STIGQter: STIG Summary: SUSE Linux Enterprise Server 15 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

The SUSE operating system auditd service must notify the System Administrator (SA) and Information System Security Officer (ISSO) immediately when audit storage capacity is 75 percent full.

DISA Rule

SV-234969r622137_rule

Vulnerability Number

V-234969

Group Title

SRG-OS-000343-GPOS-00134

Rule Version

SLES-15-030700

Severity

CAT II

CCI(s)

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

Weight

10

Fix Recommendation

Check the system configuration to determine the partition to which the audit records are written:

> sudo grep -iw log_file /etc/audit/auditd.conf

Determine the size of the partition to which audit records are written (e.g., "/var/log/audit/"):

> df -h /var/log/audit/

Set the value of the "space_left" keyword in "/etc/audit/auditd.conf" to 25 percent of the partition size.

Check Contents

Determine if the SUSE operating system auditd is configured to notify the SA and ISSO when the audit record storage volume reaches 75 percent of the storage capacity.

Check the system configuration to determine the partition to which audit records are written using the following command:

> sudo grep -iw log_file /etc/audit/auditd.conf
log_file = /var/log/audit/audit.log

Check the size of the partition to which audit records are written (e.g., "/var/log/audit/"):

> df -h /var/log/audit/
/dev/sda2 24G 10.4G 13.6G 43% /var

If the audit records are not being written to a partition specifically created for audit records (in this example "/var/log/audit" is a separate partition), use the following command to determine the amount of space other files in the partition currently occupy:

> sudo du -sh <partition>
1.8G /var/log/audit

Determine the threshold for the system to take action when 75 percent of the repository maximum audit record storage capacity is reached:

> sudo grep -iw space_left /etc/audit/auditd.conf
space_left = 225

If the value of the "space_left" keyword is not set to 25 percent of the total partition size, this is a finding.

Vulnerability Number

V-234969

Documentable

False

Rule Version

SLES-15-030700

Severity Override Guidance

Determine if the SUSE operating system auditd is configured to notify the SA and ISSO when the audit record storage volume reaches 75 percent of the storage capacity.

Check the system configuration to determine the partition to which audit records are written using the following command:

> sudo grep -iw log_file /etc/audit/auditd.conf
log_file = /var/log/audit/audit.log

Check the size of the partition to which audit records are written (e.g., "/var/log/audit/"):

> df -h /var/log/audit/
/dev/sda2 24G 10.4G 13.6G 43% /var

If the audit records are not being written to a partition specifically created for audit records (in this example "/var/log/audit" is a separate partition), use the following command to determine the amount of space other files in the partition currently occupy:

> sudo du -sh <partition>
1.8G /var/log/audit

Determine the threshold for the system to take action when 75 percent of the repository maximum audit record storage capacity is reached:

> sudo grep -iw space_left /etc/audit/auditd.conf
space_left = 225

If the value of the "space_left" keyword is not set to 25 percent of the total partition size, this is a finding.

Check Content Reference

M

Target Key

5274

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