Preface: Every time you review Oracle security advisory. Your feeling is vague since no details will be provided!
Vulnerability details: A vulnerability in the Core RDBMS component of Oracle Database Server could allow an authenticated, remote attacker with high privileges to compromise a targeted system completely.
More details: The vulnerability resides in the Java Virtual Machine component of the Oracle Database Server and does not require user interaction. The vulnerability allows low-privileged attackers that have Create Session privilege with network access via Oracle Net to compromise the Java VM component.
How to identify your JVM for Oracle:
select * from all_registry_banners;
Impact: Since the vulnerability happen on JVM. Therefore successful exploit could allow the attacker to compromise the system completely.
Affected products: Oracle Database Server 12c12.2 (.0.1), Oracle Database Server 18cRelease Update 6 (18.6) (Base)
Remedy: Oracle released software updates at the following link – https://www.oracle.com/downloads/index.html