The UNIX world was hardly a model of security until somewhere around 2000. Both HP-UX and Irix of that era could be hilariously insecure, with it being utterly trivial to break through the permissions model.
Thanks to UNIX boxes being the bulk of the always on systems attached to the internet at that time they presented most of the attack surface, and consequently an industry of people to attempt to protect them.
Thanks to UNIX boxes being the bulk of the always on systems attached to the internet at that time they presented most of the attack surface, and consequently an industry of people to attempt to protect them.