit the extracted credentials.

3. Affected Systems and Software Versions

Affected Systems:

• D-Link DPH-400S/SE VoIP Phone

Affected Software Versions:

• Firmware version v1.01

It is crucial to note that other versions of the firmware may also be affected if they share the same codebase or have similar vulnerabilities.

4. Recommended Mitigation Strategies

1. Firmware Update: Immediately update the firmware to a version that addresses this vulnerability. D-Link should release a patched version that removes hardcoded credentials and implements secure storage mechanisms.
2. Network Segmentation: Isolate VoIP devices on a separate network segment to limit the potential impact of an attack.
3. Access Control: Implement strict access controls to limit who can access and modify the firmware.
4. Monitoring and Logging: Enable comprehensive monitoring and logging to detect any unauthorized access attempts or suspicious activities.
5. Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues proactively.

5. Impact on Cybersecurity Landscape

The discovery of this vulnerability highlights the ongoing challenge of securing IoT and VoIP devices, which are often deployed in critical environments such as enterprises and healthcare facilities. The presence of hardcoded credentials underscores the need for better security practices in firmware development and the importance of regular updates and patches.

This vulnerability also emphasizes the need for robust supply chain security measures to prevent tampering and ensure the integrity of firmware and software updates.

6. Technical Details for Security Professionals

Vulnerability Details:

• Hardcoded Credentials: The firmware contains hardcoded provisioning variables, including PROVIS_USER_PASSWORD, which are stored in plaintext.
• Extraction Methods: Tools like strings and xxd can be used to extract these credentials from the firmware binary.
• Firmware Analysis: Static analysis techniques can reveal the presence of sensitive information within the firmware.

Mitigation Steps:

1. Secure Storage: Implement secure storage mechanisms for sensitive information, such as encryption and secure key management.
2. Code Review: Conduct thorough code reviews to identify and remove hardcoded credentials and other sensitive information.
3. Firmware Integrity: Ensure the integrity of firmware updates through digital signatures and secure distribution channels.
4. Incident Response: Develop and implement an incident response plan to quickly address and mitigate any potential exploitation of this vulnerability.

References:

• Cybermaya Advisory
• D-Link Security Bulletin

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of unauthorized access and potential data breaches.