This was a fun challenge, just because I didn’t pay attention in the beginning. To start log in with the provided credentials. After logging of course I used “ls” to see what I have in the current directory. Oh … the flag is here. That looks to easy, but lets use “cat” to see what is the content in the file. Shit…. nothing is happening. How can I view the file. Now … when doing CTFs usually there is a clue in the name of the challenge. This one is called Catalias – “cat”, “alias”. Lets list the alias to see what we work with. As you can see from…

This was an interesting small challenge. We have been given the password to ssh in to the machine. After we do of course we would like to run a “sl” or sl -al” commands to see what we have in the current directory. Oh wow a directory with a name secret. Lets cd in to that folder. Opps we can’t! This command tells us something important. We are working on “restricted bash”. Please see the image bellow. Now it is a matter of knowing how to escape that. A simple google search can give you the result. As always I will post a link in the end of the article.…