Ensure that access to the catalog tables in the communications database (CDB) is restricted

Cómo se verifica

Método de auditoría: Revisión manual

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For Db2 internal security users: Issue the following SQL statement to check if PUBLIC has access: SELECT GRANTEE, TCREATOR, TTNAME FROM SYSIBM.SYSTABAUTH WHERE TCREATOR = 'SYSIBM' AND TTNAME IN ('LOCATIONS', 'IPNAMES', 'IPLIST', 'LUNAMES', 'LULIST', 'LUMODES', 'MODESELECT', 'USERNAMES') AND GRANTEE = 'PUBLIC'; Output that contains zero rows is considered a successful finding. Otherwise, PUBLIC has SELECT, INSERT, UPDATE, or DELETE privilege and the remediation steps should be followed. For external security users: Issue the RACF RLIST command to list the ... (full steps: CIS section 2.2.1)

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

For Db2 internal security users: Issue the SQL REVOKE statement to revoke access from PUBLIC. For external security users: Issue the RACF RALTER command to update the profiles and change the UACC setting to NONE. Issue the RACF PERMIT command to remove the ID(*) and specify users or groups.