so the horror story here appears to be that from a javscript application i could get a blind write to any location on the system. this is powerful but undirect

so the horror story here appears to be that from a javscript application i could get a blind write to any location on the system. this is powerful but undirected. locations of important code have been randomized in your operating system for quite some time. if this technique even works, to turn it into an 'exploit' you would need to know the location of the code that you want to patch, and knowing this requires yet another exploit...