Oracle instance names must not contain Oracle version numbers.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-270521	SRG-APP-000516-DB-000363	O19C-00-008600	SV-270521r1112467_rule	2025-06-24	1

Description
Service names may be discovered by unauthenticated users. If the service name includes version numbers or other database product information, a malicious user may use that information to develop a targeted attack.

ℹ️ Check
If using a non-CDB database: From SQLPlus: select instance_name, version from v$instance; If using a CDB database: To check the container database (CDB): From SQLPlus: select instance_name, version from v$instance; To check the pluggable databases (PDBs) within the CDB: select name from v$pdbs; Check Instance Name: If the instance name returned references the Oracle release number, this is a finding. Numbers used that include version numbers by coincidence are not a finding. The database administrator (DBA) should be able to relate the significance of the presence of a digit in the SID.

ℹ️ Check

If using a non-CDB database: From SQL*Plus: select instance_name, version from v$instance; If using a CDB database: To check the container database (CDB): From SQL*Plus: select instance_name, version from v$instance; To check the pluggable databases (PDBs) within the CDB: select name from v$pdbs; Check Instance Name: If the instance name returned references the Oracle release number, this is a finding. Numbers used that include version numbers by coincidence are not a finding. The database administrator (DBA) should be able to relate the significance of the presence of a digit in the SID.

✔️ Fix
Follow the instructions in Oracle MetaLink Note 15390.1 (and related documents) to change the SID for the database without recreating the database to a value that does not identify the Oracle version.