4.3.4 Restrict Access to SYSIBM.SYSCOLDIST

Information

The SYSIBM.SYSCOLDIST table contains the nth most frequent value of some column, or the nth quantile (cumulative distribution) value of the column. It is recommended that the PUBLIC role be restricted from accessing this table.

Rationale:

Any databases created without the RESTRICT option automatically GRANT the SELECT privilege to PUBLIC for SYSIBM tables. Therefore, it is strongly recommended to explicitly REVOKE the SELECT privilege on the SYSIBM.SYSCOLDIST table from PUBLIC to reduce risk to the organization's data.

Solution

Perform the following to revoke access from PUBLIC.

Connect to the Db2 database.

db2 => connect to <dbname>

Run the following command:

db2 => REVOKE SELECT ON SYSIBM.SYSCOLDIST FROM PUBLIC

See Also

https://workbench.cisecurity.org/benchmarks/10752

Item Details

Category: ACCESS CONTROL, MEDIA PROTECTION

References: 800-53|AC-3, 800-53|AC-5, 800-53|AC-6, 800-53|MP-2, CSCv7|14.6

Plugin: IBM_DB2DB

Control ID: 5b390bffc44b6d6807d53c7c409b755dfb5b70a53c559cbd79dfcdac48d84d2b