first of all no need to found an exploit so simply just go to the tmp directory and then run non_null exploit for exemple wunderbar emporium yes it will give you a full root access but the problem is that u will not get any access to the bios unless ok i found a solution guys thanks for your help i just do this 1 exploit the kernel 2 change root password simply by using su and passwd "Os is debian" 3 install wine "windows programs emulation " 4 download a software that dump the bios "bios dumper version 1.3.6 you can found it on some chiness website " 5 load the dump to a debugger like idapro or a hexeditor " 6 found a the watchdog function on the bios and un,lock it by just chnage it into 0 7 download award bios flasher 8 flash the bios 9 ready to use thanks guys anyway cool forum nice comunity and have a nice day if anyone need something i will be very happy to help