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 issue arises within the HTTP POST request handler, in the file '/boafrm/formSaveConfig'. The vulnerability is triggered by manipulating the 'submit-url' argument, which leads to a buffer overflow. This flaw can be exploited remotely, potentially causing a denial-of-service condition.

Impact

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

Reproduction

To reproduce this vulnerability, send a malicious HTTP POST request to the '/boafrm/formSaveConfig' endpoint, including a crafted 'submit-url' argument that exploits the buffer overflow.