Ostrich Lab - CTF Write Ups

Where we jmping - Meta CTF

2024-06-24

Author: Morgen Malinoski

Description

Quick, we need to pick a place to JMP to! Can your tremendous strategy get us the win?
Connect via nc kubenode.mctf.io 30006 and find out.

Notes

We are provided a binary and a container: kubenode.mctf.io:30006

It prompts for a memory address to jump to. Image

Running objdump -t where_we_jmping, we see a win function at 0x4011a6. Image

Plugging that into the binary worked: Image

I ran nc kubenode.mctf.io 3006, and plugged that address in, and it outputted the flag: Image

Flag: MetaCTF{jmp1ng_t0_th3_g00d_l00t}