Address space layout randomization and Shellcode

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Difference between Address space layout randomization and Shellcode

Address space layout randomization vs. Shellcode

Address space layout randomization (ASLR) is a computer security technique involved in preventing exploitation of memory corruption vulnerabilities. In hacking, a shellcode is a small piece of code used as the payload in the exploitation of a software vulnerability.

Buffer overflow

In programming and information security, a buffer overflow or buffer overrun is an anomaly whereby a program writes data to a buffer beyond the buffer's allocated memory, overwriting adjacent memory locations.

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Computer security

Computer security (also cybersecurity, digital security, or information technology (IT) security) is the protection of computer systems and networks from threats that may result in unauthorized information disclosure, theft of (or damage to) hardware, software, or data, as well as from the disruption or misdirection of the services they provide.

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Exploit (computer security)

An exploit (from the English verb to exploit, meaning "to use something to one’s own advantage") is a piece of software, a chunk of data, or a sequence of commands that takes advantage of a bug or vulnerability to cause unintended or unanticipated behavior to occur on computer software, hardware, or something electronic (usually computerized).

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Intrusion detection system

An intrusion detection system (IDS) is a device or software application that monitors a network or systems for malicious activity or policy violations.

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Library (computing)

In computer science, a library is a collection of read-only resources that is leveraged during software development to implement a computer program.

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NOP slide

In computer security, a NOP slide, NOP sled or NOP ramp is a sequence of NOP (no-operation) instructions meant to "slide" the CPU's instruction execution flow to its final, desired destination whenever the program branches to a memory address anywhere on the slide.

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Stack buffer overflow

In software, a stack buffer overflow or stack buffer overrun occurs when a program writes to a memory address on the program's call stack outside of the intended data structure, which is usually a fixed-length buffer.

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Vulnerability (computer security)

Vulnerabilities are flaws in a computer system that weaken the overall security of the system.

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