STIGQter: STIG Summary: IBM z/OS RACF Security Technical Implementation Guide Version: 8 Release: 3 Benchmark Date: 23 Apr 2021:

IBM z/OS DFSMS control data sets must be protected in accordance with security requirements.

DISA Rule

SV-223816r604139_rule

Vulnerability Number

V-223816

Group Title

SRG-OS-000080-GPOS-00048

Rule Version

RACF-SM-000020

Severity

CAT II

CCI(s)

• CCI-000213 - The information system enforces approved authorizations for logical access to information and system resources in accordance with applicable access control policies.

Weight

10

Fix Recommendation

Review the SYS1.PARMLIB(IGDSMS00) data set 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

Configure the RACF data set rules for the SCDS, ACDS, COMMDS, and ACS data sets to restrict WRITE or greater 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.

Some example commands to implement the proper controls are shown here:

AD 'sys3.dfsms.mmd.commds.**' UACC(NONE) OWNER(SYS3) AUDIT(ALL(READ)) DATA('PROTECTED PER ZSMS0020')

PE 'sys3.dfsms.mmd.commds.**' ID(<syspsmpl>) ACC(A)

Check Contents

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 RACF data set rules for the SCDS, ACDS, COMMDS, and ACS data sets restrict WRITE or greater access to only systems programming personnel, this is not a finding.

If the RACF data set rules for the SCDS, ACDS, COMMDS, and ACS data sets do not restrict WRITE or greater 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.

Vulnerability Number

V-223816

Documentable

False

Rule Version

RACF-SM-000020

Severity Override Guidance

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 RACF data set rules for the SCDS, ACDS, COMMDS, and ACS data sets restrict WRITE or greater access to only systems programming personnel, this is not a finding.

If the RACF data set rules for the SCDS, ACDS, COMMDS, and ACS data sets do not restrict WRITE or greater 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 Content Reference

M

Target Key

4101

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