Beetel 777VR1 Broadband Router Web Management Interface Hard-Coded Credentials Vulnerability

A vulnerability exists in the Beetel 777VR1 broadband router in versions through 01.00.09. The issue is located in the web management interface, which allows authentication using hard-coded default credentials. This vulnerability can be exploited by an attacker with local network access, and it has been publicly disclosed. The lack of a mandatory password change upon first login, combined with the acceptance of default credentials as valid, creates a significant security risk. The absence of rate limiting or account lockout mechanisms further exacerbates this issue, allowing for unlimited brute-force authentication attempts.

Impact

Exploitation of this vulnerability allows for full administrative control over the router, bypassing authentication requirements. It also enables unlimited brute-force attempts without detection, potentially leading to unauthorized access. Once exploited, an attacker can modify network settings, disrupt services, and use the router as a launch point for further attacks within the network.

Reproduction

To reproduce this vulnerability, access the router's web management interface and log in using the default credentials 'admin' for the username and 'password' for the password. After logging in, verify that no password change is required and that full administrative privileges are granted. This vulnerability can also be demonstrated by attempting to log in with incorrect credentials multiple times, which will show that the router does not implement any rate limiting or account lockout measures.

Remediation

It is recommended to remove hard-coded default credentials from the router's firmware, enforce a mandatory password change upon first login, and implement security measures such as rate limiting, authentication delays, or account lockout mechanisms. Additionally, the management interface should be restricted to trusted networks only.