STIGQter: STIG Summary: z/OS HCD for ACF2 Security Technical Implementation Guide Version: 7 Release: 2 Benchmark Date: 01 Oct 2025:

IBM Hardware Configuration Definition (HCD) User datasets are not properly protected.

DISA Rule

SV-224300r1141520_rule

Vulnerability Number

V-224300

Group Title

SRG-OS-000259

Rule Version

ZHCDA002

Severity

CAT II

CCI(s)

• CCI-001499 - Limit privileges to change software resident within software libraries.
• CCI-002234 - Log the execution of privileged functions.

Weight

10

Fix Recommendation

The ISSO will ensure that WRITE and/or greater access to program product user datasets is limited to systems programmers, and all WRITE and/or greater access is logged. Ensure that READ access is limited to auditors, operations personnel, and automated operations users.

The installing systems programmer will identify and document the product datasets, categorize them according to who will have WRITE and/or greater access, and if required, ensure that all WRITE and/or greater access is logged. The installing systems programmer will identify if any additional groups have UPDATE access for specific datasets, and once documented, will work with the ISSO to ensure they are properly restricted to the Access Control Program (ACP) active on the system.

Datasets to be protected will be:
The production IODF datasets (i.e., hhhhhhhh.IODFnn)
The working IODF datasets (i.e., hhhhhhhh.IODFnn)
The activity log for the IODF datasets (i.e., hhhhhhhh.IODFnn.ACTLOG)

Note: Currently on most CSD systems the prefix for these datasets is SYS3.IODF*.**.

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

SET RULE
$KEY(S3I)
$PREFIX(SYS3)
IODF-.- UID(syspaudt) R(A) W(L) A(L) E(A) DATA(DEFAULT SYSPROG)
IODF-.- UID(tstcaudt) R(A) W(L) A(L) E(A)
IODF-.- UID(audtaudt) R(A) E(A) DATA(DEFAULT Auditor)
IODF-.- UID(autoaudt) R(A) E(A)
IODF-.- UID(operaudt) R(A) E(A)

Check Contents

Refer to the following report produced by the dataset and Resource Data Collection:

- SENSITVE.RPT(HCDUSER).

Automated Analysis
Refer to the following report produced by the dataset and Resource Data Collection:

- PDI(ZHCD0002).

Verify that the access to the IBM HCD install datasets is properly restricted. The datasets to be protected are the production and working IODF datasets as well as the activity log for the IODF datasets. If the following guidance is true, this is not a finding.

Note: Currently on most CSD systems the prefix for these datasets is SYS3.IODF*.**.

The ACF2 dataset rules for the datasets restrict WRITE and/or greater access to systems programming personnel.

The ACF2 dataset rules for the datasets restrict READ access to automated operations users and operations personnel.

The ACF2 dataset rules for the datasets do not specify that all (i.e., failures and successes) WRITE and/or greater access will be logged.

Vulnerability Number

V-224300

Documentable

False

Rule Version

ZHCDA002

Severity Override Guidance

Refer to the following report produced by the dataset and Resource Data Collection:

- SENSITVE.RPT(HCDUSER).

Automated Analysis
Refer to the following report produced by the dataset and Resource Data Collection:

- PDI(ZHCD0002).

Verify that the access to the IBM HCD install datasets is properly restricted. The datasets to be protected are the production and working IODF datasets as well as the activity log for the IODF datasets. If the following guidance is true, this is not a finding.

Note: Currently on most CSD systems the prefix for these datasets is SYS3.IODF*.**.

The ACF2 dataset rules for the datasets restrict WRITE and/or greater access to systems programming personnel.

The ACF2 dataset rules for the datasets restrict READ access to automated operations users and operations personnel.

The ACF2 dataset rules for the datasets do not specify that all (i.e., failures and successes) WRITE and/or greater access will be logged.

Check Content Reference

M

Target Key

4121