Okay, research paid for with my tax dollars. Where can I download it?
You can't. The title should have read "MIT Publishes Paper Discussing Alleged Integer Overflow Debugger That You'll Never Be Able to Get Your Hands On".
(Incidentally, this isn't the first paper on a tool like this. None of the tools have ever been released for general use, although you can occasionally find buggy, research-prototype level code somewhere. I played with one a year or two ago, after several hours of rewriting their code to try and get it working on something other than the one specific configuration of some old Linux distro they tried it with I gave up).