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Researchers Suggest Software Mitigations For Rowhammer Attacks

Researchers Suggest Software Mitigations For Rowhammer Attacks (Innovation and Research)

Rowhammer attacks are possible due to increasing DRAM density, which has led to memory cells being physically smaller and closer together. Rowhammer attacks are not easy to mitigate, particularly using software. The most efficient mitigation involves redesigning DRAM modules. However, researchers from the Technische Universität Darmstadt and the University of Duisburg-Essen in Germany have now come up with what they call “practical and generic software-only defenses.” The first method, dubbed B-CATT, doesn’t require any changes to the OS and it can be used on all x86 systems. The second mitigation, G-CATT (Generic-CATT), aims to prevent bit flips from affecting memory locations belonging to high-privileged security domains, such as the kernel and co-located virtual machines.

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