This past weekend, I had some time to spare and decided to attempt some of the challenges from the BitSiege CTF. The CTF had some interesting challenges which I enjoyed solving and even managed to get first blood and only solve for one of the challenges. This blog post is a walkthrough of some of the challenges.
Catalog Kiwi Khaos Baby Canel Baby Canel 2 Diastema Invincible Baby’s First Format Binary Information Ghidra Exploit Kiwi Khaos This was a relatively simple web challenge, where I got first blood and ended up being the sole solver.
Recently I took part in the Africa Bug Pwn 2024 Capture the Flag Competition and managed to get second position with 2310 points. The CTF was very interesting and I got to learn a thing or two. This blog post will be a writeup of some of the challenges I managed to solve.
Binary Information Checking the file type of the binary, we can confirm that the file is a 64bit executable which is dynamically linked and the libc file is provided. We can also see that the binary has No Canary and No PIE. ./argv: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=1ec247dc11817e2e52f5e75b63701f24d11a936c, for GNU/Linux 3.2.0, not stripped From the checksec results:
Full RELRO is enabled, meaning we can’t overwrite got entries since most sections are marked as readable and not writable.
