IBM z/OS TSS Security Technical Implementation Guide

  • Version/Release: V8R12
  • Published: 2023-12-18
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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: [email protected].
b
All IBM z/OS digital certificates in use must have a valid path to a trusted Certification Authority (CA).
IA-5 - Medium - CCI-000185 - V-223871 - SV-223871r877712_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000185
Version
TSS0-CE-000010
Vuln IDs
  • V-223871
  • V-98449
Rule IDs
  • SV-223871r877712_rule
  • SV-107553
Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate not already explicitly trusted. A trust anchor is an authoritative entity represented via a public key and associated data. It is used in the context of public key infrastructures, X.509 digital certificates, and DNSSEC. When there is a chain of trust, usually the top entity to be trusted becomes the trust anchor; it can be, for example, a CA. A certification path starts with the subject certificate and proceeds through a number of intermediate certificates up to a trusted root certificate, typically issued by a trusted CA. This requirement verifies that a certification path to an accepted trust anchor is used for certificate validation and that the path includes status information. Path validation is necessary for a relying party to make an informed trust decision when presented with any certificate not already explicitly trusted. Status information for certification paths includes certificate revocation lists or online certificate status protocol responses. Validation of the certificate status information is out of scope for this requirement. Satisfies: SRG-OS-000066-GPOS-00034, SRG-OS-000403-GPOS-00182
Checks: C-25544r868923_chk

Execute the CA-TSS SAFCRRPT using the following as SYSIN input: RECORDID(-) DETAIL TRUST FIELDS(ISSUER SUBJECT ACTIVE EXPIRE TRUST) If no certificate information is found, this is not a finding. NOTE: Certificates are only valid when their Status is TRUST. Therefore, you may ignore certificates with the NOTRUST status during the following check. If the digital certificate information indicates that the issuer's distinguished name leads to one of the following this is not a finding: a) A DoD PKI Root Certification Authority b) An External Root Certification Authority (ECA) c) An approved External Partner PKI's Root Certification Authority The DoD Cyber Exchange website contains information as to which certificates may be acceptable (https://public.cyber.mil/pki-pke/interoperability/ or https://cyber.mil/pki-pke/interoperability/). Examples of an acceptable DoD CA are: DoD PKI Class 3 Root CA DoD PKI Med Root CA

Fix: F-25532r868924_fix

Remove or replace certificates where the issuer's distinguished name does not lead to a DoD PKI Root Certification Authority; External Root Certification Authority (ECA); or an approved External Partner PKI's Root Certification Authority. The DoD Cyber Exchange website contains information as to which certificates may be acceptable (https://public.cyber.mil/pki-pke/interoperability/ or https://cyber.mil/pki-pke/interoperability/).

b
Expired IBM z/OS digital certificates must not be used.
IA-5 - Medium - CCI-000185 - V-223872 - SV-223872r877713_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000185
Version
TSS0-CE-000020
Vuln IDs
  • V-223872
  • V-98451
Rule IDs
  • SV-223872r877713_rule
  • SV-107555
Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate not already explicitly trusted. A trust anchor is an authoritative entity represented via a public key and associated data. It is used in the context of public key infrastructures, X.509 digital certificates, and DNSSEC. When there is a chain of trust, usually the top entity to be trusted becomes the trust anchor; it can be, for example, a Certification Authority (CA). A certification path starts with the subject certificate and proceeds through a number of intermediate certificates up to a trusted root certificate, typically issued by a trusted CA. This requirement verifies that a certification path to an accepted trust anchor is used for certificate validation and that the path includes status information. Path validation is necessary for a relying party to make an informed trust decision when presented with any certificate not already explicitly trusted. Status information for certification paths includes certificate revocation lists or online certificate status protocol responses. Validation of the certificate status information is out of scope for this requirement.
Checks: C-25545r516015_chk

Execute the CA-TSS SAFCRRPT using the following as SYSIN input: RECORDID(-) DETAIL FIELDS(ISSUER SUBJECT ACTIVE EXPIRE TRUST) If no certificate information is found, this is not a finding. NOTE: Certificates are only valid when their Status is TRUST. Therefore, you may ignore certificates with the NOTRUST status during the following checks. Check the expiration for each certificate with a status of TRUST. If the expiration date has passed, this is a finding.

