
Aegis warship, meet Sunburn, Sunburn meet Aegis
North Korea presently has sufficient resources to knock out both an ABL and an Aegis platform stationed of its coast. While its own antiship missiles are rather lame, all it will take will be couple of Sunburns smuggled from someone else who has them to deal with ships (and using the homemade as decoys). Similarly, it may not have a particularly good airforce, but it has a lot of it so getting a couple of surviving fighters in-range to fire an AA missile for a successful strike against an ABL platform is also within its capabilities.
So if it decides to launch a missile it bloody well can *(though it does not really need to, plenty of container traffic around the world to smuggle it where it has to go).
Now it is too late (thanks to our dear pakistani friends and their "sharing" of technology).
In any case all this tech is dead on arrival. I find it extremely depressing, but having an orbital defence network looks like the only viable choice in the long term. We might as well surrender to the inevitable and start building one for the purposes of defence and retaliation. Oops, forgot, we are the only nation which voluntarily surrendered its ability to reach space. In that case might as well sit and wait until the NK container is shipped to somewhere in the greater metropolitan area. Not that we can do much more under the circumstances...