Heimdal is a free implementation of Kerberos 5. Kerberos is a system for authenticating users and services on a network. It is built upon the assumption that the network is "unsafe". Kerberos is a trusted third-party service. That means that there is a third party (the Kerberos server) that is trusted by all the entities on the network (users and services, usually called "principals"). All principals share a secret password (or key) with the Kerberos server and this enables principals to verify that the messages from the Kerberos server are authentic. Thus trusting the Kerberos server, users and services can authenticate each other.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). 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.