Update and allocate access to LINKLIST libraries are not limited to system programmers only.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-117	ACP00110	SV-117r2_rule	DCCS-1 DCCS-2 DCSL-1 ECAR-1 ECAR-2 ECAR-3	Medium

Description
The primary function of the LINKLIST is to serve as a single repository for commonly used system modules. Failure to ensure that the proper set of libraries are designated for LINKLIST can impact system integrity, performance, and functionality. For this reason, controls must be employed to ensure that the correct set of LINKLIST libraries are used. Unauthorized access could result in the compromise of the operating system environment, ACP, and customer data.

Description

The primary function of the LINKLIST is to serve as a single repository for commonly used system modules. Failure to ensure that the proper set of libraries are designated for LINKLIST can impact system integrity, performance, and functionality. For this reason, controls must be employed to ensure that the correct set of LINKLIST libraries are used. Unauthorized access could result in the compromise of the operating system environment, ACP, and customer data.

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

Details

Check Text ( C-23114r1_chk )
a) Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(LNKXRPT) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ACP00110) ___ The ACP data set rules for LINKLIST libraries allow inappropriate access. ___ The ACP data set rules for LINKLIST libraries do not restrict UPDATE and/or ALTER access to only z/OS systems programming personnel. ___ The ACP data set rules for LINKLIST libraries do not specify that all (i.e., failures and successes) UPDATE and/or ALTER access will be logged. Note: Any DoD AIS Loadlibs defined to LINKLIST within z/OS Domains will be listed after all system libraraies and will be removed on the test for access to systems programmers in the SRRAUDT check. b) If all of the above are untrue, there is NO FINDING. c) If any of the above is true, this is a FINDING.

Check Text ( C-23114r1_chk )

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

- SENSITVE.RPT(LNKXRPT)

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

- PDI(ACP00110)

___ The ACP data set rules for LINKLIST libraries allow inappropriate access.

___ The ACP data set rules for LINKLIST libraries do not restrict UPDATE and/or ALTER access to only z/OS systems programming personnel.

___ The ACP data set rules for LINKLIST libraries do not specify that all (i.e., failures and successes) UPDATE and/or ALTER access will be logged.

Note: Any DoD AIS Loadlibs defined to LINKLIST within z/OS Domains will be listed after all system libraraies and will be removed on the test for access to systems programmers in the SRRAUDT check.

b) If all of the above are untrue, there is NO FINDING.

c) If any of the above is true, this is a FINDING.

Fix Text (F-17097r1_fix)
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 LINKLIST libraries. The IAO will ensure that update and allocate access to LINKLIST libraries is limited to system programmers only and all update and allocate access is logged.