global_writer

JA / EN Author: sashiming Just make 'em all global. Way easier.

For beginners:

First of all, download the attachments and see the source file. The goal of this challenge is to execute /bin/sh within the program running on the remote server. Once successful, find and read the flag file stored on the server. You can find plenty of information on attack methods by searching online. Let’s try out a few different ones.