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 'fromexeCommand' function within the '/goform/exeCommand' file, where user-supplied input in the 'cmdinput' parameter is not properly validated before being copied to a buffer. This oversight allows for remote exploitation, potentially leading to unauthorized code execution or a denial-of-service condition.

Impact

Exploitation of this vulnerability allows for stack-based buffer overflow, which can be used to execute arbitrary code or cause a denial-of-service condition on the device.

Reproduction

The vulnerability can be reproduced by sending a POST request to the '/goform/exeCommand' endpoint. The request must include a 'cmdinput' parameter filled with a payload that exceeds the buffer's capacity, effectively overwriting the stack.