README.md

OS and File security

Let's run checksec on the binary we have.

  $> checksec --file level4
  RELRO           STACK CANARY      NX            PIE             RPATH      RUNPATH      FILE
  No RELRO        No canary found   NX disabled   No PIE          No RPATH   No RUNPATH   level4

Same security as previous level.

GDB analysis

Useful data on the binary itself.

Binary compilation

Use this command to compile source.c, reproduction source-code of the given binary.

  $> gcc -Wl,-z,norelro -fno-stack-protector -z execstack -o level4 source.c