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z/OS HCD for TSS Security Technical Implementation Guide

  • Version/Release: V7R1
  • Published: 2025-03-05
  • Released: 2025-04-02
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This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.
b
IBM Hardware Configuration Definition (HCD) install data sets are not properly protected.
CM-5 - Medium - CCI-001499 - V-224726 - SV-224726r1082524_rule
RMF Control
CM-5
Severity
Medium
CCI
CCI-001499
Version
ZHCDT000
Vuln IDs
  • V-224726
  • V-16932
Rule IDs
  • SV-224726r1082524_rule
  • SV-30546
IBM HCD product has the ability to use privileged functions and/or have access to sensitive data. Failure to properly restrict access to their data sets could result in violating the integrity of the base product, which could result in compromising the operating system or sensitive data.
Checks: C-26417r1070266_chk

Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(HCDRPT) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZHCD0000) Verify that access to the IBM Hardware Configuration Definition (HCD) install data sets are properly restricted. The TSS data set rules for the data sets restricts READ access to auditors, automated operations, operators, and systems programming personnel. The TSS data set rules for the data sets restricts UPDATE and/or ALL access to systems programming personnel. The TSS data set rules for the data sets specifies that all (i.e., failures and successes) UPDATE and/or ALL access are logged.

Fix: F-26405r1082524_fix

The ISSO will ensure that update and ALL access to IBM HCD install data sets is limited to system programmers only, and all update and ALL access is logged. Auditors, automated operations, and operators should have READ access. The installing systems programmer will identify and document the product data sets and categorize them according to who will have update and ALL access and if required that all update and ALL access is logged. The installing systems programmer will identify if any additional groups have update and/or ALL access for specific data sets, and once documented, will work with the ISSO to ensure they are properly restricted to the Access Control Program (ACP) active on the system. Data sets to be protected will be: SYS1.SCBD* The following commands are provided as a sample for implementing dataset controls: TSS PERMIT(audtaudt) DSN(SYS1.SCBD) ACCESS(R) TSS PERMIT(autoaudt) DSN(SYS1.SCBD) ACCESS(R) TSS PERMIT(operaudt) DSN(SYS1.SCBD) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS1.SCBD) ACCESS(R) TSS PERMIT(tstcaudt) DSN(SYS1.SCBD) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS1.SCBD) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(tstcpaudt) DSN(SYS1.SCBD) ACCESS(ALL) ACTION(AUDIT)

b
IBM Hardware Configuration Definition (HCD) User data sets are not properly protected.
CM-5 - Medium - CCI-001499 - V-224727 - SV-224727r1082523_rule
RMF Control
CM-5
Severity
Medium
CCI
CCI-001499
Version
ZHCDT002
Vuln IDs
  • V-224727
  • V-21592
Rule IDs
  • SV-224727r1082523_rule
  • SV-30599
IBM HCD product has the capability to use privileged functions and/or to have access to sensitive data. Failure to properly restrict access to their data sets could result in violating the integrity of the base product, which could result in compromising the operating system or sensitive data.
Checks: C-26418r1070269_chk

Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(HCDUSER) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZHCD0002) Verify that the access to the IBM Hardware Configuration Definition (HCD) install data sets is properly restricted. The data sets to be protected are the production and working IODF data sets as well as the activity log for the IODF data sets. Note: Currently on most CSD systems the prefix for these data sets is SYS3.IODF*.**. The TSS data set rules for the data sets does not restrict UPDATE and/or ALL access to systems programming personnel. The TSS data set rules for the data sets does not restrict READ access to automated operations users and operations personnel. The TSS data set rules for the data sets do not specify that all (i.e., failures and successes) UPDATE and/or ALL access will be logged. If all of the above are untrue, this is not a finding.. If any of the above is true, this is a finding.

