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

CL/SuperSession STC datasets must be properly protected.

DISA Rule

SV-224285r1141416_rule

Vulnerability Number

V-224285

Group Title

SRG-OS-000259

Rule Version

ZCLSA001

Severity

CAT II

CCI(s)

• CCI-001499 - Limit privileges to change software resident within software libraries.

Weight

10

Fix Recommendation

Ensure that WRITE and/or greater access to CL/SuperSession STC datasets are limited to systems programmers and CL/SuperSession STC only. READ access can be given to auditors and authorized 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 WRITE and/or greater access for specific datasets, and once documented will work with the ISSO to ensure they are properly restricted to the ACP (Access Control Program) active on the system.

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

The following datasets are an example of datasets to be protected:

SYS3.OMEGAMON.RLSNAF
SYS3.OMEGAMON.RLSNAM
SYS3.OMEGAMON.RLSTDB
SYS3.OMEGAMON.RLSVLOG

The following commands are provided as an example for implementing dataset controls:

$KEY(SYS3)
OMEGAMON.RLSNAF UID(*) R(A) E(A)
OMEGAMON.RLSNAF UID(audtaudt) R(A) E(A)
OMEGAMON.RLSNAF UID(syspaudt) R(A) W(A) A(A) E(A)
OMEGAMON.RLSNAF UID(stc KLS) R(A) W(A) A(A) E(A)
OMEGAMON.RLSNAM UID(*) R(A) E(A)
OMEGAMON.RLSNAM UID(audtaudt) R(A) E(A)
OMEGAMON.RLSNAM UID(syspaudt) R(A) W(A) A(A) E(A)
OMEGAMON.RLSNAM UID(stc KLS) R(A) W(A) A(A) E(A)
OMEGAMON.RLSTDB UID(*) R(A) E(A)
OMEGAMON.RLSTDB UID(audtaudt) R(A) E(A)
OMEGAMON.RLSTDB UID(syspaudt) R(A) W(A) A(A) E(A)
OMEGAMON.RLSTDB UID(stc KLS) R(A) W(A) A(A) E(A)
OMEGAMON.RLSVLOG UID(*) R(A) E(A)
OMEGAMON.RLSVLOG UID(audtaudt) R(A) E(A)
OMEGAMON.RLSVLOG UID(syspaudt) R(A) W(A) A(A) E(A)
OMEGAMON.RLSVLOG UID(stc KLS) R(A) W(A) A(A) E(A)

Check Contents

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

- SENSITVE.RPT(KLSSTC).

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

- PDI(ZCLS0001).

Verify that the accesses to the CL/SuperSession STC datasets are properly restricted. If the following guidance is true, this is not a finding.

The ACF2 dataset access authorizations restrict READ access to auditors and authorized users.

The ACF2 dataset access authorizations restrict WRITE and/or greater access to systems programming personnel.

The ACF2 dataset rules for the datasets restrict WRITE and/or greater access to the product STC(s) and/or batch job(s).

Vulnerability Number

V-224285

Documentable

False

Rule Version

ZCLSA001

Severity Override Guidance

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

- SENSITVE.RPT(KLSSTC).

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

- PDI(ZCLS0001).

Verify that the accesses to the CL/SuperSession STC datasets are properly restricted. If the following guidance is true, this is not a finding.

The ACF2 dataset access authorizations restrict READ access to auditors and authorized users.

The ACF2 dataset access authorizations restrict WRITE and/or greater access to systems programming personnel.

The ACF2 dataset rules for the datasets restrict WRITE and/or greater access to the product STC(s) and/or batch job(s).

Check Content Reference

M

Target Key

4117