ECCploit is the first Rowhammer attack to defeat error-correcting code

Re:ECCploit is the first Rowhammer attack to defeat error-co... by mettamage on Thursday November 22, 2018 @01:41PM (#18511696)

Is it simple? From what I understand it is still not clear how Rowhammer is physically possible. If you don't know how it's possible, then current manufacturers may not know how to create good memory. We don't get everything in physics yet and it's affecting our ability to make good memory chips that are secure.

One possible explanation of how it is possible, the parasitic coupling effect: https://github.com/google/rowhammer-test/blob/master/docs/re...

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Re:ECCploit is the first Rowhammer attack to defeat error-co... by brennanpeterson on Thursday November 22, 2018 @02:44PM (#18512091)

It is entirely clear how and why it happens.

It is a trade-off of density and coupling: the closer you get, the higher the parasitics. But if you stay far apart, you have low density (expensive). You also likely need different caching, error correction, and refresh settings.

The concept of parasitic write induced loss is really old in memory. Happens in NAND flash too. It is perhaps surprising that attacks like rowhammer never happened before. Or maybe we never knew?

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