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z/OS FDR 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.
c
FDR (Fast Dump Restore) security options are improperly specified.
CM-7 - High - CCI-000381 - V-224718 - SV-224718r1145975_rule
RMF Control
CM-7
Severity
High
CCI
CCI-000381
Version
ZFDR0040
Vuln IDs
  • V-224718
  • V-18014
Rule IDs
  • SV-224718r1145975_rule
  • SV-27074
Product configuration/parameters control the security and operational characteristics of products. If these parameter values are improperly specified, security and operational controls may be weakened. This exposure may threaten the availability of the product applications, and compromise the confidentiality of customer data.
Checks: C-26409r1145973_chk

The following steps are necessary for reviewing the FDR options: Issue the following command on the command line at option 6 in TSO to bring up the FDR ISPF dialog: EXEC 'SYS2.FDR.Vxxxx.CLIST(ABRALLOC)' Select 'I' on the FDR primary panel for INSTALL. Select '4' on the FDR installation options panel to select SETOPT. Verify the FDR Program Library Data Set on this panel specifies the following: Example: 'SYS2A.FDR.Vxxxx.LOADLIB'. Select '1' for SECURITY OPTIONS. Review the setting for ALLCALL Automated Analysis Refer to the following report produced by the z/OS Data Collection: - PDI(ZFDR0040). If ALLCALL is set to YES, this is not a finding.

Fix: F-26397r1145974_fix

The systems programmer will verify that the security option ALLCALL is set to Yes. Execute the FDR ISPF dialog by entering the following on the command line: EXEC 'SYS2.FDR.VXXXX.CLIST(ABRALLOC)' Select 'I' on the FDR PRIMARY OPTIONS MENU for INSTALL. Select '4' on the INSTALLATION OPTIONS MENU to select SETOPT - SET INSTALLATION OPTIONS IN THE FDR GLOBAL OPTIONS TABLE. Verify the FDR program library data set on this panel is set to the current LOADLIB. Example: 'SYS2A.FDR.Vxxxx.LOADLIB'. Select '1' to select SECURITY OPTIONS. On the SET FDR GLOBAL SECURITY OPTIONS, review the ALLCALL setting, ensure it is set to YES.

b
Fast Dump Restore (FDR) install data sets are not properly protected.
CM-5 - Medium - CCI-001499 - V-224719 - SV-224719r1146376_rule
RMF Control
CM-5
Severity
Medium
CCI
CCI-001499
Version
ZFDRT000
Vuln IDs
  • V-224719
  • V-16932
Rule IDs
  • SV-224719r1146376_rule
  • SV-27205
Fast Dump Restore (FDR) install have 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-26410r1145976_chk

Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(FDRRPT). Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZFDR0000). Verify that access to the Fast Dump Restore (FDR) Install 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 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 will be logged.

Fix: F-26398r1146376_fix

The ISSO will ensure that WRITE and/or greater access to Fast Dump Restore (FDR) install data sets is limited to systems programmers only, and all WRITE and/or greater access is logged. All other FDR users can have READ access. 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.FDR SYS2A.FDR The following commands are provided as a sample for implementing data set controls: TSS PERMIT(syspaudt) DSN(SYS2.FDR.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS2.FDR.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<fdrusers>) DSN(SYS2.FDR.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS2A.FDR.) ACCESS(R) TSS PERMIT(syspaudt) DSN(SYS2A.FDR.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<fdrusers>) DSN(SYS2A.FDR.) ACCESS(R)