IBM RACF must limit WRITE or greater access to System backup files to system programmers and/or batch jobs that perform DASD backups.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223670	RACF-ES-000220	SV-223670r604139_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

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

STIG	Date
IBM z/OS RACF Security Technical Implementation Guide	2021-03-30

Details

Check Text ( C-25343r514699_chk )
Collect from the storage management group the identification of the DASD backup files and all associated storage management userids. If ESM data set rules for system DASD backup files do not restrict WRITE or greater access to z/OS systems programming and/or batch jobs that perform DASD backups, this is a finding. If READ Access to system backup data sets is not limited to auditors and others approved by the ISSM, this is a finding.

Check Text ( C-25343r514699_chk )

Collect from the storage management group the identification of the DASD backup files and all associated storage management userids.

If ESM data set rules for system DASD backup files do not restrict WRITE or greater access to z/OS systems programming and/or batch jobs that perform DASD backups, this is a finding.

If READ Access to system backup data sets is not limited to auditors and others approved by the ISSM, this is a finding.

Fix Text (F-25331r514700_fix)
Obtain the high level indexes to backup data sets names define their access to be restricted by the System's ESM to System Programmers and batch jobs that perform the backups. Define READ Access to system backup data sets to be limited to auditors and others approved by the ISSM.