Verify that audit tools are owned by root
このページは日本語には対応しておりません。随時翻訳に取り組んでいます。
翻訳に関してご質問やご意見ございましたら、
お気軽にご連絡ください。
Description
The Ubuntu 20.04 operating system audit tools must have the proper
ownership configured to protected against unauthorized access.
Verify it by running the following command:
$ stat -c "%n %U" /sbin/auditctl /sbin/aureport /sbin/ausearch /sbin/autrace /sbin/auditd /sbin/audispd /sbin/augenrules
/sbin/auditctl root
/sbin/aureport root
/sbin/ausearch root
/sbin/autrace root
/sbin/auditd root
/sbin/audispd root
/sbin/augenrules root
Audit tools needed to successfully view and manipulate audit information
system activity and records. Audit tools include custom queries and report
generators
Rationale
Protecting audit information also includes identifying and protecting the
tools used to view and manipulate log data. Therefore, protecting audit
tools is necessary to prevent unauthorized operation on audit information.
Operating systems providing tools to interface with audit information
will leverage user permissions and roles identifying the user accessing the
tools and the corresponding rights the user enjoys to make access decisions
regarding the access to audit tools.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
chown 0 /sbin/auditctl
chown 0 /sbin/aureport
chown 0 /sbin/ausearch
chown 0 /sbin/autrace
chown 0 /sbin/auditd
chown 0 /sbin/audispd
chown 0 /sbin/augenrules
Ansible playbook
The following playbook can be run with Ansible to remediate the issue.
- name: Test for existence /sbin/auditctl
stat:
path: /sbin/auditctl
register: file_exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure owner 0 on /sbin/auditctl
file:
path: /sbin/auditctl
owner: '0'
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Test for existence /sbin/aureport
stat:
path: /sbin/aureport
register: file_exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure owner 0 on /sbin/aureport
file:
path: /sbin/aureport
owner: '0'
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Test for existence /sbin/ausearch
stat:
path: /sbin/ausearch
register: file_exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure owner 0 on /sbin/ausearch
file:
path: /sbin/ausearch
owner: '0'
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Test for existence /sbin/autrace
stat:
path: /sbin/autrace
register: file_exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure owner 0 on /sbin/autrace
file:
path: /sbin/autrace
owner: '0'
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Test for existence /sbin/auditd
stat:
path: /sbin/auditd
register: file_exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure owner 0 on /sbin/auditd
file:
path: /sbin/auditd
owner: '0'
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Test for existence /sbin/audispd
stat:
path: /sbin/audispd
register: file_exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure owner 0 on /sbin/audispd
file:
path: /sbin/audispd
owner: '0'
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Test for existence /sbin/augenrules
stat:
path: /sbin/augenrules
register: file_exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure owner 0 on /sbin/augenrules
file:
path: /sbin/augenrules
owner: '0'
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- DISA-STIG-UBTU-20-010200
- configure_strategy
- file_ownership_audit_binaries
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed