Uninstall ypserv Package

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Description

The ypserv package can be removed with the following command:


$ sudo yum erase ypserv

Rationale

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.

Remediation

Shell script

The following script can be run on the host to remediate the issue.

#!/bin/bash

# CAUTION: This remediation script will remove ypserv
#	   from the system, and may remove any packages
#	   that depend on ypserv. Execute this
#	   remediation AFTER testing on a non-production
#	   system!

if rpm -q --quiet "ypserv" ; then

    yum remove -y "ypserv"

fi

Ansible playbook

The following playbook can be run with Ansible to remediate the issue.

- name: Ensure ypserv is removed
  package:
    name: ypserv
    state: absent
  tags:
  - CCE-27399-5
  - DISA-STIG-RHEL-07-020010
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - NIST-800-53-IA-5(1)(c)
  - PCI-DSS-Req-2.2.2
  - PCI-DSSv4-2.2.4
  - disable_strategy
  - high_severity
  - low_complexity
  - low_disruption
  - no_reboot_needed
  - package_ypserv_removed