HTB Busines CTF 2021 Writeup
I solved 3 web challenges alone within 3 hours of starting the CTF. Was the Captain of our company team PwnWithClass, made up of members from Japan, Spain and France. Also worked on the last web challenge and the only misc challenge with a teammate.
HSCTF 2021 Writeup
I solved all web and the OSINT miscs with CTF.SG. Great easy-intermediate ctf overall, had fun with the high school members on our team.
Zh3r0 CTF 2021 Writeup
Only managed to jump in for 3 hours as I had to prepare and play in Japan Rapid Chess Grand Prix. I realised I haven't written a deserialization post so here's one! Only solved part of sparta and maniac's game. Took a look at some other webs but the source wasn't included so didn't try.
DCTF 2021 Writeup
Solved a couple of challenges and was leading in the first place until the admins decided to give out hints for the challenges we solved, while not giving hints for the challenges we did not. They also increased the points of some challenges manually, which happened to be the ones we didn't solve. There was also rampant flag/solution sharing in the official Discord.
CTFSG CTF 2021 Writeup
Wrote one simple challenge for our first CTF - here's the writeup!
TP-Link TL-WR841N Command Injection Exploit (CVE-2020-35576)
I was playing with my
pet home router, when I noticed that a parameter seemed to be executed by some form of system(). I tried to escape it and got my first CVE!