Hi lads, @leo_something here!

As I really enjoy CTFs competitions in this blog I’ll share CTF related stuff, mainly writeups, if I ever find the willpower to write them. I usually tackle binary exploitation challenges, so yes.. only low level stuff here.

socket(0,2,0) - Reviving modprobe_path again

Finding a new modprobe trigger without AI to solve “greynote” at GreyCTF Finals

kpwn

Lake Quals 2025 - Still Not Malloc

Some satisfying heap feng shui at 5 am in Nanjing

heap custom allocator

Seccon Quals 2025 - CursedST

Pop on an empty std::stack?!

heap c++

Seccon Quals 2025 - unserialize

Warmup challenge featuring a “number conversion base confusion”.

bof

Mimic 2025 - Cherry

Exploiting jerryscript in China

browser

HTB Cyber Apocalypse 2025 - Vault

Hardest pwn challenge of the CTF. A simple vulnerability lead to a BOF, but the path to RCE was really interesting

bof