DFSMS control data sets must be protected in accordance with security requirements.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-3895	ZSMS0020	SV-7358r3_rule		Medium

Description
DFSMS control data sets provide the configuration and operational characteristics of the system-managed storage environment. Failure to properly protect these data sets may result in unauthorized access. This exposure could compromise the availability and integrity of some system services and customer data.

STIG	Date
z/OS TSS STIG	2019-12-12

Details

Check Text ( C-72929r1_chk )
a) Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(SMSRPT) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZSMS0020) b) Review the logical parmlib data sets, example: SYS1.PARMLIB(IGDSMSxx), to identify the fully qualified file names for the following SMS data sets: Source Control Data Set (SCDS) Active Control Data Set (ACDS) Communications Data Set (COMMDS) Automatic Class Selection Routine Source Data Sets (ACS) ACDS Backup COMMDS Backup If the TSS data set rules for the SCDS, ACDS, COMMDS, and ACS data sets restrict UPDATE and ALL access to only systems programming personnel, this is not a finding. If the TSS data set rules for the SCDS, ACDS, COMMDS, and ACS data sets do not restrict UPDATE and ALL access to only systems programming personnel, this is a finding. Note: At the discretion of the ISSM, DASD administrators are allowed UPDATE access to the control datasets.

Check Text ( C-72929r1_chk )

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

- SENSITVE.RPT(SMSRPT)

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

- PDI(ZSMS0020)

b) Review the logical parmlib data sets, example: SYS1.PARMLIB(IGDSMSxx), to identify the fully qualified file names for the following SMS data sets:

Source Control Data Set (SCDS)
Active Control Data Set (ACDS)
Communications Data Set (COMMDS)
Automatic Class Selection Routine Source Data Sets (ACS)
ACDS Backup
COMMDS Backup

If the TSS data set rules for the SCDS, ACDS, COMMDS, and ACS data sets restrict UPDATE and ALL access to only systems programming personnel, this is not a finding.

If the TSS data set rules for the SCDS, ACDS, COMMDS, and ACS data sets do not restrict UPDATE and ALL access to only systems programming personnel, this is a finding.

Note: At the discretion of the ISSM, DASD administrators are allowed UPDATE access to the control datasets.

Fix Text (F-79235r1_fix)
Review the logical parmlib data sets, example: SYS1.PARMLIB(IGDSMSxx), to identify the fully qualified file names for the following SMS data sets: Source Control Data Set (SCDS) Active Control Data Set (ACDS) Communications Data Set (COMMDS) Automatic Class Selection Routine Source Data Sets (ACS) ACDS Backup COMMDS Backup Assign ownership of the data sets, replacing user-id with a user, department, or division that administer access to the SMS control data sets, and data name with the prefix of the SMS control data sets: TSS ADD(user-id) DSN(data name) Ensure the TSS data set rules for the SCDS, ACDS, COMMDS, and ACS data sets restrict UPDATE and ALL access to only z/OS systems programming personnel. Note: At the discretion of the ISSM, DASD administrators are allowed UPDATE access to the control datasets. Permit access to those personnel who manage the SMS environment, replacing user-id with the userid of the user or a Group profile: TSS PERMIT(user-id) DSN(data name) ACC(UPDATE) ACTION(AUDIT) Permit access to those personnel that perform maintenance on these data sets: TSS PERMIT(user-id) DSN(data name) ACC(ALL) ACTION(AUDIT)

Fix Text (F-79235r1_fix)

Review the logical parmlib data sets, example: SYS1.PARMLIB(IGDSMSxx), to identify the fully qualified file names for the following SMS data sets:

Source Control Data Set (SCDS)
Active Control Data Set (ACDS)
Communications Data Set (COMMDS)
Automatic Class Selection Routine Source Data Sets (ACS)
ACDS Backup
COMMDS Backup

Assign ownership of the data sets, replacing user-id with a user, department, or division that administer access to the SMS control data sets, and data name with the prefix of the SMS control data sets:

TSS ADD(user-id) DSN(data name)

Ensure the TSS data set rules for the SCDS, ACDS, COMMDS, and ACS data sets restrict UPDATE and ALL access to only z/OS systems programming personnel.

Note: At the discretion of the ISSM, DASD administrators are allowed UPDATE access to the control datasets.

Permit access to those personnel who manage the SMS environment, replacing user-id with the userid of the user or a Group profile:

TSS PERMIT(user-id) DSN(data name) ACC(UPDATE) ACTION(AUDIT)

Permit access to those personnel that perform maintenance on these data sets:

TSS PERMIT(user-id) DSN(data name) ACC(ALL) ACTION(AUDIT)