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z/OS TDMF 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
Transparent Data Migration Facility (TDMF) configuration/parameter/option values are not specified properly.
CM-7 - Medium - CCI-000381 - V-225612 - SV-225612r1041449_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
ZTDM0040
Vuln IDs
  • V-225612
  • V-18014
Rule IDs
  • SV-225612r1041449_rule
  • SV-24802
Transparent Data Migration Facility (TDMF) configuration/parameter/option settings control the security and operational characteristics of product. If these setting 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 system and customer data.
Checks: C-27312r1041447_chk

a) Have the products systems programmer display the configuration/parameters control statements used in the current running product to define or enable security. b) Verify the following specifications: Parameter Options: VOLUME SECURITY = YES CHECK TARGET EMPTY = YES Session Options: Volume Security is not available. CHECKTarget|CHKTarget c) If (b) above is true, there is no finding. d) If (b) above is untrue, this is a finding

Fix: F-27300r1041448_fix

The product systems programmer will verify that any configuration/parameters that are required to control the security of the product are properly configured and syntactically correct. See the required parameters below: Parameter Options: VOLUME SECURITY = YES CHECK TARGET EMPTY = YES Session Options: Volume Security is not available. CHECKTarget|CHKTarget NOTE: The ISSO will ensure that volume resource protection is defined to the ACP and access to volumes be given to the appropiate personnel.

b
Transparent Data Migration Facility (TDMF) installation data sets will be not properly protected.
CM-5 - Medium - CCI-001499 - V-225613 - SV-225613r1041452_rule
RMF Control
CM-5
Severity
Medium
CCI
CCI-001499
Version
ZTDMT000
Vuln IDs
  • V-225613
  • V-16932
Rule IDs
  • SV-225613r1041452_rule
  • SV-24783
Transparent Data Migration Facility (TDMF) 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-27313r1041450_chk

Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(TDMFRPT) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZTDM0000) Verify that the accesses to the Transparent Data Migration Facility (TDMF) 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-27301r1041451_fix

The ISSO will ensure that WRITE and/or greater access to Transparent Data Migration Facility (TDMF) installation data sets is limited to systems programmers only, and all WRITE and/or greater access is logged. READ access can be given to auditors. 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 will be: SYS2.TDMF. SYS3.TDMF. The following commands are provided as a sample for implementing data set controls: TSS PERMIT(<syspaudt>) DSN(SYS2.TDMF.) ACCESS(R) TSS PERMIT(<syspaudt>) DSN(SYS2.TDMF.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<tstcaudt>) DSN(SYS2.TDMF.) ACCESS(R) TSS PERMIT(<tstcaudt>) DSN(SYS2.TDMF.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<audtaudt>) DSN(SYS2.TDMF.) ACCESS(R) TSS PERMIT(<syspaudt>) DSN(SYS3.TDMF.) ACCESS(R) TSS PERMIT(<syspaudt>) DSN(SYS3.TDMF.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<tstcaudt>) DSN(SYS3.TDMF.) ACCESS(R) TSS PERMIT(<tstcaudt>) DSN(SYS3.TDMF.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(<audtaudt>) DSN(SYS3.TDMF.) ACCESS(R)