Trying to delve into web application hacking, I installed a dedicated Virtual Lab set up by the academic SEED project. The pre-built VM (based on Ubuntu 16.04) was already configured with everything needed for the requirements of the challenges.
As the VM fullscreen mode was activated, I expected the guest-additions/dkms packages to be installed, but that didn't seem to be the case : neither
dpkg -l guest nor
dpkg -s virtualbox-guest-utils nor even
dpkg -s virtualbox-guest-dkms command was actually able to locate said packages.
So just out of curiosity, did I look at the wrong spots, or did they use another technique to get the fullscreen mode without the guest additions drivers ?
NB.: I've of course tried other commands to try to locate the packages, as
dpkg -l | grep guest, but with no more success.