Belkin F9K1015 Buffer Overflow Vulnerability in PPPoE Setup

A buffer overflow vulnerability has been identified in the Belkin F9K1015 router, specifically in version 1.00.10. The issue arises in the '/goform/formPPPoESetup' endpoint, where the 'pppUserName' parameter is processed without proper length validation. This oversight allows for remote exploitation by overwowing a stack-based buffer, potentially leading to arbitrary code execution.

Impact

Exploitation of this vulnerability causes a stack-based buffer overflow, which can commonly lead to arbitrary code execution.

Reproduction

The vulnerability can be reproduced by sending a POST request to '/goform/formPPPoESetup' with a 'pppUserName' parameter that exceeds the buffer's capacity. The request should be made without any length checks, allowing the excess data to overflow into adjacent memory.