UNIX & Security: Describes many of the security features of the UNIX operating system, as well as features that could be added to result in an evaluatable system at Class C2
You can download it from the following link: https://packetstormsecurity.com/files/download/16221/unixsec.ps
Source: https://packetstormsecurity.com/files/16221/unixsec.ps.html