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feat: sheet7 a1 ef
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Leo
2026-06-12 11:31:14 +02:00
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Shellcodes are raw machine instructions executed directly by the CPU, so they must match the specific instruction set architecture.
To spawn a shell the shellcode has to make system calls to the kernel.
Because syscall numbers and the CPU registers used to pass arguments vary entirely between different operating systems and architectures, a shellcode written for 32-bit Linux will not work on 64-bit Linux or Windows.

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ASLR randomizes the base addresses of memory segments like the stack and shared libraries on every execution.
To defeat it an information leak vulnerability is usually required to read a valid memory address at runtime.
Since ASLR only shifts the memory regions as a whole, the relative offsets between functions remain constant.
By leaking a single pointer the base address can be calculated, which allows computing the exact runtime location of the target function or ROP gadgets.