Role based access control is very simple: every user has a list of roles, which that user is allowed to assume, and every restricted part of the app makes an assertion about the necessary roles. If the user is a member in all of the required roles access is granted. Otherwise, access is denied.
Binary packages can be installed with pkgin or pkg_add(1). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.