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• W2564856904 abstract "Address Space Layout Randomization (ASLR) is a widely-used technique that protects systems against a range of attacks. ASLR works by randomizing the offset of key program segments in virtual memory, making it difficult for an attacker to derive the addresses of specific code objects and consequently redirect the control flow to this code. In this paper, we develop an attack to derive kernel and user-level ASLR offset using a side-channel attack on the branch target buffer (BTB). Our attack exploits the observation that an adversary can create BTB collisions between the branch instructions of the attacker process and either the user-level victim process or on the kernel executing on its behalf. These collisions, in turn, can impact the timing of the attacker's code, allowing the attacker to identify the locations of known branch instructions in the address space of the victim process or the kernel. We demonstrate that our attack can reliably recover kernel ASLR in about 60 milliseconds when performed on a real Haswell processor running a recent version of Linux. Finally, we describe several possible protection mechanisms, both in software and in hardware." @default.
• W2564856904 created "2017-01-06" @default.
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• W2564856904 date "2016-10-15" @default.
• W2564856904 modified "2023-09-26" @default.
• W2564856904 title "Jump over ASLR: attacking branch predictors to bypass ASLR" @default.
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• W2564856904 doi "https://doi.org/10.5555/3195638.3195686" @default.
• W2564856904 hasPublicationYear "2016" @default.
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