The CA-TSS database must be backed up on a scheduled basis.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-224005	TSS0-OS-000090	SV-224005r561402_rule		Medium

Description
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.

Description

Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.

STIG	Date
IBM z/OS TSS Security Technical Implementation Guide	2022-01-05

Details

Check Text ( C-25678r516414_chk )
Refer to the TSS Proclib PARMFILE DD to determine the PARM member. If the BACKUP is missing or coded with blank or OFF this is a finding. Note: If the security data base is shared only one of the systems is required to configure the BACKUP option in the PARMFILE. Determine that the option is properly coded on one of the systems that share the security database. From the ISPF Command Shell enter: TSS MODIFY(Status) If the backup parameter is active with a valid time this is not a finding.

Check Text ( C-25678r516414_chk )

Refer to the TSS Proclib PARMFILE DD to determine the PARM member.

If the BACKUP is missing or coded with blank or OFF this is a finding.

Note: If the security data base is shared only one of the systems is required to configure the BACKUP option in the PARMFILE. Determine that the option is properly coded on one of the systems that share the security database.

From the ISPF Command Shell enter:
TSS MODIFY(Status)

If the backup parameter is active with a valid time this is not a finding.

Fix Text (F-25666r516415_fix)
Configure the TSS PARMLIB BACKUP parameter to include BACKUP statement with a valid time. Additionally, configure the BACKUP parameter in the TSS Parmfile to include BACKUP statement with a valid time for nightly backups.