README.md

basics-of-pwn

My course work about basic binary exploitation.

Table of Contents

• Memory layout of the process
• ELF and its key things
  • ELF format
  • Features of ELF
• Vulnerabilities types
  • Buffer overflow
    • Structure within the stack
    • Exploitation
    • Vulnerable code
  • Stack overflow
    • Jump to an arbitrary address
    • Shellcode writing
    • Exploitation
    • NOP chain
    • pwntools
  • Format string vulnerability
    • View vulnerability
    • Format string specifiers
    • Read arbitrary data
    • Jump to an arbitrary address
    • Writing in several stages
    • Exploitation
    • What else can you overwrite with a format string
  • [Heap overflow]
• Security techniques
  • Non-Executable Stack(NX)
  • Address Space Layout Randomization(ASLR)
  • Stack Canary
  • Position Independent Executable(PIE)
  • Relocation Read-Only(RELRO)
  • [All five in the action]
• Bypass security techniques
  • Return-to-libc(ret2libc)
  • Return-oriented programming(ROP)

Resources

Links

• elf wiki
• elf pdf book
• x86 syscalls table
• x86-64 syscalls talbe
• gef docs
• gef repo
• gdb - unset environement
• pwntools docs
• pwntools repo
• stanford format-string pdf
• shellcode database
• stack canary
• collection of ctf binary exploitation solutions

Books

• The Shellcoder's Handbook: Discovering and Exploiting Security Holes, 2nd Edition