RustDesk Web Client Default Login Scanner

The RustDesk Web Client is a component of the RustDesk remote desktop software, used for accessing and managing remote systems through a web interface. It is widely employed by IT professionals, remote support technicians, and system administrators to facilitate remote computer management and support. The software allows users to perform tasks such as remote desktop control, file transfers, and system monitoring from a web browser, enhancing flexibility in remote work environments. RustDesk is known for its ease of setup and user-friendly interface, making it a popular choice for remote access solutions in both small businesses and larger enterprises. The product supports various platforms, including Windows, macOS, and Linux, ensuring cross-platform compatibility for diverse user needs. Typically, organizations use the RustDesk Web Client to streamline their remote operations and provide seamless support to clients and colleagues.

The detection aspect of this scanner focuses on identifying the presence of default login credentials in the RustDesk Web Client. Default credentials pose a significant security risk, as they can be exploited by unauthorized users to gain access to restricted system functionalities. By scanning for default logins, this tool helps identify systems that have not been properly configured or secured, allowing administrators to take corrective action. It emphasizes the importance of changing default login credentials to strengthen the security posture of the systems using RustDesk Web Client. Detecting default logins is crucial in preventing unauthorized access and maintaining the integrity of the remote support infrastructure. The scanner operates by sending specific payloads to test for successful logins with known default usernames and passwords, ensuring thorough detection of such vulnerabilities.

The technical operation of the scanner involves sending HTTP POST requests to the RustDesk Web Client's API endpoint responsible for admin login. It targets the endpoint likely located at /api/admin/login, using a JSON payload with typical default credentials such as "admin" for the username and "test1234" for the password. The response from the server is analyzed to determine if access is granted, with success indicated by specific response codes and tokens within the JSON body. The scanner carefully checks for HTTP status codes, content type, and expected JSON keys and values to confirm the presence of a default login vulnerability. It employs a pitchfork attack method, iterating through likely username and password combinations. This detection technique helps quickly identify misconfigured systems that have retained default credentials.

If the default login vulnerability in RustDesk Web Client is exploited, it can lead to unauthorized access to the admin console, compromising the overall security of the remote access setup. Malicious actors gaining access through default credentials can perform actions such as modifying system settings, accessing sensitive information, and deploying malicious software. This kind of breach can disrupt operations, lead to data theft, and potentially provide a foothold for further attacks on the network. Additionally, the misuse of admin credentials might enable attackers to create or modify user accounts, allowing persistent access. The exploitation of this vulnerability can result in financial loss, reputational damage, and increased risk of compliance violations for the affected organization.

REFERENCES

• https://rustdesk.com/docs/en/self-host/rustdesk-server-pro/console/
• https://github.com/rustdesk/rustdesk-server-pro