US intelligence agencies pay hackers as much as £160,000 for iOS security exploits or £126,000 for a Chrome or Explorer vulnerability. The agencies will not tell you about it, they would use that exploit to gain access to devices.
You had better hope the gent who discovered this Windows Phone security exploit is the only one who knows how to do it: this video shows just how easy it is to permanently ruin a WP7 handset.
ASLR is something very technical to do with computers and randomising how they use their memory. Google's sticking it in the Android "Ice Cream Sandwich" update, to ensure better security.