D-Link NAS Remote Code Execution Scanner

D-Link NAS devices are popular network-attached storage solutions used by individuals and businesses to store and share data across networks. These devices are typically used in home and small office environments, allowing users to access files remotely and securely. D-Link NAS systems offer various functionalities, including file sharing, backup solutions, and media streaming. They are equipped with interfaces that facilitate easy management and configuration. Due to their widespread use and critical role in data management, maintaining the security of these devices is paramount. Ensuring the NAS operates with the latest patches and configurations helps prevent unauthorized access and potential data breaches.

The D-Link NAS Remote Code Execution vulnerability arises when the NAS interface's `sc_mgr.cgi` does not adequately restrict command execution. This vulnerability allows attackers to execute arbitrary commands, potentially leading to unauthorized control of the device. Such vulnerabilities are critical as they compromise device integrity and user data. This specific flaw can be exploited remotely by unauthorized users, facilitating the compromise of the affected NAS device. It showcases the importance of adhering to secure coding practices, particularly in interfaces accessible over the network. Without proper mitigation, this vulnerability could pose significant risks to D-Link NAS users.

Technical details of this vulnerability involve the `sc_mgr.cgi` script within the D-Link NAS interface. The vulnerability is triggered when an unauthenticated attacker crafts requests that are improperly sanitized, allowing command injection. The vulnerability resides in the way input parameters are handled, specifically in commands such as `SC_Get_Info`. Attackers can exploit this via web requests by misusing cookies and injecting command sequences. Successful exploitation results in unauthorized command execution with the privileges of the web server process. This flaw significantly increases the risk of device compromise and unauthorized access to sensitive user data.

If malicious actors exploit this Remote Code Execution vulnerability, they could gain full control over the affected D-Link NAS devices. This could result in unauthorized access to sensitive data stored within the NAS, data corruption, or even service disruption. Furthermore, compromised devices could be used as launchpads for further attacks within a network. In severe cases, attackers could leverage their access to deploy malware or exfiltrate sensitive information. It underlines the critical need for vigilant security measures and rapid patching of vulnerable systems to protect against potential exploitation.