Title

The Red Hat Enterprise Linux operating system must not have the ypserv package installed. (Cat I impact)

Discussion

Removing the "ypserv" package decreases the risk of the accidental (or intentional) activation of NIS or NIS+ services.

Check Content

The NIS service provides an unencrypted authentication service that does not provide for the confidentiality and integrity of user passwords or the remote session. Check to see if the "ypserve" package is installed with the following command: # yum list installed ypserv If the "ypserv" package is installed, this is a finding.

Fix Text

Configure the operating system to disable non-essential capabilities by removing the "ypserv" package from the system with the following command: # yum remove ypserv

Additional Identifiers

Rule ID: SV-204443r958478_rule

Vulnerability ID: V-204443

Group Title: SRG-OS-000095-GPOS-00049

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.