STIGQter: STIG Summary: IBM z/OS TSS Security Technical Implementation Guide Version: 8 Release: 2 Benchmark Date: 23 Apr 2021:

CA-TSS must limit access to the System Master Catalog to appropriate authorized users.

DISA Rule

SV-223904r695470_rule

Vulnerability Number

V-223904

Group Title

SRG-OS-000080-GPOS-00048

Rule Version

TSS0-ES-000310

Severity

CAT I

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.
• CCI-002235 - The information system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

Weight

10

Fix Recommendation

Review access authorization to critical system files.

Evaluate the impact of correcting the deficiency.

Develop a plan of action and implement the changes as required to protect the MASTER CATALOG.

Configure the ESM rules for system catalog to only allow access above "READ" to systems programmers and those authorized by the ISSM/ISSO.

Configure ESM rules for the master catalog to allow access above "READ" to systems programmers ONLY.

Configure ESM rules for the master catalog to allow any Products or procedures system programmer access for system-level maintenance that meet the following specific case:
- The batch job or procedure must be documented in the SITE Security Plan.
- Reside in a data set that is restricted to systems programmers’ access only.

All greater than read access must be logged.

Check Contents

Refer to SYSCATxx member of SYS1.NUCLEUS.

Multiple SYSCATxx members may be defined if so refer to Master Catalog message for IPL.

If the member is not found, refer to the appropriate LOADxx member of SYS1.PARMLIB.

If data set rules for the Master Catalog do not restrict greater than "READ" access to only z/OS systems programming personnel, this is a finding.

If Products or procedures requiring system programmer access for system level maintenance meet the following specific case, this is not a finding:
- The batch job or procedure must be documented in the SITE Security Plan.
- Reside in a data set that is restricted to systems programmers’ access only.

If data set rules for the Master Catalog do not specify that all (i.e., failures and successes) greater than "READ" access will be logged, this is a finding.

Vulnerability Number

V-223904

Documentable

False

Rule Version

TSS0-ES-000310

Severity Override Guidance

Refer to SYSCATxx member of SYS1.NUCLEUS.

Multiple SYSCATxx members may be defined if so refer to Master Catalog message for IPL.

If the member is not found, refer to the appropriate LOADxx member of SYS1.PARMLIB.

If data set rules for the Master Catalog do not restrict greater than "READ" access to only z/OS systems programming personnel, this is a finding.

If Products or procedures requiring system programmer access for system level maintenance meet the following specific case, this is not a finding:
- The batch job or procedure must be documented in the SITE Security Plan.
- Reside in a data set that is restricted to systems programmers’ access only.

If data set rules for the Master Catalog do not specify that all (i.e., failures and successes) greater than "READ" access will be logged, this is a finding.

Check Content Reference

M

Target Key

4102

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