Tenda i3 Stack-Based Buffer Overflow Vulnerability in formwrlSSIDset Function

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 formwrlSSIDset function within the /goform/wifiSSIDset file. Remote exploitation is possible by manipulating the index or GO parameters, leading to potential unauthorized memory access and code execution.

Impact

Exploitation of this vulnerability causes a stack-based buffer overflow, which can lead to arbitrary code execution on the device.

Reproduction

The vulnerability can be reproduced by sending an HTTP POST request to the /goform/wifiSSIDset endpoint. The request must include an excessively long string in the index or GO parameter. This can be done using a web browser or a tool like curl, by specifying the appropriate headers and cookie information.