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To properly set the permissions of /etc/shadow-
, run the command:
$ sudo chmod 0640 /etc/shadow-
The /etc/shadow-
file is a backup file of /etc/shadow
, and as such,
it contains the list of local system accounts and password hashes.
Protection of this file is critical for system security.
The following script can be run on the host to remediate the issue.
#!/bin/bash
chmod u-xs,g-xws,o-xwrt /etc/shadow-
The following playbook can be run with Ansible to remediate the issue.
- name: Test for existence /etc/shadow-
stat:
path: /etc/shadow-
register: file_exists
tags:
- NIST-800-53-AC-6 (1)
- PCI-DSS-Req-8.7.c
- PCI-DSSv4-2.2.6
- configure_strategy
- file_permissions_backup_etc_shadow
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure permission u-xs,g-xws,o-xwrt on /etc/shadow-
file:
path: /etc/shadow-
mode: u-xs,g-xws,o-xwrt
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- NIST-800-53-AC-6 (1)
- PCI-DSS-Req-8.7.c
- PCI-DSSv4-2.2.6
- configure_strategy
- file_permissions_backup_etc_shadow
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed