6.23 Restrict Access to SYSCAT.SCHEMAAUTH

Information

The SYSCAT.SCHEMAAUTH contains a list of all users that have one or more privileges or access to a particular schema. It is recommended that the PUBLIC role be restricted from accessing this view.

PUBLIC should not have access to see all the grants of schemas to users or groups because this could be used as a point of exploit.

Solution

Perform the following to revoke access from PUBLIC.
1. Connect to the DB2 database.
db2 => connect to $DB2INSTANCE user $USERNAME using $PASSWORD
2. Run the following command from the DB2 command window:
db2 => REVOKE SELECT ON SYSCAT.SCHEMAAUTH FROM PUBLIC

See Also

https://workbench.cisecurity.org/files/1654

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6

Plugin: IBM_DB2DB

Control ID: 2f12283a22c8389684366cfeb95b7c9d04b8d50de64b99a303c79bbeedb6e268