TOSS must allocate audit record storage capacity to store at least one week's worth of audit records, when audit records are not immediately sent to a central audit record storage facility.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-253031	TOSS-04-030890	SV-253031r824765_rule		Medium

Description
In order to ensure TOSS systems have a sufficient storage capacity in which to write the audit logs, TOSS needs to be able to allocate audit record storage capacity. The task of allocating audit record storage capacity is usually performed during initial installation of TOSS. If an external logging system is used to aggregate and store logs for at least one week, this requirement is Not Applicable.

Description

In order to ensure TOSS systems have a sufficient storage capacity in which to write the audit logs, TOSS needs to be able to allocate audit record storage capacity. The task of allocating audit record storage capacity is usually performed during initial installation of TOSS. If an external logging system is used to aggregate and store logs for at least one week, this requirement is Not Applicable.

STIG	Date
Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide	2022-08-29

Details

Check Text ( C-56484r824763_chk )
Verify TOSS allocates audit record storage capacity to store at least one week of audit records when audit records are not immediately sent to a central audit record storage facility. If logs are immediately sent to a central audit record storage facility, this requirement is Not Applicable. Determine to which partition the audit records are being written with the following command: $ sudo grep 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 (with the example being /var/log/audit/) with the following command: $ sudo df -h /var/log/audit/audit.log /dev/sda2 24G 10.4G 13.6G 43% /var/log/audit If the audit records are not written to a partition made specifically for audit records (/var/log/audit is a separate partition), determine the amount of space being used by other files in the partition with the following command: $ sudo du -sh [audit_partition] 1.8G /var/log/audit If the audit record partition is not allocated for sufficient storage capacity, this is a finding. Note: The partition size needed to capture a week of audit records is based on the activity level of the system and the total storage capacity available. Typically, 10.0 GB of storage space for audit records should be sufficient.

Check Text ( C-56484r824763_chk )

Verify TOSS allocates audit record storage capacity to store at least one week of audit records when audit records are not immediately sent to a central audit record storage facility.

If logs are immediately sent to a central audit record storage facility, this requirement is Not Applicable.

Determine to which partition the audit records are being written with the following command:

$ sudo grep 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 (with the example being /var/log/audit/) with the following command:

$ sudo df -h /var/log/audit/audit.log
/dev/sda2 24G 10.4G 13.6G 43% /var/log/audit

If the audit records are not written to a partition made specifically for audit records (/var/log/audit is a separate partition), determine the amount of space being used by other files in the partition with the following command:

$ sudo du -sh [audit_partition]
1.8G /var/log/audit

If the audit record partition is not allocated for sufficient storage capacity, this is a finding.

Note: The partition size needed to capture a week of audit records is based on the activity level of the system and the total storage capacity available. Typically, 10.0 GB of storage space for audit records should be sufficient.

Fix Text (F-56434r824764_fix)
Allocate enough storage capacity for at least one week of audit records when audit records are not immediately sent to a central audit record storage facility. If audit records are stored on a partition made specifically for audit records, resize the partition with sufficient space to contain one week of audit records. If audit records are not stored on a partition made specifically for audit records, a new partition with sufficient space will need be to be created.

Fix Text (F-56434r824764_fix)

Allocate enough storage capacity for at least one week of audit records when audit records are not immediately sent to a central audit record storage facility.

If audit records are stored on a partition made specifically for audit records, resize the partition with sufficient space to contain one week of audit records.

If audit records are not stored on a partition made specifically for audit records, a new partition with sufficient space will need be to be created.