Verify Permissions on /etc/audit/rules.d/*.rules
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Description
To properly set the permissions of /etc/audit/rules.d/*.rules, run the command:
$ sudo chmod 0640 /etc/audit/rules.d/*.rules
Rationale
Without the capability to restrict the roles and individuals that can select which events
are audited, unauthorized personnel may be able to prevent the auditing of critical
events. Misconfigured audits may degrade the system’s performance by overwhelming
the audit log. Misconfigured audits may also make it more difficult to establish,
correlate, and investigate the events relating to an incident or identify
those responsible for one.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
find -H /etc/audit/rules.d/ -maxdepth 1 -perm /u+xs,g+xws,o+xwrt -type f -regextype posix-extended -regex '^.*rules$' -exec chmod u-xs,g-xws,o-xwrt {} \;
Ansible playbook
The following playbook can be run with Ansible to remediate the issue.
- name: Find /etc/audit/rules.d/ file(s)
command: find -H /etc/audit/rules.d/ -maxdepth 1 -perm /u+xs,g+xws,o+xwrt -type
f -regextype posix-extended -regex "^.*rules$"
register: files_found
changed_when: false
failed_when: false
check_mode: false
tags:
- DISA-STIG-UBTU-20-010133
- NIST-800-53-AU-12(b)
- configure_strategy
- file_permissions_etc_audit_rulesd
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Set permissions for /etc/audit/rules.d/ file(s)
file:
path: '{{ item }}'
mode: u-xs,g-xws,o-xwrt
state: file
with_items:
- '{{ files_found.stdout_lines }}'
tags:
- DISA-STIG-UBTU-20-010133
- NIST-800-53-AU-12(b)
- configure_strategy
- file_permissions_etc_audit_rulesd
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
