You are probably going to want to do this to make your initial exploit examples easier to work with and understand.
Turn off ASLR:
$ sudo echo 0 > /proc/sys/kernel/randomize_va_space
or
$ sudo sysctl -w kernel.randomize_va_space=0
Turn off NX (compile option to GCC)
-z execstack
Turn off stack smashing detection.
-fno-stack-protector
Turn off all other optimizations:
-O0
Unleash the Kraken
This post is a write-up for the pwn.hateful challenge in Nullcon Goa HackIM 2025 CTF. root@72f9eb9e3ebc:/chal/NULLCON/hateful# ./ld-linux-x86-64.so.2 --library-path . ./hateful My Boss is EVIL!!! I hate my Boss!!! These are things you really want to say to your Boss don't you? well
This post is a write-up for the pwn.hateful2 challenge in Nullcon Goa HackIM 2025 CTF. root@72f9eb9e3ebc:/chal/NULLCON/hateful2# ./ld-linux-x86-64.so.2 --library-path . ./hateful2 _______ _________ _______ _______ _ _______ |\ /|( ___ )\__ __/( ____ \( ____ \|\ /|( \ / ___ ) | ) ( || ( ) | ) ( | ( \/| ( \/| ) ( || ( \/ ) | | (___) || (___) | | | | (__ | (__ | | | || | / ) | ___ || ___ | | |
By Smallfoot Feb 1, 2025