Tenda F451 Stack-Based Buffer Overflow Vulnerability in WrlclientSet Function

A stack-based buffer overflow vulnerability has been identified in the Tenda F451 router, specifically in version 1.0.0.7. The issue arises in the WrlclientSet function within the httpd component, where the user-provided parameter 'GO' is processed without proper length validation. This oversight allows for a buffer overflow, which can be exploited remotely, potentially leading to a denial-of-service condition or arbitrary code execution.

Impact

Exploitation of this vulnerability causes a stack-based buffer overflow, which can disrupt normal operation or allow for the execution of malicious code.

Reproduction

The vulnerability can be reproduced by sending a POST request to the '/goform/WrlclientSet' endpoint with a 'GO' parameter that is excessively long. This can be done using a script or tool that automates the process of sending HTTP requests, such as Python with the Requests library.