The DBMS must have its auditing configured to reduce the likelihood of storage capacity being exceeded.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-61613	O121-C2-005600	SV-76103r1_rule		Medium

Description
Applications need to be cognizant of potential audit log storage capacity issues. During the installation and/or configuration process, applications should detect and determine if adequate storage capacity has been allocated for audit logs. During the installation process, a notification may be provided to the installer indicating, based on the auditing configuration chosen and the amount of storage space allocated for audit logs, the amount of storage capacity available is not sufficient to meet storage requirements. Logging must be configured appropriately. If the logs generated outstrip the amount of space reserved for those logs, the system may shut down or take other measures to stop processing in order to protect transactions from continuing unlogged.

Description

Applications need to be cognizant of potential audit log storage capacity issues. During the installation and/or configuration process, applications should detect and determine if adequate storage capacity has been allocated for audit logs. During the installation process, a notification may be provided to the installer indicating, based on the auditing configuration chosen and the amount of storage space allocated for audit logs, the amount of storage capacity available is not sufficient to meet storage requirements. Logging must be configured appropriately. If the logs generated outstrip the amount of space reserved for those logs, the system may shut down or take other measures to stop processing in order to protect transactions from continuing unlogged.

STIG	Date
Oracle Database 12c Security Technical Implementation Guide	2018-09-18

Details

Check Text ( C-62485r2_chk )
Review the DBMS settings to determine whether audit logging is configured to produce logs consistent with the amount of space allocated for logging. If auditing will generate excessive logs so that they may outgrow the space reserved for logging, this is a finding. If file-based auditing is in use, check that sufficient space is available to support the file(s). If not, this is a finding If standard, table-based auditing is used: The audit logs are written to a table called AUD$, and if a Virtual Private Database is deployed, we also create a table called FGA_LOG$. First check the current location of the audit trail tables. CONN / AS SYSDBA SELECT table_name, tablespace_name FROM dba_tables WHERE table_name IN ('AUD$', 'FGA_LOG$') ORDER BY table_name; TABLE_NAME TABLESPACE_NAME -------------- ------------------ AUD$ SYSTEM FGA_LOG$ SYSTEM If the tablespace_name is SYSTEM, the table needs to be relocated to its own tablespace. Ensure that adequate space is allocated to that tablespace. If Unified Auditing is used: Audit logs are written to tables in the AUDSYS schema. The default tablespace for AUDSYS is USERS. A separate tablespace should be created to contain audit data. Ensure that adequate space is allocated to that tablespace.

Check Text ( C-62485r2_chk )

Review the DBMS settings to determine whether audit logging is configured to produce logs consistent with the amount of space allocated for logging. If auditing will generate excessive logs so that they may outgrow the space reserved for logging, this is a finding.

If file-based auditing is in use, check that sufficient space is available to support the file(s). If not, this is a finding

If standard, table-based auditing is used: The audit logs are written to a table called AUD$, and if a Virtual Private Database is deployed, we also create a table called FGA_LOG$. First check the current location of the audit trail tables.

CONN / AS SYSDBA

SELECT table_name, tablespace_name
FROM dba_tables
WHERE table_name IN ('AUD$', 'FGA_LOG$')
ORDER BY table_name;

TABLE_NAME TABLESPACE_NAME
-------------- ------------------
AUD$ SYSTEM
FGA_LOG$ SYSTEM

If the tablespace_name is SYSTEM, the table needs to be relocated to its own tablespace. Ensure that adequate space is allocated to that tablespace.

If Unified Auditing is used:
Audit logs are written to tables in the AUDSYS schema. The default tablespace for AUDSYS is USERS. A separate tablespace should be created to contain audit data. Ensure that adequate space is allocated to that tablespace.

Fix Text (F-67529r1_fix)
Allocate sufficient disk space for file-based audit. Ensure that audit tables are in their own tablespaces and that the tablespaces have enough room for the volume of log data that will be produced.