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z/OS CA VTAPE for TSS Security Technical Implementation Guide - V7R2

  • Version/Release: V7R2
  • Published: 2025-09-28
  • Released: 2025-10-01
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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
CA VTAPE installation data sets are not properly protected.
CM-5 - Medium - CCI-001499 - V-224632 - SV-224632r1146373_rule
RMF Control
CM-5
Severity
Medium
CCI
CCI-001499
Version
ZVTAT000
Vuln IDs
  • V-224632
  • V-16932
Rule IDs
  • SV-224632r1146373_rule
  • SV-33826
CA VTAPE installation data sets have the ability to use privileged functions and/or have access to sensitive data. Failure to properly restrict access to these 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-26315r1146170_chk

Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(VTARPT). Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZVTA0000). Verify that the accesses to the CA VTAPE installation data sets are properly restricted. If the following guidance is true, this is not a finding. The TSS data set rules for the data sets restrict READ access to all authorized users. The TSS data set rules for the data sets restrict WRITE and/or greater access to systems programming personnel. The TSS data set rules for the data sets specify that all (i.e., failures and successes) WRITE and/or greater access are logged.

Fix: F-26303r1146372_fix

The ISSO will ensure that WRITE and/or greater access to CA VTAPE installation data sets is limited to systems programmers only, and all WRITE and/or greater access is logged. READ access can be given to all authorized users. The installing systems programmer will identify and document the product data sets and categorize them according to who will have WRITE and/or greater access and if required that all WRITE and/or greater access is logged. The installing systems programmer will identify if any additional groups have WRITE and/or greater 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: SYS2.VTAPE SYS3.VTAPE (Data sets that are not altered by product STCs; this can be more specific) The following commands are provided as a sample for implementing data set controls: TSS PERMIT(<syspaudt>) DSN(SYS2.VTAPE.) ACCESS(R) TSS PERMIT(<syspaudt>) DSN(SYS2.VTAPE.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<tstcaudt>) DSN(SYS2.VTAPE.) ACCESS(R) TSS PERMIT(<tstcaudt>) DSN(SYS2.VTAPE.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<audtaudt>) DSN(SYS2.VTAPE.) ACCESS(R) TSS PERMIT(authorized users) DSN(SYS2.VTAPE.) ACCESS(R) TSS PERMIT(VTAPE STCs) DSN(SYS2.VTAPE.) ACCESS(R) TSS PERMIT(<syspaudt>) DSN(SYS3.VTAPE.) ACCESS(R) TSS PERMIT(<syspaudt>) DSN(SYS3.VTAPE.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<tstcaudt>) DSN(SYS3.VTAPE.) ACCESS(R) TSS PERMIT(<tstcaudt>) DSN(SYS3.VTAPE.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<audtaudt>) DSN(SYS3.VTAPE.) ACCESS(R) TSS PERMIT(authorized users) DSN(SYS3.VTAPE.) ACCESS(R) TSS PERMIT(VTAPE STCs) DSN(SYS3.VTAPE.) ACCESS(R)

b
CA VTAPE STC data sets will be properly protected.
CM-5 - Medium - CCI-001499 - V-224633 - SV-224633r1146175_rule
RMF Control
CM-5
Severity
Medium
CCI
CCI-001499
Version
ZVTAT001
Vuln IDs
  • V-224633
  • V-17067
Rule IDs
  • SV-224633r1146175_rule
  • SV-33829
CA VTAPE STC data sets have the ability to use privileged functions and/or have access to sensitive data. Failure to properly restrict access to these 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-26316r1146173_chk

Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(VTASTC). Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZVTA0001). Verify that the accesses to the CA VTAPE STC data sets are properly restricted. If the following guidance is true, this is not a finding. The TSS data set rules for the data sets restrict READ access to auditors and authorized users. The TSS data set rules for the data sets restrict WRITE and/or greater access to systems programming personnel and Tape Management personnel. The TSS data set rules for the data sets restrict WRITE and/or greater access to the CA VTAPE's STC(s) and/or batch user(s).

