Tenda AC1206 setSchedWifi function sched_end_time buffer overflow vulnerability

The AC1206 is a high-performance router designed with gigabit ports on both WAN and LAN ports. tenda AC1206 firmware version US_AC1206V1.0RTL_V15.03.06.23_multi_TD01 is vulnerable to a buffer overflow vulnerability that originates in the /bin/httpd file /goform/. The sched_end_time parameter of the setSchedWifi function in openSchedWifi lacks length validation for the input data, which can be exploited by attackers to cause a denial of service.