Fix: F-25533r516016_fix

If the certificate is a user or device certificate with a status of TRUST, follow procedures to obtain a new certificate or re-key certificate. If it is an expired CA certificate remove it.

b
IBM z/OS must have Certificate Name Filtering implemented with appropriate authorization and documentation.
IA-2 - Medium - CCI-000764 - V-223873 - SV-223873r877714_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
TSS0-CE-000030
Vuln IDs
  • V-223873
  • V-98453
Rule IDs
  • SV-223873r877714_rule
  • SV-107557
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25546r516018_chk

If certificate name filtering is in use, the ISSM should document each active filter rule and have written approval to use the rule. Issue the following TSS command to list any certificate name filters defined to TSS: TSS LIST(SDT) CERTMAP(ALL) If there is nothing to list, this is not a finding. NOTE: Certificate name filters are only valid when their Status is TRUST. Therefore, you may ignore filters with the NOTRUST status. If certificate name filters are defined and they have a Status of TRUST, certificate name filtering is in use. If certificate name filtering is in use and filtering rules have been documented and approved by the ISSM, this is not a finding. If certificate name filtering is in use and filtering rules have not been documented and approved by the ISSM, this is a finding.

Fix: F-25534r516019_fix

Ensure any certificate name filtering rules in use are documented and approved by the ISSM.

c
CA-TSS Security control ACIDs must be limited to the administrative authorities authorized and that require these privileges to perform their job duties.
AC-3 - High - CCI-000213 - V-223874 - SV-223874r877715_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000010
Vuln IDs
  • V-223874
  • V-98455
Rule IDs
  • SV-223874r877715_rule
  • SV-107559
The use of security policy filters provides protection for the confidentiality of data by restricting the flow of data. A crucial part of any flow control solution is the ability to configure policy filters. This allows the operating system to enforce multiple and different security policies. Policy filters serve to enact and enforce the organizational policy as it pertains to controlling data flow.
Checks: C-25547r516021_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) DATA(ADMIN, BASIC) If any ACIDs other than TYPE=CENTRAL (SCA/MSCA) has the following administrative authority, this is a finding. FACILITIES(ALL) PROGRAM(ALL) PROGRAM(OWN) RESOURCE(ALL) ROSRES(ALL) VOLUME(ALL) VOLUME(OWN) MISC1(ALL) MISC1(LCF) MISC1(LTIME) MISC1(RDT) MISC1(USER) MISC2(ALL) MISC2(DLF) MISC2(NDT) MISC2(SMS) MISC4(ALL) MISC8(ALL) MISC8(LISTAPLU) MISC8(LISTRDT) MISC8(LISTSDT) MISC8(LISTSTC) MISC8(MCS) MISC9(ALL) MISC9(BYPASS) MISC9(CONSOLE) MISC9(GLOBAL) MISC9(MASTFAC) MISC9(MODE) MISC9(STC) MISC9(TRACE)

Fix: F-25535r868926_fix

Review all security administrator ACIDs. Evaluate the impact of limiting the amount of excessive administrative authorities. Develop a plan of action and implement the changes. The following are examples for other types (DCA, VCA, ZCA, LSCA) that require administrative authorities: (note: these are examples and does not mean everyone should have all of these levels). data set(ALL)ACC(ALL) data set(XAUTH,OWN,REPORT,AUDIT,INFO)ACC(ALL) OTRAN(ALL)ACC(ALL) ACID(ALL) ACID(INFO,MAINTAIN) MISC1(INSTDATA,SUSPEND,TSSSIM,NOATS) MISC2(TSO,TARGET) MISC8(PWMAINT,REMASUSP) MISC9(GENERIC) FACILITY(BATCH, TSO, ROSCOE, CICS, xxxx) Where "xxxx" is a facility the application security team grants access into for their application users. This must not be STC, CA1, DFHSM, or other domain level mastfac/facility. This is only for those "onlines" that users truly log in to for access to their applications/data such as TSO, CICS regions, IDMS, ROSCOE, FTP, etc. TSS ADMIN(acid)RESOURCE(REPORT,INFO,AUDIT) can be allowed and is required to run TSSUTIL reports. Note: "RESOURCE" can specify a more specific Resource Class, such as "OTRAN", "data set", "IDMSGON", "PROGRAM" for non SCA/MSCA type of accounts. These administrators will not have "RESOURCE" specified in administrative authority. Note: "ALL" will display as "*ALL*" but also means approved for any single administrative authority under that specific item.

b
The number of CA-TSS ACIDs possessing the tape Bypass Label Processing (BLP) privilege must be limited.
AC-3 - Medium - CCI-000213 - V-223875 - SV-223875r877716_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000020
Vuln IDs
  • V-223875
  • V-98457
Rule IDs
  • SV-223875r877716_rule
  • SV-107561
The use of security policy filters provides protection for the confidentiality of data by restricting the flow of data. A crucial part of any flow control solution is the ability to configure policy filters. This allows the operating system to enforce multiple and different security policies. Policy filters serve to enact and enforce the organizational policy as it pertains to controlling data flow.
Checks: C-25548r516024_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) DATA(BASIC) If only authorized personnel have BLP access and documentation for access is on file with the ISSO, this is not a finding.

