Tenda i3 Stack-Based Buffer Overflow Vulnerability in Wi-Fi SSID Management

A stack-based buffer overflow vulnerability has been identified in the Tenda i3 router, specifically in version 1.0.0.6(2204). The issue arises in the 'formwrlSSIDget' function within the '/goform/wifiSSIDget' endpoint. The vulnerability can be exploited remotely by sending a crafted HTTP POST request with an overly long 'index' parameter, potentially leading to unauthorized memory manipulation.

Impact

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

Reproduction

The vulnerability can be reproduced by sending a POST request to the '/goform/wifiSSIDget' endpoint. The request must include a long 'index' parameter that exceeds the expected length, causing a buffer overflow in the application's memory stack.