RHEL 9 must not have the ypserv package installed.

Documentable No

Rule ID SV-257829r1044896_rule

CCI References

CCI-000381

Discussion

The NIS service provides an unencrypted authentication service, which does not provide for the confidentiality and integrity of user passwords or the remote session. Removing the "ypserv" package decreases the risk of the accidental (or intentional) activation of NIS or NIS+ services.

Check Procedure

Verify that the ypserv package is not installed with the following command:

$ dnf list --installed ypserv

Error: No matching Packages to list

If the "ypserv" package is installed, this is a finding.

Fix Action

Remove the ypserv package with the following command:

$ sudo dnf remove ypserv