Talk for 2016 ISP course on Faculty of Computer and Information Science, Ljubljana.
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Address Space Layout Randomization (ASLR) is a computer security technique that provides protection from buffer overflow attacks. ASLR randomizes address space positions of key data of a process, thus making it difficult for an attacker to reliably jump to a particular exploited function in memory. In this paper we study limitations of ASLR and present viable exploitation options that can circumvent kernel space ASLR on current operating systems. We also discuss mitigation strategies against some of the attacks with their strengths and weaknesses revealed.