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

CL/SuperSession Install data sets must be properly protected.

DISA Rule

SV-224651r1145869_rule

Vulnerability Number

V-224651

Group Title

SRG-OS-000080

Rule Version

ZCLST000

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

Ensure that WRITE and/or greater access to CL/SuperSession install data sets are limited to systems programmers only, and all WRITE and/or greater access is logged.

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

The following are an example of data sets to be protected:
sys2.omegamon.
sys2.omegamon.*.tlsload
sys2.omegamon.*.tlvload
sys3.omegamon.
sys3.omegamon.rlsload

The following commands are provided as an example for implementing data set controls:
TSS PERMIT(syspaudt) DSN(sys2.omegamon.) ACCESS(r)
TSS PERMIT(syspaudt) DSN(sys2.omegamon.) ACCESS(all) ACTION(audit)
TSS PERMIT(syspaudt) DSN(sys2.omegamon.*.tlsload) ACCESS(r)
TSS PERMIT(syspaudt) DSN(sys2.omegamon.*.tlsload) ACCESS(all) ACTION(audit)
TSS PERMIT(syspaudt) DSN(sys2.omegamon.*.tlvload) ACCESS(r)
TSS PERMIT(syspaudt) DSN(sys2.omegamon.*.tlvload) ACCESS(all) ACTION(audit)
TSS PERMIT(syspaudt) DSN(sys3.omegamon.) ACCESS(r)
TSS PERMIT(syspaudt) DSN(sys3.omegamon.) ACCESS(all) ACTION(audit)
TSS PERMIT(syspaudt) DSN(sys3.omegamon.*.rlsload) ACCESS(r)
TSS PERMIT(syspaudt) DSN(sys3.omegamon.*.rlsload) ACCESS(all) ACTION(audit)

Check Contents

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

- SENSITVE.RPT(KLSRPT).

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

- PDI(ZCLS0000).

Verify that access to the CL/SuperSession Install data sets are properly restricted. If the following guidance is true, this is not a finding.

The TSS data set rules for the data sets restrict WRITE and/or greater access to systems programming personnel.

The TSS data set rules for the data sets specify that all (i.e., failures and successes) WRITE and/or greater access will be logged.

Vulnerability Number

V-224651

Documentable

False

Rule Version

ZCLST000

Severity Override Guidance

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

- SENSITVE.RPT(KLSRPT).

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

- PDI(ZCLS0000).

Verify that access to the CL/SuperSession Install data sets are properly restricted. If the following guidance is true, this is not a finding.

The TSS data set rules for the data sets restrict WRITE and/or greater access to systems programming personnel.

The TSS data set rules for the data sets specify that all (i.e., failures and successes) WRITE and/or greater access will be logged.

Check Content Reference

M

Target Key

4181