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

СредњаНиво 1Ручни прегледdb2-zos

Опис

The communications database (CDB) is a set of Db2 catalog tables that can be configured to control aspects of outbound and inbound connection requests. The SYSIBM.LOCATIONS table and SYSIBM.USERNAMES table are configured for using TCP/IP or SNA protocol. PUBLIC access to these tables exposes connection information for remote Db2 access, which can compromise the security of the server.

Како се проверава

Метод провере: Ручни преглед

Ова препорука се не може проверити аутоматски. Скенирање је наводи са овим упутствима када проследите --include-manual.

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)

Како се исправља

Метод исправке: Смерница или закрпа инфраструктуре

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.

Својства

Оперативни системи: Било који
Ознаке: db2-zospermissions
Референца: CIS IBM Db2 13 for z/OS Benchmark v1.0.0 - 2.2.1 Ensure that access to the catalog tables in the communications database (CDB) is restricted