~/CSC 472/Class 04

CSC 472 · Class 04

Shellcode

18 knowledge points. Work through them in order, or jump to any topic.

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Knowledge Points

01What Is Shellcode? → 02Why We Study It (Defender's Lens) → 03Constraint 1: Position Independence → 04Constraint 2: Bad Bytes (Null-Free) → 05Avoiding Null Bytes: A Small Example → 06The Goal: execve("/bin/sh", NULL, NULL) → 07Conceptual execve Shellcode (x86-64) → 08Reading the Example → 09Option A: pwntools shellcraft + asm → 10Option B: msfvenom; Option C: Write Your Own → 11Where Shellcode Lives and How It Runs → 12The Hard Requirement: An Executable Region → 13NX / DEP and checksec → 14W^{ → 15Bad-Character Analysis and Encoding (Concept) → 16Detection and Defense Perspective → 17Tie-In: Lab 2 (Return-to-Shellcode Bonus) → 18Summary →