Fix: F-26304r1146174_fix

The ISSO will ensure that WRITE and/or greater access to CA VTAPE STC data sets is limited to systems programmers, Tape Management personnel and/or CA VTAPE's STC(s) and/or batch user(s) only. READ access can be given to auditors and authorized users. The installing systems programmer will identify and document the product data sets and categorize them according to who will have WRITE and/or greater access and if required that all WRITE and/or greater access is logged. The installing systems programmer will identify if any additional groups have WRITE and/or greater 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: SYS3.VTAPE (Data sets that are altered by the product's STCs; this can be more specific) The following commands are provided as a sample for implementing data set controls: TSS PERMIT(<syspaudt>) DSN(SYS3.VTAPE) ACCESS(ALL) TSS PERMIT(<tapeaudt>) DSN(SYS3.VTAPE) ACCESS(ALL) TSS PERMIT(<tstcaudt>) DSN(SYS3.VTAPE) ACCESS(ALL) TSS PERMIT(VTAPE STCs) DSN(SYS3.VTAPE) ACCESS(ALL) TSS PERMIT(<audtaudt>) DSN(SYS3.VTAPE) ACCESS(R) TSS PERMIT(authorize user) DSN(SYS3.VTAPE) ACCESS(R)

b
CA VTAPE Started Task name is not properly identified/defined to the system ACP.
IA-2 - Medium - CCI-000764 - V-224634 - SV-224634r1146178_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
ZVTAT030
Vuln IDs
  • V-224634
  • V-17452
Rule IDs
  • SV-224634r1146178_rule
  • SV-33832
CA VTAPE requires a started task that will be restricted to certain resources, data sets, and other system functions. Defining the started task as a userid to the system ACP allows the ACP to control the access and authorized users that require these capabilities. Failure to properly control these capabilities could compromise the operating system environment, ACP, and customer data.
Checks: C-26317r1146176_chk

Refer to the following report produced by the TSS Data Collection: - TSSCMDS.RPT(@ACIDS). Review each CA VTAPE STC/Batch ACID(s). If the following attributes are defined, this is not a finding. FACILITY(STC, BATCH) PASSWORD(xxxxxxxx,0) SOURCE(INTRDR) NOSUSPEND

Fix: F-26305r1146177_fix

The CA VTAPE systems programmer and the ISSO will ensure that a product's Started Task(s) is properly identified/defined to the system ACP. If the product requires a Started Task, verify that it is properly defined to the system ACP with the proper attributes. Most installation manuals will indicate how the Started Task is identified and any additional attributes that must be specified. A sample is provided here: TSS CREATE(SVTS) TYPE(USER) - NAME('CA VTAPE') DEPT(xxxx) - FAC(STC) - PASS(xxxxxxxx,0) - SOURCE(INTRDR) NOSUSPEND TSS CREATE(SVTSAS) TYPE(USER) - NAME('CA VTAPE') DEPT(xxxx) - FAC(STC) - PASS(xxxxxxxx,0) - SOURCE(INTRDR) NOSUSPEND

b
CA VTAPE Started task(s) must be properly defined to the Started Task Table ACID for Top Secret.
IA-2 - Medium - CCI-000764 - V-224635 - SV-224635r1146181_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
ZVTAT032
Vuln IDs
  • V-224635
  • V-17454
Rule IDs
  • SV-224635r1146181_rule
  • SV-33834
Access to product resources should be restricted to only those individuals responsible for the application connectivity and who have a requirement to access these resources. Improper control of product resources could potentially compromise the operating system, ACP, and customer data.
Checks: C-26318r1146179_chk

Refer to the following report produced by the TSS Data Collection: - TSSCMDS.RPT(#STC). Automated Analysis Refer to the following report produced by the TSS Data Collection: - PDI(ZVTA0032). If the CA VTAPE started task(s) is (are) defined in the TSS STC record, this is not a finding.

Fix: F-26306r1146180_fix

The CA VTAPE systems programmer and the ISSO will ensure that a product's started task(s) is (are) properly identified and/or defined to the system ACP. A unique ACID must be assigned for the CA VTAPE started task(s) through a corresponding STC table entry. The following sample set of commands is shown here as a guideline: TSS ADD(STC) PROCNAME(CVTS) ACID(CVTS) TSS ADD(STC) PROCNAME(CVTSAS) ACID(CVTSAS)