Fix: F-25536r516025_fix

Review all ACIDs with the BLP attribute. Evaluate the impact of removing BLP access from unauthorized personnel. Develop a plan of action and remove BLP access from unauthorized ACIDs.

c
CA-TSS MODE Control Option must be set to FAIL.
AC-2 - High - CCI-000015 - V-223876 - SV-223876r877717_rule
RMF Control
AC-2
Severity
High
CCI
CCI-000015
Version
TSS0-ES-000030
Vuln IDs
  • V-223876
  • V-98459
Rule IDs
  • SV-223876r877717_rule
  • SV-107563
Enterprise environments make account management challenging and complex. A manual process for account management functions adds the risk of a potential oversight or other errors. A comprehensive account management process that includes automation helps to ensure accounts designated as requiring attention are consistently and promptly addressed. Examples include, but are not limited to, using automation to take action on multiple accounts designated as inactive, suspended, or terminated, or by disabling accounts located in non-centralized account stores such as multiple servers. This requirement applies to all account types, including individual/user, shared, group, system, guest/anonymous, emergency, developer/manufacturer/vendor, temporary, and service. The automated mechanisms may reside within the operating system itself or may be offered by other infrastructure providing automated account management capabilities. Automated mechanisms may be composed of differing technologies that, when placed together, contain an overall automated mechanism supporting an organization's automated account management requirements. Account management functions include: assigning group or role membership; identifying account type; specifying user access authorizations (i.e., privileges); account removal, update, or termination; and administrative alerts. The use of automated mechanisms can include, for example: using email or text messaging to automatically notify account managers when users are terminated or transferred; using the information system to monitor account usage; and using automated telephonic notification to report atypical system account usage.
Checks: C-25549r516027_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the global MODE Control Option value is set to "FAIL", this is not a finding. If the global MODE Control Option value is not set to "FAIL", this is a finding. Additional analysis may be required under the following conditions: Mode(IMPL) is allowed while a system is in implementation with a documented process that includes an implementation completion date.

Fix: F-25537r516028_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to set the MODE control option to (FAIL) and proceed with the change.

b
The CA-TSS NPWRTHRESH Control Option must be properly set.
AC-7 - Medium - CCI-000044 - V-223877 - SV-223877r877718_rule
RMF Control
AC-7
Severity
Medium
CCI
CCI-000044
Version
TSS0-ES-000040
Vuln IDs
  • V-223877
  • V-98461
Rule IDs
  • SV-223877r877718_rule
  • SV-107565
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account.
Checks: C-25550r516030_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the NPWRTHRESH Control Option value is not set to NPWRTHRESH(02), this is a finding.

Fix: F-25538r516031_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified following and proceed with the change. NPWRTHRESH(02)

b
The CA-TSS NPPTHRESH Control Option must be properly set.
AC-7 - Medium - CCI-000044 - V-223878 - SV-223878r877719_rule
RMF Control
AC-7
Severity
Medium
CCI
CCI-000044
Version
TSS0-ES-000050
Vuln IDs
  • V-223878
  • V-98463
Rule IDs
  • SV-223878r877719_rule
  • SV-107567
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account.
Checks: C-25551r516033_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the NPPTHRESH Control Option value is not set to NPWRTHRESH(02), this is a finding.

Fix: F-25539r516034_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified following and proceed with the change. NPPTHRESH(02)

b
The CA-TSS PTHRESH Control Option must be set to 2.
AC-7 - Medium - CCI-000044 - V-223879 - SV-223879r877720_rule
RMF Control
AC-7
Severity
Medium
CCI
CCI-000044
Version
TSS0-ES-000060
Vuln IDs
  • V-223879
  • V-98465
Rule IDs
  • SV-223879r877720_rule
  • SV-107569
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account.
Checks: C-25552r516036_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the PTHRESH Control Option value is not set to PTHRESH(02), this is a finding.

Fix: F-25540r516037_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified following and proceed with the change. PTHRESH(02)

b
The CA-TSS NPPTHRESH Control Option must be properly set.
AC-7 - Medium - CCI-000044 - V-223880 - SV-223880r877721_rule
RMF Control
AC-7
Severity
Medium
CCI
CCI-000044
Version
TSS0-ES-000070
Vuln IDs
  • V-223880
  • V-98467
Rule IDs
  • SV-223880r877721_rule
  • SV-107571
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account.
Checks: C-25553r516039_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the PTHRESH Control Option value is not set to NPPTHRESH(02), this is a finding.

