samsung I9300 error!!! Not supported android version 4.1.2

[Ruba]

Searching Samsung modem... detected COM167
Reading phone info...
Software version: I9300XXELL4/I9300NELK2/I9300H3GELL1
IMEI: 353721051851065
Product code: GT-I9300MBDH3G

Reading phone info...
Model: GT-I9300
Android version: 4.1.2
Product code: GT-I9300MBDH3G
Phone version: I9300NELK2
PDA version: I9300XXELL4
CSC version: I9300H3GELL1
IMEI: Unknown
Checking Super user right... false
Rooting phone, please wait... error
Not supported android version 4.1.2