Fix: F-26406r1082523_fix

The ISSO will ensure that update, and allocate access to program product user data sets is limited to system programmers and all update and allocate access is logged. Ensure that read access is limited to auditors, operations personnel, and automated operations users. The installing systems programmer will identify and document the product data sets and categorize them according to who will have update and alter access and if required that all update and allocate access is logged. The installing systems programmer will identify if any additional groups have update access for specific data sets, and once documented, will work with the ISSO to ensure they are properly restricted to the Access Control Program (ACP) active on the system. Data sets to be protected will be: The production IODF data sets. (i.e. hhhhhhhh.IODFnn) The working IODF data sets. (i.e. hhhhhhhh.IODFnn.) The activity log for the IODF data sets. (i.e. hhhhhhhh.IODFnn.ACTLOG) Note: Currently on most CSD systems the prefix for these data sets is SYS3.IODF*.**. The following commands are provided as a sample for implementing dataset controls: TSS ADD(SYS3) DSN(SYS3) TSS PER(syspaudt) DSN(SYS3.IODF) ACC(R) TSS PER(tstcaudt) DSN(SYS3.IODF) ACC(R) TSS PER(audtaudt) DSN(SYS3.IODF) ACC(R) TSS PER(autoaudt) DSN(SYS3.IODF) ACC(R) TSS PER(operaudt) DSN(SYS3.IODF) ACC(R) TSS PER(syspaudt) DSN(SYS3.IODF) ACC(A) ACTION(AUDIT) TSS PER(tstcaudt) DSN(SYS3.IODF) ACC(A) ACTION(AUDIT)

b
IBM Hardware Configuration Definition (HCD) resources are not properly defined and protected.
AC-3 - Medium - CCI-000213 - V-224728 - SV-224728r1070274_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
ZHCDT020
Vuln IDs
  • V-224728
  • V-17947
Rule IDs
  • SV-224728r1070274_rule
  • SV-30586
Program products can run with sensitive system privileges, and potentially can circumvent system controls. Failure to properly control access to program product resources could result in the compromise of the operating system environment, and compromise the confidentiality of customer data. Many utilities assign resource controls that can be granted to systems programmers only in greater than read authority. Resources are also granted to certain nonsystems personnel with read only authority.
Checks: C-26419r1070272_chk

Refer to the following reports produced by the TSS Data Collection and Data Set and Resource Data Collection: - TSSCMDS.RPT(WHOOIBMF) - SENSITVE.RPT(WHOHIBMF) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZHCD0020) Review the following items for the IBM Hardware Configuration Definition (HCD) resources in the IBMFAC resource class: 1. The TSS owner is defined for the CBD resource and/or IBMFAC RDT entry has DEFPROT specified. 2. There are no TSS rules that allow access to the CBD resource. 3. The TSS rules for the CBD.CPC.IOCDS and CBD.CPC.IPLPARM resources are restricted access to systems programming and operations personnel as well as possibly any automated operations batch users with access of READ. 4. The TSS rules for the CBD.CPC.IOCDS and CBD.CPC.IPLPARM resources are restricted access to systems programming with access of UPDATE and logged. If any item above is untrue, this is a finding. If all items above are true, this is not a finding.

Fix: F-26407r1070273_fix

The systems programmer will work with the ISSO to verify that the following are properly specified in the Access Control Program (ACP). 1. The TSS owner is defined for the CBD resources and/or IBMFAC RDT entry has DEFPROT specified. For example: TSS ADD(dept-acid)IBMFAC(CBD.) TSS REP(RDT)RESCLASS(IBMFAC)ATTR(DEFPROT) 2. There are no TSS rules that allow access to the CBD resource. 3. The RACF rules for the CBD.CPC.IOCDS and CBD.CPC.IPLPARM resources are restricted access to systems programming and operations personnel as well as possibly any automated operations batch users with access of READ. 4. The RACF rules for the CBD.CPC.IOCDS and CBD.CPC.IPLPARM resources are restricted access to systems programming with access of UPDATE and logged. Example: TSS PERMIT(syspaudt)IBMFAC(CBD.CPC.IOCDS)ACCESS(READ) TSS PERMIT(operaudt)IBMFAC(CBD.CPC.IOCDS)ACCESS(READ) TSS PERMIT(autoaudt)IBMFAC(CBD.CPC.IOCDS)ACCESS(READ) TSS PERMIT(syspaudt)IBMFAC(CBD.CPC.IOCDS) - ACCESS(UPDATE)ACTION(AUDIT) TSS PERMIT(syspaudt)IBMFAC(CBD.CPC.IPLPARM)ACCESS(READ) TSS PERMIT(operaudt)IBMFAC(CBD.CPC.IPLPARM)ACCESS(READ) TSS PERMIT(autoaudt)IBMFAC(CBD.CPC.IPLPARM)ACCESS(READ) TSS PERMIT(syspaudt)IBMFAC(CBD.CPC.IPLPARM) - ACCESS(UPDATE)ACTION(AUDIT)