34c3 junior CTF 2017, crypto (kim)
This is the first crypto challenge I solved which was really interesting to work on. When entering the given URL from the challenge description, the …
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Google CTF 2017, joe, web
Joe, your intelligent conversation partner For the Joe challenge, you got access to a simple page which looked like a chat. Over a text box you were …
VolgaCTF, web200 (Share Point)
The only accessible page for Share Point was a login form. After fiddling with the login, I noticed that you were able to login with some basic …
ASIS CTF 2017, Tar Bomb, Web129
This was not a typical web challenge, apart from beeing accessible over the web. The aim was to successfully execute a tar command (and do something …
nullcon 2017, pwn200
Exploitation was straight forward by abusing a format string vulnerability to overwrite .got. The strchr was called immediately after the printf call …