CVE-2025-55637

Comprehensive Technical Analysis of CVE-2025-55637

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-55637

Description: The Reolink Smart 2K+ Plug-in Wi-Fi Video Doorbell with Chime, running firmware version v3.0.0.4662_2503122283, contains a command injection vulnerability within the setddns_pip_system() function. This vulnerability allows an attacker to execute arbitrary commands on the device, potentially leading to full system compromise.

CVSS Score: 9.8

Severity Evaluation:

• Critical: A CVSS score of 9.8 indicates a highly critical vulnerability. The high score is due to the potential for complete system compromise, the ease of exploitation, and the significant impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attack: An attacker could exploit this vulnerability over the network by sending specially crafted packets to the device.
• Local Exploitation: If an attacker has physical access to the device or can manipulate the local network, they could exploit the vulnerability to gain control.

Exploitation Methods:

• Command Injection: The attacker can inject malicious commands through the setddns_pip_system() function, which processes DDNS (Dynamic Domain Name System) settings. By crafting a malicious input, the attacker can execute arbitrary commands on the device.
• Remote Code Execution (RCE): The command injection can lead to RCE, allowing the attacker to run any code on the device, including installing malware, exfiltrating data, or disrupting services.

3. Affected Systems and Software Versions

Affected Systems:

• Reolink Smart 2K+ Plug-in Wi-Fi Video Doorbell with Chime

Affected Software Versions:

• Firmware version v3.0.0.4662_2503122283

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Apply the latest firmware update provided by Reolink to patch the vulnerability.
• Network Segmentation: Isolate the affected devices on a separate network segment to limit potential attack vectors.
• Firewall Rules: Implement strict firewall rules to restrict access to the device, allowing only necessary traffic.

Long-Term Strategies:

• Regular Patch Management: Establish a regular patch management process to ensure all devices are updated promptly.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity and potential exploitation attempts.
• User Education: Educate users on the importance of securing IoT devices and the risks associated with unpatched vulnerabilities.

5. Impact on Cybersecurity Landscape

Broader Implications:

• IoT Security: This vulnerability highlights the ongoing challenges in securing IoT devices, which are often deployed in large numbers and can be difficult to manage and update.
• Supply Chain Risks: The incident underscores the importance of supply chain security, as vulnerabilities in third-party devices can have significant downstream effects.
• Consumer Trust: Such vulnerabilities can erode consumer trust in smart home devices, emphasizing the need for robust security measures and transparent communication from manufacturers.

6. Technical Details for Security Professionals

Technical Description:

• Vulnerable Function: The setddns_pip_system() function is responsible for handling DDNS settings. The function does not properly sanitize user input, allowing for command injection.
• Exploit Details: An attacker can craft a malicious DDNS username or password that includes command injection payloads. When the function processes this input, it executes the injected commands with the privileges of the device.

References:

• CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
• Reolink Camera Command Injection Exploit

Conclusion: CVE-2025-55637 represents a critical vulnerability in the Reolink Smart 2K+ Plug-in Wi-Fi Video Doorbell with Chime. The command injection flaw in the setddns_pip_system() function can be exploited to execute arbitrary commands, leading to full system compromise. Immediate mitigation strategies include updating the firmware, implementing network segmentation, and deploying intrusion detection systems. Long-term, organizations should focus on robust patch management and user education to mitigate similar risks in the future. This vulnerability underscores the broader challenges in securing IoT devices and the importance of supply chain security.