pwnable.kr
SSH into a server and exploit programs to read the flag
pwnable.kr is a wargame of binary exploitation challenges. For each one you connect to a server over SSH, find a program, its source code and a flag file you cannot read, and then exploit the program to get the flag.
Free · No login · SSH · Intermediate
About pwnable.kr
It trains reading C code, using a debugger, and exploiting memory bugs. The first group, Toddler's Bottle, is meant for newcomers, and the later groups get much harder. It suits people who know some C and Linux.
The challenges use shared SSH logins, and you submit flags on the website to score points. Solutions for Toddler's Bottle may be posted online, and the rules forbid denial of service activity on the servers.
On Breakpoint since 23 Oct 2026.