OpenControls Logo

STIG Viewer

STIGViewer Support

IBM z/OS UNIX SUPERUSER resource must be protected in accordance with guidelines.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-223616ACF2-US-000010SV-223616r958472_ruleCCI-000213high
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.
STIGDate
IBM z/OS ACF2 Security Technical Implementation Guide2025-06-24

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (20) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CFG-02Secure Baseline Configurations
1.00
CRY-01Use of Cryptographic Controls
1.00
DCH-01Data Protection
1.00
HRS-02Position Categorization
1.00
HRS-11Separation of Duties (SoD)
1.00
IAC-01Identity & Access Management (IAM)
1.00
IAC-01.2Authenticate, Authorize and Audit (AAA)
1.00
IAC-02Identification & Authentication for Organizational Users
1.00
IAC-03Identification & Authentication for Non-Organizational Users
1.00
IAC-04Identification & Authentication for Devices
1.00

+10 more (top 10 by confidence shown)

NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (93) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-10Concurrent Session Control
1.00
AC-16Security and Privacy Attributes
1.00
AC-17(1)Monitoring and Control
1.00
AC-17(10)Authenticate Remote Commands
1.00
AC-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AC-18(1)Authentication and Encryption
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(10)Shared and Group Account Credential Change
1.00
AC-2(11)Usage Conditions
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00

+83 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.1.1
1.00
3.1.2
1.00
CCI1 mapping
CCI-000213
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (3) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

PR.AA-05
1.00
PR.DS-10
1.00
PR.IR-01
1.00

Who does this work

17 NICE work roles and 9 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-223616r958472_chk)

From the ISPF Command Shell enter: ACF RESOURCE(UNI) LIST LIKE(SUPER-) If the ACF2 rules for the SUPERUSER resource specify a default access of NONE, this is not a finding. If there are no ACF2 rules that allow access to the SUPERUSER resource, this is not a finding. If there is no ACF2 rule for CHOWN.UNRESTRICTED defined, this is not a finding. If the ACF2 rules for each of the SUPERUSER resources listed in the z/OS UNIX System Services Planning, Establishing UNIX Security, specify a default access of NONE, this is not a finding. If the ACF2 rules for each of the SUPERUSER resources listed in the UNIXPRIV CLASS RESOURCES Table in the z/OS UNIX System Services Planning, Establishing UNIX Security, restrict access to appropriate system tasks or systems programming personnel, this is not a finding.

Fix Text (F-25277r504810_fix)

Configure ACF2 SUPERUSER resources for the UNIXPRIV resource class to restrict to appropriate system tasks and/or system programming personnel. Configure the ACF2 rules for the SUPERUSER resource to specify a default access of NONE. Configure no ACF2 rules that allow access to the SUPERUSER resource. Configure no ACF2 rule for CHOWN.UNRESTRICTED defined. Configure the ACF2 rules for each of the SUPERUSER resources listed in the UNIXPRIV CLASS RESOURCES Table in the z/OS UNIX System Services Planning, Establishing UNIX security to specify a default access of NONE. Configure the ACF2 rules for each of the SUPERUSER resources listed in the UNIXPRIV CLASS RESOURCES Table in the z/OS UNIX System Services Planning, Establishing UNIX security to restrict access to appropriate system tasks or systems programming personnel. Example: SET R(UNI) $KEY(SUPERUSER) TYPE(UNI) $MEMBER(SUPRUSER) FILESYS UID(sysprgmr LOG FILESYS.CHOWN UID(sysprgmr) LOG FILESYS.MOUNT UID(sysprog) LOG FILESYS.PFSCTL UID(sysprgmr) LOG FILESYS.VREGISTER UID(sysprgmr) LOG IPC.RMID UID(sysprgmr) LOG PROCESS.GETPSENT UID(sysprgmr) LOG PROCESS.KILL UID(sysprgmr) LOG PROCESS.PTRACE UID(sysprgmr) LOG SETPRIORITY UID(sysprgmr) LOG - UID(*) PREVENT