Title

Access greater than Read to the System Master Catalog must be limited to system programmers only. (Cat I impact)

Discussion

System catalogs are the basis for locating all files on the system. Unauthorized access could result in the compromise of the operating system environment, ACP, and customer data.

Check Content

a) Refer to the following reports produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(CATMRPT) - Master Catalog Automated Analysis: Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ACP00130) If data set rules for System catalogs allow inappropriate access, this is a finding. 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. Access greater than “READ” for the Master catalog is allowed to a batch job ID in the following specific case: The batch job must reside in a data set that is restricted to systems programmers only. If dataset 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.

Fix Text

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 batch ID access above “READ” only in this specific case: The batch job that requires above “READ” access must reside in a data set that has restricted “ALTER” or equivalent access to systems programmers ONLY. All greater than read access must be logged.

Additional Identifiers

Rule ID: SV-119r4_rule

Vulnerability ID: V-119

Group Title: ACP00130

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.