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z/OS NetView for ACF2 Security Technical Implementation Guide

  • Version/Release: V6R9
  • Published: 2022-10-06
  • Released: 2022-11-23
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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
NetView configuration/parameter values must be specified properly.
AC-4 - Medium - CCI-000035 - V-224327 - SV-224327r868218_rule
RMF Control
AC-4
Severity
Medium
CCI
CCI-000035
Version
ZNET0040
Vuln IDs
  • V-224327
  • V-18014
Rule IDs
  • SV-224327r868218_rule
  • SV-28492
NetView 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-26004r868216_chk

Review the member CxxSTYLE in the DSIPARM DD statement concatenation of the NetView CNMPROC STC procedure. Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZNET0040) Ensure that all NetView configuration requirements are specified. If the following guidance is true, this is not a finding. Keyword Value SECOPTS.OPERSEC SAFCHECK|SAFDEF SECOPTS.CMDAUTH SAF.FAIL|SAF.table

Fix: F-25992r868217_fix

The systems programmer and ISSO will review NetView configuration parameters and control options for compliance. To ensure authentication of users to NetView, ensure that CxxSTYLE in the DSIPARM DD statement concatenation of the NetView CNMPROC STC procedure has the following initialization parameter(s) specified: (Note: The data set identified above is an example of a possible installation. The data set is determined when the product is actually installed on a system through the product's installation guide and can be site specific.) SECOPTS.OPERSEC=SAFCHECK|SAFDEF When SECOPTS.OPERSEC=SAFCHECK is used, it specifies that operator identification and password or password phrase checking is performed using an SAF security product. The operator identifier must also be defined in DSIOPF, and other attributes given to the operator at logon are taken from the specified profile for the operator in DSIPRF. Security access checks are checked against the authority of the operator that occur when an operator tries to access a data set that is protected in the DATASET class of an SAF product or an MVS system command that is protected in the OPERCMDS class of an SAF product. When SECOPTS.OPERSEC=SAFDEF is used, it specifies that operator identification and password or password phrase checking is done using an SAF security product. Authority to log on as a NetView operator is controlled through the APPL class. The operator identifier must be authorized to the resource name in the APPL class which represents the NetView program. The attributes given to the operator at logon are defined in the NETVIEW segment of the user profile for the operator in the SAF product. For more information, refer to IBM Tivoli NetView for z/OS Security Reference. When SECOPTS.OPERSEC=SAFDEF is specified, any value for SECOPTS.CMDAUTH can be used. Additional details can be obtained in the IBM Tivoli NetView for z/OS Security Reference. SECOPTS.CMDAUTH=SAF.FAIL|SAF.table When SECOPTS.CMDAUTH=SAF.table is used, table specifies the backup table to be used for immediate commands and when the SAF product cannot make a security decision. This can occur when: ___ No resource name is defined in the NETCMDS class which protects or authorizes this command. ___ The NETCMDS class is not active. ___ The security product is not active. When SECOPTS.CMDAUTH=SAF.FAIL is used, command authority checking will fail if the SAF product can reach no decision. Additional details can be obtained in the IBM Tivoli NetView for z/OS Administration Reference.

b
NetView install data sets are not properly protected.
AC-3 - Medium - CCI-000213 - V-224328 - SV-224328r855183_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
ZNETA000
Vuln IDs
  • V-224328
  • V-16932
Rule IDs
  • SV-224328r855183_rule
  • SV-27308
NetView Install data sets provide the capability 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-26005r520757_chk

a) Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(NETVRPT) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZNET0000) b) Verify that access to the NetView install data sets are properly restricted. ___ The ACF2 data set rules for the data sets does not restrict UPDATE and/or ALTER access to systems programming personnel. ___ The ACF2 data set rules for the datasets does not specify that all (i.e., failures and successes) UPDATE and/or ALTER access will be logged. c) If all of the above are untrue, there is NO FINDING. d) If any of the above is true, this is a FINDING.

Fix: F-25993r520758_fix

The IAO will ensure that update and allocate access to NetView install data sets is limited to System Programmers only, and all update and allocate access is logged. Auditors 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 alter access and if required that all update and allocate access is logged. He will identify if any additional groups have update access for specific data sets, and once documented he will work with the IAO 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.NETVIEW SYS2A.NETVIEW SYS3.NETVIEW The following commands are provided as a sample for implementing dataset controls: $KEY(SYS2) NETVIEW.- UID(syspaudt) R(A) W(L) A(L) E(A) NETVIEW.- UID(audtaudt) R(A) E(A) $KEY(SYS2A) NETVIEW.- UID(syspaudt) R(A) W(L) A(L) E(A) NETVIEW.- UID(audtaudt) R(A) E(A) $KEY(SYS3) NETVIEW.- UID(syspaudt) R(A) W(L) A(L) E(A) NETVIEW.- UID(audtaudt) R(A) E(A)

b
NetView STC data sets are not properly protected.
CM-5 - Medium - CCI-001499 - V-224329 - SV-224329r520762_rule
RMF Control
CM-5
Severity
Medium
CCI
CCI-001499
Version
ZNETA001
Vuln IDs
  • V-224329
  • V-17067
Rule IDs
  • SV-224329r520762_rule
  • SV-27316
NetView STC data sets provide the capability 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-26006r520760_chk

Refer to the following report produced by the Data Set and Resource Data Collection: - SENSITVE.RPT(NETVSTC) Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZNET0001) Verify that acess to the NetView STC data sets are properly restricted. ___ The ACF2 data set rules for the data sets restricts READ access to auditors. ___ The ACF2 data set rules for the data sets restricts UPDATE and/or ALTER access to systems programming personnel. ___ The ACF2 data set rules for the data sets restrictS UPDATE and/or ALTER access to the product STC(s) and/or batch job(s).

