Detections
Analytics
O19C-00-005900 - The Oracle Database, or the logging or alerting mechanism the application uses, must provide a warning when allocated audit record storage volume record storage volume reaches 75 percent of maximum audit record storage capacity.
Information
Organizations are required to use a central log management system, so, under normal conditions, the audit space allocated to the database management system (DBMS) on its own server will not be an issue. However, space will still be required on the DBMS server for audit records in transit, and, under abnormal conditions, this could fill up. Since a requirement exists to halt processing upon audit failure, a service outage would result.If support personnel are not notified immediately upon storage volume usage reaching 75 percent, they are unable to plan for storage capacity expansion.
The appropriate support staff include, at a minimum, the information system security officer (ISSO) and the database administrator (DBA)/system administrator (SA).
NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Solution
Modify DBMS, OS, or third-party logging application settings to alert appropriate personnel when 75 percent of log storage capacity is reached.For ease of management, it is recommended that the audit tables be kept in a dedicated tablespace.
If Oracle Enterprise Manager is in use, the capability to issue such an alert is built in and configurable via the console so an email can be sent to a designated administrator.
If Enterprise Manager is unavailable, the following script can be used to monitor storage space; this can be combined with additional code to email the appropriate administrator so they can take action.
sqlplus connect as sysdba
set pagesize 300
set linesize 120
column sumb format 9,999,999,999,999
column extents format 999999
column bytes format 9,999,999,999,999
column largest format 9,999,999,999,999
column Tot_Size format 9,999,999,999,999
column Tot_Free format 9,999,999,999,999
column Pct_Free format 9,999,999,999,999
column Chunks_Free format 9,999,999,999,999
column Max_Free format 9,999,999,999,999
set echo off
spool TSINFO.txt
PROMPT SPACE AVAILABLE IN TABLESPACES
select a.tablespace_name,sum(a.tots) Tot_Size,
sum(a.sumb) Tot_Free,
sum(a.sumb)*100/sum(a.tots) Pct_Free,
sum(a.largest) Max_Free,sum(a.chunks) Chunks_Free
from
(
select tablespace_name,0 tots,sum(bytes) sumb,
max(bytes) largest,count(*) chunks
from dba_free_space a
group by tablespace_name
union
select tablespace_name,sum(bytes) tots,0,0,0 from
dba_data_files
group by tablespace_name) a
group by a.tablespace_name;
Sample Output
SPACE AVAILABLE IN TABLESPACES
TABLESPACE_NAME TOT_SIZE TOT_FREE PCT_FREE MAX_FREE CHUNKS_FREE
----------------------------- -------------- -------------- --------------- ---------------- ---------------------
DES2 41,943,040 30,935,040 74 30,935,040 1
DES2_I 31,457,280 23,396,352 74 23,396,352 1
RBS 60,817,408 57,085,952 94 52,426,752 16
SYSTEM 94,371,840 5,386,240 6 5,013,504 3
TEMP 563,200 561,152 100 133,120 5
TOOLS 120,586,240 89,407,488 74 78,190,592 12
USERS 1,048,576 26,624 3 26,624 1
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Oracle_Database_19c_V1R1_STIG.zip
Item Details
Audit Name: DISA Oracle Database 19c STIG v1r1 Database
Category: AUDIT AND ACCOUNTABILITY
References: 800-53|AU-5(1), CAT|II, CCI|CCI-001855, Rule-ID|SV-270508r1065201_rule, STIG-ID|O19C-00-005900, Vuln-ID|V-270508
Plugin: OracleDB
Control ID: 3518dba79be92ed7272b0fd103783131e62856a45b412a3590b6e2cff63af99c