STIGQter: STIG Summary: Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 01 Jul 2026:

Ubuntu 24.04 LTS must immediately notify the system administrator (SA) and information system security officer (ISSO) (at a minimum) when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.

DISA Rule

SV-270818r1066943_rule

Vulnerability Number

V-270818

Group Title

SRG-OS-000343-GPOS-00134

Rule Version

UBTU-24-900960

Severity

CAT III

CCI(s)

• CCI-001855 - Provide a warning to organization-defined personnel, roles, and/or locations within an organization-defined time period when allocated audit log storage volume reaches an organization-defined percentage of repository maximum audit log storage capacity.

Weight

10

Fix Recommendation

Edit "/etc/audit/auditd.conf" and set the "space_left_action" parameter to "exec" or "email".

If the "space_left_action" parameter is set to "email", set the "action_mail_acct" parameter to an email address for the SA and ISSO.

If the "space_left_action" parameter is set to "exec", ensure the command being executed notifies the SA and ISSO.

Edit "/etc/audit/auditd.conf" and set the "space_left" parameter to be at least 25 percent of the repository maximum audit record storage capacity.

Check Contents

Verify Ubuntu 24.04 LTS notifies the SA and ISSO (at a minimum) when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity with the following command:

Note: If the space_left_action is set to "email", an email package must be available.

$ sudo grep ^space_left_action /etc/audit/auditd.conf
space_left_action email

$ sudo grep ^space_left /etc/audit/auditd.conf
space_left 250000

If the "space_left" parameter is set to "syslog", is missing, set to blanks, or set to a value less than 25 percent of the space free in the allocated audit record storage, this is a finding.

If the "space_left_action" parameter is missing or set to blanks, this is a finding.

If the "space_left_action" is set to "email", check the value of the "action_mail_acct" parameter with the following command:

$ sudo grep ^action_mail_acct /etc/audit/auditd.conf
action_mail_acct root@localhost

The "action_mail_acct" parameter, if missing, defaults to "root". If the "action_mail_acct parameter" is not set to the email address of the SA(s) and/or ISSO, this is a finding.

If the "space_left_action" is set to "exec", the system executes a designated script. If this script informs the SA of the event, this is not a finding.

Vulnerability Number

V-270818

Documentable

False

Rule Version

UBTU-24-900960

Severity Override Guidance

Verify Ubuntu 24.04 LTS notifies the SA and ISSO (at a minimum) when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity with the following command:

Note: If the space_left_action is set to "email", an email package must be available.

$ sudo grep ^space_left_action /etc/audit/auditd.conf
space_left_action email

$ sudo grep ^space_left /etc/audit/auditd.conf
space_left 250000

If the "space_left" parameter is set to "syslog", is missing, set to blanks, or set to a value less than 25 percent of the space free in the allocated audit record storage, this is a finding.

If the "space_left_action" parameter is missing or set to blanks, this is a finding.

If the "space_left_action" is set to "email", check the value of the "action_mail_acct" parameter with the following command:

$ sudo grep ^action_mail_acct /etc/audit/auditd.conf
action_mail_acct root@localhost

The "action_mail_acct" parameter, if missing, defaults to "root". If the "action_mail_acct parameter" is not set to the email address of the SA(s) and/or ISSO, this is a finding.

If the "space_left_action" is set to "exec", the system executes a designated script. If this script informs the SA of the event, this is not a finding.

Check Content Reference

M

Target Key

5673