Default [Q] Got Bootloop after build.prop permission changed! HELP!

I manually change the build.prop permission and I forget to back to normal permission rw-r-r-
And my unit got bootloop.

How do I gonna fix this?

Do I need to reflash 4.3 update or can I directly flash to 4.4?
Help me pls

SGS Note 2 N7100 4.3