IBM z/OS DFSMS Program Resources must be properly defined and protected.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-224050	TSS0-SM-000020	SV-224050r877888_rule		Medium

Description
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.

Description

To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.

STIG	Date
IBM z/OS TSS Security Technical Implementation Guide	2023-09-19

Details

Check Text ( C-25723r869005_chk )
Refer to the load modules residing in the following Load libraries to determine program resource definitions: v SYS1.DGTLLIB for DFSMSdfp/ISMF v SYS1.DGTLLIB for DFSMSdss/ISMF v SYS1.DFQLLIB for DFSMShsm If the installation moves these modules to another load library the installation-defined load library must be used in the program protection. If the TSS resources are owned or DEFPROT is specified for the resource class, this is not a finding. If the TSS resource access authorizations restrict access to the appropriate personnel, this is not a finding.

Check Text ( C-25723r869005_chk )

Refer to the load modules residing in the following Load libraries to determine program resource definitions:
v SYS1.DGTLLIB for DFSMSdfp/ISMF
v SYS1.DGTLLIB for DFSMSdss/ISMF
v SYS1.DFQLLIB for DFSMShsm

If the installation moves these modules to another load library the installation-defined load library must be used in the program protection.

If the TSS resources are owned or DEFPROT is specified for the resource class, this is not a finding.

If the TSS resource access authorizations restrict access to the appropriate personnel, this is not a finding.

Fix Text (F-25711r869006_fix)
Configure the following to be properly specified in the ACP. Note: The resource type, resources, and/or resource prefixes identified below are examples of a possible installation. The actual resource type, resources, and/or resource prefixes are determined when the product is actually installed on a system through the product's installation guide and can be site specific. Reference the SMS Program Resources as provided by the following libraries: v SYS1.DGTLLIB for DFSMSdfp/ISMF v SYS1.DGTLLIB for DFSMSdss/ISMF v SYS1.DFQLLIB for DFSMShsm If the installation moves these modules to another load library the installation-defined load library must be used in the program protection. The TSS resources as designated in the above are owned and/or DEFPROT is specified for the resource class. The TSS resource access authorizations restrict access to the appropriate personnel as designated in the above. The following commands are provided as a sample for implementing resource controls: Example: TSS ADD(dept-acid) PROGRAM(ACBFUTO2) TSS PERMIT(smplsmpl) PROGRAM(ACBFUTO2) TSS PERMIT(dasdsmpl) PROGRAM(ACBFUTO2) TSS PERMIT(secasmpl) PROGRAM(ACBFUTO2) TSS PERMIT(syspsmpl) PROGRAM(ACBFUTO2) TSS PERMIT(tstcsmpl) PROGRAM(ACBFUTO2)

Fix Text (F-25711r869006_fix)

Configure the following to be properly specified in the ACP.

Note: The resource type, resources, and/or resource prefixes identified below are examples of a possible installation. The actual resource type, resources, and/or resource prefixes are determined when the product is actually installed on a system through the product's installation guide and can be site specific.

Reference the SMS Program Resources as provided by the following libraries:
v SYS1.DGTLLIB for DFSMSdfp/ISMF
v SYS1.DGTLLIB for DFSMSdss/ISMF
v SYS1.DFQLLIB for DFSMShsm

If the installation moves these modules to another load library the installation-defined load library must be used in the program protection.

The TSS resources as designated in the above are owned and/or DEFPROT is specified for the resource class.

The TSS resource access authorizations restrict access to the appropriate personnel as designated in the above.

The following commands are provided as a sample for implementing resource controls:

Example:
TSS ADD(dept-acid) PROGRAM(ACBFUTO2)
TSS PERMIT(smplsmpl) PROGRAM(ACBFUTO2)
TSS PERMIT(dasdsmpl) PROGRAM(ACBFUTO2)
TSS PERMIT(secasmpl) PROGRAM(ACBFUTO2)
TSS PERMIT(syspsmpl) PROGRAM(ACBFUTO2)
TSS PERMIT(tstcsmpl) PROGRAM(ACBFUTO2)