Fix: F-25994r520761_fix

The IAO will ensure that update and allocate access to NetView STC data sets are limited to System Programmers and NetView STC only, unless a letter justifying access is filed with the IAO. Auditors 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 alter access and if required that all update and allocate access is logged. He will identify if any additional groups have update and/or alter access for specific data sets, and once documented he will work with the IAO to see that they are properly restricted to the ACP (Access Control Program) active on the system. Data sets to be protected will be: SYS3.NETVIEW.<SYSTEMID>.- (VSAM data sets) The following commands are provided as a sample for implementing dataset controls: SET RULE $KEY(SYS3) NETVIEW.<systemid>.- UID(audtaudt) R(A) E(A) NETVIEW.<systemid>.- UID(cnmproc) R(A) W(A) A(A) E(A) NETVIEW.<systemid>.- UID(syspudt) R(A) W(A) A(A) E(A) NETVIEW.<systemid>.- UID(tstcaudt) R(A) W(A) A(A) E(A) The VSAM dataset required for greater than read access are: SYS3.NETVIEW.<systemid>.AAUVSPL SYS3.NETVIEW.<systemid>.AAUVSSL SYS3.NETVIEW.<systemid>.BNJLGPR SYS3.NETVIEW.<systemid>.BNJLGSE SYS3.NETVIEW.<systemid>.BNJ36PR SYS3.NETVIEW.<systemid>.BNJ36SE SYS3.NETVIEW.<systemid>.DSIKPNL SYS3.NETVIEW.<systemid>.DSILIST SYS3.NETVIEW.<systemid>.DSILOGP SYS3.NETVIEW.<systemid>.DSILOGS SYS3.NETVIEW.<systemid>.DSISVRT SYS3.NETVIEW.<systemid>.DSITRCP SYS3.NETVIEW.<systemid>.DSITRCS SYS3.NETVIEW.<systemid>.SDSIOPEN

b
NetView resources must be properly defined and protected.
AC-4 - Medium - CCI-000035 - V-224330 - SV-224330r868221_rule
RMF Control
AC-4
Severity
Medium
CCI
CCI-000035
Version
ZNETA020
Vuln IDs
  • V-224330
  • V-17947
Rule IDs
  • SV-224330r868221_rule
  • SV-50924
NetView can run with sensitive system privileges, and potentially can circumvent system controls. Failure to properly control access to 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 system programmers only in greater than read authority. Resources are also granted to certain non systems personnel with read only authority.
Checks: C-26007r868219_chk

Refer to the following report produced by the ACF2 Data Collection and Data Set and Resource Data Collection: - SENSITVE.RPT(ZNET0020) - ACF2CMDS.RPT(RESOURCE) - Alternate report Automated Analysis Refer to the following report produced by the Data Set and Resource Data Collection: - PDI(ZNET0020) When SECOPTS.OPERSEC=SAFPW is specified in ZNET0040, this is not applicable. Ensure that all NetView resources and/or generic equivalents are properly protected according to the requirements specified in the NetView Resources table in the z/OS STIG Addendum. If the following guidance is true, this is not a finding. ___ The ACF2 resources are defined with a default access of PREVENT. ___ The ACF2 resource access authorizations restrict access to the appropriate personnel.

Fix: F-25995r868220_fix

The ISSO will work with the systems programmer to verify that the following are properly specified in the ACP. (Note: The resource type, resources, and/or resource prefixes identified below are examples of a possible installation. The actual resource type, resources, and/or resource prefixes are determined when the product is actually installed on a system through the product's installation guide and can be site specific.) When SECOPTS.OPERSEC=SAFPW is specified in ZNET0040, this is not applicable. This can be bypassed. Ensure that all NetView resources and/or generic equivalents are properly protected according to the requirements specified in the NetView Resources table in the z/OS STIG Addendum. Additional details can be obtained in the IBM Tivoli NetView for z/OS Security Reference. Use the NetView Resources table in the z/OS STIG Addendum. This table lists the resources and access requirements for NetView, ensure the following guidelines are followed: The ACF2 resources are defined with a default access of PREVENT. The ACF2 resource access authorizations restrict access to the appropriate personnel. The following commands are provided as a sample for implementing resource controls: $KEY(netid) TYPE(typecode) luname.ADDCMD.- UID(syspaudt) ALLOW - UID(*) PREVENT

b
NetView Started Task name must be properly identified / defined to the system ACP.
IA-2 - Medium - CCI-000764 - V-224331 - SV-224331r520768_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
ZNETA030
Vuln IDs
  • V-224331
  • V-17452
Rule IDs
  • SV-224331r520768_rule
  • SV-28613
NetView requires a started task(s) 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-26008r520766_chk

Refer to the following report produced by the ACF2 Data Collection: - ACF2CMDS.RPT(ATTSTC) If the logonid for the NetView started task(s) includes MUSASS and NO-SMC, there is NO FINDING. If the logonid for the NetView started task(s) is not defined or does not include MUSASS and/or NO-SMC, this is a FINDING.

Fix: F-25996r520767_fix

The NetView system 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. Example: SET LID CHANGE NETVIEW STC MUSASS NO-SMC