TOTOLINK EX1200T Buffer Overflow Vulnerability in HTTP POST Request Handler

A critical buffer overflow vulnerability has been identified in the TOTOLINK EX1200T router, specifically in the firmware version 4.1.2cu.5232_B20210713. The vulnerability arises in the HTTP POST request handler, within the file '/boafrm/formSysCmd'. The issue is triggered by manipulating the 'submit-url' argument, leading to a buffer overflow that can be exploited remotely.

Impact

Exploitation of this vulnerability causes a buffer overflow, which can commonly lead to arbitrary code execution or a denial-of-service condition.

Reproduction

The vulnerability can be reproduced by sending a malicious HTTP POST request to the '/boafrm/formSysCmd' endpoint, including a crafted 'submit-url' argument that exploits the buffer overflow condition.