dbcc stored procedures access the tables only in the dbccdb database or in the alternate database, dbccalt.
See the System Administration Guide for details on setting up dbccdb or dbccalt. See dbccdb Tables in Reference Manual: Tables for information on the tables used in these databases.
For details on the dbcc system procedure sp_plan_dbccdb, see sp_plan_dbccdb. See the System Administration Guide for more information on this system procedure and the dbcc stored procedures.
The permission checks for dbcc stored procedures differ based on your granular permissions settings. See the Security Administration Guide for more information on granular permissions.