Verify Group Who Owns group File
Description
To properly set the group owner of /etc/group, run the command:
$ sudo chgrp root /etc/group
Rationale
The /etc/group file contains information regarding groups that are configured
on the system. Protection of this file is important for system security.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
if getent group "0" >/dev/null 2>&1; then
newgroup="0"
fi
if [[ -z ${newgroup} ]]; then
echo "0 is not a defined group on the system"
exit 1
fi
chgrp $newgroup /etc/group
Ansible playbook
The following playbook can be run with Ansible to remediate the issue.
- name: Set the file_groupowner_etc_group_newgroup variable if represented by gid
set_fact:
file_groupowner_etc_group_newgroup: '0'
tags:
- CJIS-5.5.2.2
- NIST-800-53-AC-6(1)
- NIST-800-53-CM-6(a)
- PCI-DSS-Req-8.7.c
- PCI-DSSv4-2.2
- PCI-DSSv4-2.2.6
- configure_strategy
- file_groupowner_etc_group
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Test for existence /etc/group
stat:
path: /etc/group
register: file_exists
tags:
- CJIS-5.5.2.2
- NIST-800-53-AC-6(1)
- NIST-800-53-CM-6(a)
- PCI-DSS-Req-8.7.c
- PCI-DSSv4-2.2
- PCI-DSSv4-2.2.6
- configure_strategy
- file_groupowner_etc_group
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure group owner on /etc/group
file:
path: /etc/group
group: '{{ file_groupowner_etc_group_newgroup }}'
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- CJIS-5.5.2.2
- NIST-800-53-AC-6(1)
- NIST-800-53-CM-6(a)
- PCI-DSS-Req-8.7.c
- PCI-DSSv4-2.2
- PCI-DSSv4-2.2.6
- configure_strategy
- file_groupowner_etc_group
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
