UTT Aggressive 520W Buffer Overflow Vulnerability in formConfigFastDirectionW

A buffer overflow vulnerability has been identified in the UTT Aggressive 520W router, specifically in the firmware version 1.7.7-180627. The issue arises in the '/goform/formConfigFastDirectionW' endpoint, where the 'strcpy' function is used to copy the 'ssid' parameter into a buffer without proper boundary checks. This vulnerability can be exploited remotely, potentially leading to a denial-of-service condition.

Impact

Exploitation of this vulnerability causes a buffer overflow, which can be used to execute arbitrary code or cause a denial-of-service condition by crashing the device.

Reproduction

The vulnerability can be reproduced by sending a POST request to the '/goform/formConfigFastDirectionW' endpoint. The request must include a 'wrlessMode' parameter set to 4 and a 'ssid' parameter containing a payload that exceeds the buffer size, causing the overflow.