Tenda CH22 Stack-Based Buffer Overflow Vulnerability in WrlExtraSet Function

A stack-based buffer overflow vulnerability has been identified in the Tenda CH22 router, specifically in version 1.0.0.1. The issue arises in the WrlExtraSet function within the file /goform/WrlExtraSet. The vulnerability can be exploited remotely by manipulating the GO parameter, leading to potential denial-of-service conditions 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 the /goform/WrlExtraSet endpoint. The request must include a GO parameter filled with a payload that exceeds the buffer's capacity, effectively overwriting adjacent memory on the stack.