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posted by
Fnord666
on Sunday June 23 2019, @04:26AM
from the next-up-is-bottom-channel-attacks dept.
from the next-up-is-bottom-channel-attacks dept.
Submitted via IRC for Bytram
SSH gets protection against side channel attacks
Damien Miller (djm@) has just committed a new feature for SSH that should help protect against all the various memory side channel attacks that have surfaced recently.
Add protection for private keys at rest in RAM against speculation and memory sidechannel attacks like Spectre, Meltdown, Rowhammer and Rambleed. This change encrypts private keys when they are not in use with a symmetic key that is derived from a relatively large "prekey" consisting of random data (currently 16KB).
[...] Many thanks to Damien and all the others involved for working on this improvement!
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SSH Gets Protection Against Side Channel Attacks
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(Score: 1, Interesting) by Anonymous Coward on Sunday June 23 2019, @12:14PM
PS - being able to hang a process one way or another, or more easily, to keep the need for the key in RAM, doesn't require full access either. Eg. maybe I send you a million cert decrypt requests, so that the value is in RAM more than it's not, because the CPU is starved while using the value for decryptions and it can't yet flush the operators.