Eurolab ELTS100_UBX Broken Access Control Vulnerability

A broken access control vulnerability has been identified in the Eurolab ELTS100_UBX device, specifically in firmware version ELTS100v1.UBX. The vulnerability arises from missing authentication on critical administrative endpoints, allowing attackers to directly access and modify sensitive system and network configurations, upload firmware, and execute unauthorized actions. This lack of authentication enables remote attackers to fully compromise the device, disrupt its operation, and control its functionality.

Impact

Exploitation of this vulnerability allows unauthenticated attackers to gain administrative access, modify device settings including network configurations, upload malicious firmware, and take full control of the device.

Reproduction

The vulnerability can be reproduced by sending unauthenticated HTTP requests to the vulnerable administrative endpoints. This can be done manually using tools like curl or automated with a Python script that performs the same actions. The endpoints can be accessed without any form of authentication, and the device will respond to the requests, allowing attackers to exploit the vulnerability by accessing cryptographic keys, modifying system and network settings, and uploading firmware.

Remediation

To address this vulnerability, it is recommended to implement mandatory authentication for all sensitive endpoints, restrict access to administrative endpoints based on trusted IP addresses, and enforce role-based access control. Additionally, all inputs should be validated, firmware updates should require cryptographic signature verification, and secure session management practices should be applied. Until a patch is available, administrators can use firewall rules to restrict access to sensitive endpoints, monitor network traffic for suspicious activity, disable firmware update access from untrusted sources, and require a VPN or secure tunnel for remote administrative access.