Could hacker change data in one smart contract with out call contract function?

Question

Consider a Contract:

Contract Example{

    uint array[];

    address owner;

    function Example(){

        owner = msg.sender

    }

    function setArray(uint index, uint value) public {

        if (msg.sender == owner){

            array[index] = value;

        }

    }

}

Is there any possibility that hackers update array[] directly by generate a specific block. (steer clear of the condition that "only owner can update array")

Answer 1

No, nothing but the smart contract itself is allowed to modify its storage. This is assuming that the basic security of the blockchain is still intact