Tenda FH451 Stack-Based Buffer Overflow Vulnerability

A stack-based buffer overflow vulnerability has been identified in the Tenda FH451 router, specifically in version 1.0.0.9. The issue arises in the 'formWrlExtraSet' function within the '/goform/WrlExtraSet' file. The vulnerability is triggered by manipulating the 'GO' parameter, which is not properly validated before being passed to a function, leading to the overflow. This flaw can be exploited remotely, potentially allowing for denial-of-service attacks or arbitrary code execution.

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/WrlExtraSet' with a 'GO' parameter that contains a payload designed to overflow the stack buffer. The request should include headers that mimic a typical browser request, such as 'User-Agent' and 'Accept-Language'.