CA-ACF2 must limit Write and allocate access to the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) to system programmers only.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223465	ACF2-ES-000470	SV-223465r918606_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. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125, SRG-OS-000259-GPOS-00100

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. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125, SRG-OS-000259-GPOS-00100

STIG	Date
IBM z/OS ACF2 Security Technical Implementation Guide	2023-06-16

Details

Check Text ( C-25138r918605_chk )
The ACF2 data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) do not restrict WRITE and/or ALLOCATE access to only z/OS systems programming personnel. The ACF2 data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) allow inappropriate access not documented and approved by the ISSO. If both of the above are untrue, this is not a finding. If either of the above are true, this is a finding.

Check Text ( C-25138r918605_chk )

The ACF2 data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) do not restrict WRITE and/or ALLOCATE access to only z/OS systems programming personnel.

The ACF2 data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) allow inappropriate access not documented and approved by the ISSO.

If both of the above are untrue, this is not a finding.

If either of the above are true, this is a finding.

Fix Text (F-25126r504514_fix)
Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect System-level product installation libraries. Configure allocate access to all system-level product execution libraries to be limited to system programmers only. Access other than this should be documented and approved by the ISSO.

Fix Text (F-25126r504514_fix)

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect System-level product installation libraries.

Configure allocate access to all system-level product execution libraries to be limited to system programmers only.

Access other than this should be documented and approved by the ISSO.