Tenda F456 Stack-Based Buffer Overflow Vulnerability

A stack-based buffer overflow vulnerability has been identified in the Tenda F456 router, specifically in version 1.0.0.5. The issue arises in the 'fromqossetting' function within the '/goform/qossetting' file. The vulnerability is triggered by manipulating the 'page' argument, which is passed to the 'sprintf' function without proper length validation, leading to a buffer overflow. This vulnerability can be exploited remotely, and there is a public proof-of-concept available.

Impact

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

Reproduction

The vulnerability can be reproduced by sending a POST request to '/goform/qossetting' with a 'page' parameter that contains a payload designed to overflow the stack buffer. The request should include appropriate headers to mimic a legitimate XMLHttpRequest.