Vulnerability in the Database Filesystem component of Oracle Database Server. Supported versions that are affected are 11.2.0.4, 12.1.0.2 and 12.2.0.1. Easily exploitable vulnerability allows high privileged attacker having Resource, Create Table, Create View, Create Procedure, Dbfs_role privilege with network access via Oracle Net to compromise Database Filesystem. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Database Filesystem. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).