Audit Tools Must Have a Mode of 0755 or Less Permissive

An XCCDF Rule

Description

Oracle Linux 8 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. Audit tools include, but are not limited to, vendor-provided and open source audit tools needed to successfully view and manipulate audit information system activity and records. Audit tools include custom queries and report generators. Audit tools must have a mode of 0755 or less permissive.

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 operations on audit information.

ID: xccdf_org.ssgproject.content_rule_file_audit_tools_permissions
Severity: Medium
References: CCI-001493

AU-9

SRG-OS-000256-GPOS-00097 SRG-OS-000257-GPOS-00098 SRG-OS-000258-GPOS-00099

OL08-00-030620

SV-248807r991557_rule
Updated: over 1 year ago

Remediation Templates

- name: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
- name: Test for existence /sbin/auditctl
  stat:
    path: /sbin/auditctl
  register: file_exists
  when: '"kernel" in ansible_facts.packages'
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure permission u-s,g-ws,o-wt on /sbin/auditctl
  file:
    path: /sbin/auditctl
    mode: u-s,g-ws,o-wt
  when:
  - '"kernel" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Test for existence /sbin/aureport
  stat:
    path: /sbin/aureport
  register: file_exists
  when: '"kernel" in ansible_facts.packages'
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure permission u-s,g-ws,o-wt on /sbin/aureport
  file:
    path: /sbin/aureport
    mode: u-s,g-ws,o-wt
  when:
  - '"kernel" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Test for existence /sbin/ausearch
  stat:
    path: /sbin/ausearch
  register: file_exists
  when: '"kernel" in ansible_facts.packages'
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure permission u-s,g-ws,o-wt on /sbin/ausearch
  file:
    path: /sbin/ausearch
    mode: u-s,g-ws,o-wt
  when:
  - '"kernel" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Test for existence /sbin/autrace
  stat:
    path: /sbin/autrace
  register: file_exists
  when: '"kernel" in ansible_facts.packages'
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure permission u-s,g-ws,o-wt on /sbin/autrace
  file:
    path: /sbin/autrace
    mode: u-s,g-ws,o-wt
  when:
  - '"kernel" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Test for existence /sbin/auditd
  stat:
    path: /sbin/auditd
  register: file_exists
  when: '"kernel" in ansible_facts.packages'
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure permission u-s,g-ws,o-wt on /sbin/auditd
  file:
    path: /sbin/auditd
    mode: u-s,g-ws,o-wt
  when:
  - '"kernel" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Test for existence /sbin/rsyslogd
  stat:
    path: /sbin/rsyslogd
  register: file_exists
  when: '"kernel" in ansible_facts.packages'
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure permission u-s,g-ws,o-wt on /sbin/rsyslogd
  file:
    path: /sbin/rsyslogd
    mode: u-s,g-ws,o-wt
  when:
  - '"kernel" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Test for existence /sbin/augenrules
  stat:
    path: /sbin/augenrules
  register: file_exists
  when: '"kernel" in ansible_facts.packages'
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure permission u-s,g-ws,o-wt on /sbin/augenrules
  file:
    path: /sbin/augenrules
    mode: u-s,g-ws,o-wt
  when:
  - '"kernel" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - DISA-STIG-OL08-00-030620
  - NIST-800-53-AU-9
  - configure_strategy
  - file_audit_tools_permissions
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

# Remediation is applicable only in certain platforms
if rpm --quiet -q kernel; then
chmod u-s,g-ws,o-wt /sbin/auditctl

chmod u-s,g-ws,o-wt /sbin/aureport
chmod u-s,g-ws,o-wt /sbin/ausearch

chmod u-s,g-ws,o-wt /sbin/autrace

chmod u-s,g-ws,o-wt /sbin/auditd

chmod u-s,g-ws,o-wt /sbin/rsyslogd

chmod u-s,g-ws,o-wt /sbin/augenrules

else
    >&2 echo 'Remediation is not applicable, nothing was done'
fi

Audit Tools Must Have a Mode of 0755 or Less Permissive

Description

Rationale

Remediation Templates

An Ansible Snippet

A Shell Script