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z/OS CA Common Services for TSS Security Technical Implementation Guide

  • Version/Release: V7R1
  • Published: 2024-12-16
  • Released: 2025-01-30
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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 Common Services installation data sets will be properly protected.
CM-5 - Medium - CCI-001499 - V-224621 - SV-224621r1041395_rule
RMF Control
CM-5
Severity
Medium
CCI
CCI-001499
Version
ZCCST000
Vuln IDs
  • V-224621
  • V-16932
Rule IDs
  • SV-224621r1041395_rule
  • SV-40835
CA Common Services 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-26304r1041393_chk

Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(CCSRPT) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZCCS0000) Verify that the accesses to the CA Common Services 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 restricts READ access to all authorized users. ___ The TSS data set rules for the data sets restricts 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 is logged.

Fix: F-26292r1041394_fix

The ISSO will ensure that WRITE and/or greater access to CA Common Services 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 see that they are properly restricted to the ACP (Access Control Program) active on the system. Data sets to be protected may begin with: SYS2.CCS. SYS2A.CCS. SYS3.CCS. The following commands are provided as a sample for implementing data set controls: TSS ADD(SYS2) DSN(SYS2) TSS PERMIT(syspaudt) DSN(SYS2.CCS) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(syspaudt) DSN(SYS2.CCS) ACCESS(READ) TSS PERMIT(authorized users/ALL) DSN(SYS2.CCS) ACCESS(READ)

b
CA Common Services Started Task name will be properly identified and/or defined to the system ACP.
IA-2 - Medium - CCI-000764 - V-224622 - SV-224622r958482_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
ZCCST030
Vuln IDs
  • V-224622
  • V-17452
Rule IDs
  • SV-224622r958482_rule
  • SV-40858
CA Common Services requires a started task that will be restricted to certain resources, datasets and other system functions. By defining the started task as a userid to the system ACP, It allows the ACP to control the access and authorized users that require these capabilities. Failure to properly control these capabilities, could compromise of the operating system environment, ACP, and customer data.
Checks: C-26305r519590_chk

Refer to the following report produced by the TSS Data Collection: - TSSCMDS.RPT(@ACIDS) Verify that the ACID(s) for the CA Common Services started task(s) is (are) properly defined. If the following attributes are defined, this is not a finding. FACILITY(STC, BATCH) PASSWORD(xxxxxxxx,0) SOURCE(INTRDR)

Fix: F-26293r519591_fix

The IAO working with the systems programmer will ensure the CA Common Services Started Task(s) is properly identified and/or 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 a Started Task is identified and any additional attributes that must be specified. The following commands are provided as a sample for defining Started Task(s): TSS CREATE(CAS9) TYPE(USER) - NAME('STC, CAS9') DEPT(xxxx) - FAC(STC,BATCH) PASS(xxxxxxxx,0) - SOURCE(INTRDR)

b
CA Common Services Started task will be properly defined to the Started Task Table ACID for Top Secret.
IA-2 - Medium - CCI-000764 - V-224623 - SV-224623r958482_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
ZCCST032
Vuln IDs
  • V-224623
  • V-17454
Rule IDs
  • SV-224623r958482_rule
  • SV-40860
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-26306r519593_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(ZCCS0032) If the CA Common Services started task(s) is (are) defined in the TSS STC record, this is not a finding.

Fix: F-26294r519594_fix

The IAO working with the systems programmer will ensure the CA Common Services Started Task(s) is properly identified and/or defined to the System ACP. A unique ACID must be assigned for the CA Common Services started task(s) thru a corresponding STC table entry. The following commands are provided as a sample for defining Started Task(s): TSS ADD(STC) PROCNAME(CAS9) ACID(CAS9)