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• W3016206947 abstract "Memory-corruption attacks such as code-reuse attacks and data-only attacks have been a key threat to systems security. To counter these threats, researchers have proposed a variety of defenses, including control-flow integrity (CFI), code-pointer integrity (CPI), and code (re-)randomization. All of them, to be effective, require a security primitive—intra-process protection of confidentiality and/or integrity for sensitive data (such as CFI’s shadow stack and CPI’s safe region).In this paper, we propose SEIMI, a highly efficient intra-process memory isolation technique for memory-corruption defenses to protect their sensitive data. The core of SEIMI is to use the efficient Supervisor-mode Access Prevention (SMAP), a hardware feature that is originally used for preventing the kernel from accessing the user space, to achieve intra-process memory isolation. To leverage SMAP, SEIMI creatively executes the user code in the privileged mode. In addition to enabling the new design of the SMAP-based memory isolation, we further develop multiple new techniques to ensure secure escalation of user code, e.g., using the descriptor caches to capture the potential segment operations and configuring the Virtual Machine Control Structure (VMCS) to invalidate the execution result of the control registers related operations. Extensive experimental results show that SEIMI outperforms existing isolation mechanisms, including both the Memory Protection Keys (MPK) based scheme and the Memory Protection Extensions (MPX) based scheme, while providing secure memory isolation." @default.
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• W3016206947 date "2020-05-01" @default.
• W3016206947 modified "2023-09-30" @default.
• W3016206947 title "SEIMI: Efficient and Secure SMAP-Enabled Intra-process Memory Isolation" @default.
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• W3016206947 doi "https://doi.org/10.1109/sp40000.2020.00087" @default.
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