Master of PHP writeup (Real World CTF 2019)
Another writeup Before continuing, open another solution in a browser tab (yes, we solved the same challenge twice. Well almost). My teammate @paulcher used CVE-2019-5482 to »
printf write-up (Tokyo Westerns CTF 2019)
printf was a pretty typical pwn task: you get binary, libc, network address, and you have to gain an RCE. The vulnerability is an unsafe alloca »
Unknocking write-up (CyBRICS CTF 2019 Quals)
Unknocking was a networking task on CyBRICS CTF 2019 quals. The objective of the task was to reverse engineer a port knocking daemon that implements unconventional »
GoogleCTF 2019 GPhotos writeup
Challenge description The challenge is an image storage service implemented as a PHP script. The source can be retrieved via a hidden link on the main »
DevMaster 8000 and 8001 write-up (Google CTF 2019 Quals)
DevMaster 8000 and DevMaster 8001 were sandbox challenges on Google CTF 2019 quals. The gist is it provided a compilation service over an asynchronous binary protocol. »