Oracle instance names must not contain Oracle version numbers.

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.

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.

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.