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Mitigations
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Exploiting the DRAM Rowhammer Bug to Gain Kernel Privileges
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- 1 Bit flips!
- 2 The rowhammer DRAM bug
- 3 Overview of talk
- 4 About the speakers
- 5 Exploiting random bit flips
- 6 Types of memory error
- 7 DRAM row buffer
- 8 DRAM refresh
- 9 "Hammering" can cause bit flips
- 10 Bad cells
- 11 Step 1: Bypass the cache
- 12 Double-sided hammering
- 13 Flippy the Laptop
- 14 Intro to Native Client (NaCl)
- 15 Escaping an in-process sandbox
- 16 Bit flips make safe code unsafe
- 17 Using physical memory access
- 18 Page reuse
- 19 Mitigations
- 20 Mitigation: ECC memory
- 21 "Ideal" fix: Target Row Refresh, TRR
- 22 Mitigation: 2x refresh rate
- 23 Conclusions
- 24 For more information
