“Maybe from a cargo vessel in the Gulf, but really doubtful they could launch from Norkland and reach that far.”
http://www.guardian.co.uk/world/2012/dec/13/north-korea-satellite-rocket-launch
While they can put a small payload up and have intercontinental capability, it doesn't look like they have a physics package small enough to send the distance.
I have no doubt they are working on that.
One thing is certain: it isn't wise to underestimate a madman, he might be as capable as he says.