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Jonas Vinck, Bert Abrath, Bart Coppens, Alexios Voulimeneas, Bjorn De Sutter, Stijn Volckaert · 2022
Multi-Variant Execution Environments (MVEEs) are a powerful tool for protecting legacy software against memory corruption attacks. MVEEs employ software diversity to run multiple variants of the same program in lockstep, whilst providing them with the same inputs and comparing their behavior. Well-constructed variants will behave equivalently under normal operating conditions but diverge when under attack. The MVEE detects these divergences and takes action before compromised variants can damage the host system.