Tenda F453 Stack-Based Buffer Overflow Vulnerability in Parameters Handler

A stack-based buffer overflow vulnerability has been identified in the Tenda F453 router, specifically in version 1.0.0.3. The issue arises in the 'fromNatlimit' function within the '/goform/Natlimit' file, part of the Parameters Handler component. The vulnerability is triggered by manipulating the 'page' argument, which is processed by the 'sprintf' function without proper length validation, allowing for stack memory overflow. This vulnerability can be exploited remotely, and a public exploit is available.

Impact

Exploitation of this vulnerability leads to a stack-based buffer overflow, which can commonly result in arbitrary code execution or causing a denial-of-service condition.

Reproduction

The vulnerability can be reproduced by sending a POST request to the '/goform/Natlimit' endpoint. The request must include a 'page' parameter with a payload that exceeds the buffer's capacity, effectively overwriting stack memory. This can be done using a tool like Burp Suite or by crafting a similar HTTP request with the appropriate headers and payload.