Fix: F-25541r516040_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified following and proceed with the change. NPPTHRESH(02)

b
IBM z/OS must limit access for SMF collection files (i.e., SYS1.MANx) to appropriate users and/or batch jobs that perform SMF dump processing.
AU-9 - Medium - CCI-000162 - V-223881 - SV-223881r877722_rule
RMF Control
AU-9
Severity
Medium
CCI
CCI-000162
Version
TSS0-ES-000080
Vuln IDs
  • V-223881
  • V-98469
Rule IDs
  • SV-223881r877722_rule
  • SV-107573
SMF data collection is the system activity journaling facility of the z/OS system. Unauthorized access could result in the compromise of logging and recording of the operating system environment, ESM, and customer data. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfully audit operating system activity. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000256-GPOS-00097, CCI-001494, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099, SRG-OS-000080-GPOS-00048, SRG-OS-000206-GPOS-00084, SRG-OS-000324-GPOS-00125
Checks: C-25554r516755_chk

Refer to the SMFPRMxx member in SYS1.PARMLIB. Determine the SMF and/or Logstream data set name. If the following statements are true, this is not a finding. -The ESM data set rules for the SMF data collection files (e.g., SYS1.MAN* or IFASMF.SYS1.*) restrict ALTER access to only z/OS systems programming personnel. -The ESM data set rules for the SMF data collection files (e.g., SYS1.MAN* or IFASMF.SYS1.*) restrict UPDATE access to z/OS systems programming personnel, and/or batch jobs that perform SMF dump processing and others as approved by ISSM. -The ESM data set rules for the SMF data collection files (e.g., SYS1.MAN* or IFASMF.SYS1.*) restrict READ access to auditors and others approved by the ISSM. -The ESM data set rules for SMF data collection files (e.g., SYS1.MAN* or IFASMF.SYS1.*) specify that all (i.e., failures and successes) UPDATE and/or ALTER access are logged.

Fix: F-25542r516756_fix

Ensure that allocate/alter authority to SMF collection files is limited to only systems programming staff and and/or batch jobs that perform SMF dump processing; access can be granted to others as determined by ISSM. Ensure that read access is limited to auditors. Access may be granted to others as determined by the ISSM. Ensure the accesses are being logged. Ensure that all (i.e., failures and successes) WRITE or greater access are logged. Ensure read access failures are logged.

c
IBM z/OS SYS1.PARMLIB must be properly protected.
AU-12 - High - CCI-000171 - V-223882 - SV-223882r877723_rule
RMF Control
AU-12
Severity
High
CCI
CCI-000171
Version
TSS0-ES-000090
Vuln IDs
  • V-223882
  • V-98471
Rule IDs
  • SV-223882r877723_rule
  • SV-107575
Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Satisfies: SRG-OS-000063-GPOS-00032, SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000362-GPOS-00149, SRG-OS-000337-GPOS-00129, SRG-OS-000324-GPOS-00125
Checks: C-25555r516045_chk

Execute a data set list of access to SYS1.PARMLIB. If the ESM data set rules for SYS1.PARMLIB allow inappropriate (e.g., global READ) access, this is a finding. If data set rules for SYS1.PARMLIB do not restrict READ, WRITE or greater access to only systems programming personnel, this is a finding. If data set rules for SYS1.PARMLIB do not restrict READ and UPDATE access to only domain level security administrators, this is a finding. If data set rules for SYS1.PARMLIB do not restrict READ access to only system Level Started Tasks, authorized Data Center personnel, and auditors, this is a finding. If data set rules for SYS1.PARMLIB do not specify that all (i.e., failures and successes) WRITE or greater access will be logged, this is a finding.

Fix: F-25543r516046_fix

Ensure the accesses are being logged.

b
IBM z/OS for PKI-based authentication must use ICSF or the ESM to store keys.
IA-5 - Medium - CCI-000186 - V-223883 - SV-223883r877725_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000186
Version
TSS0-ES-000100
Vuln IDs
  • V-223883
  • V-98473
Rule IDs
  • SV-223883r877725_rule
  • SV-107577
If the private key is discovered, an attacker can use the key to authenticate as an authorized user and gain access to the network infrastructure. The cornerstone of the PKI is the private key used to encrypt or digitally sign information. If the private key is stolen, this will lead to the compromise of the authentication and non-repudiation gained through PKI because the attacker can use the private key to digitally sign documents and pretend to be the authorized user. Both the holders of a digital certificate and the issuing authority must protect the computers, storage devices, or whatever they use to keep the private keys.
Checks: C-25556r877724_chk

Any keys or Certificates must be managed in ICSF or the external security manager and not in UNIX files. From the ISPF Command Shell enter: OMVS enter find / -name *.kdb and Find / -name *.jks If any files are present, this is a finding. OMVS enter find / -name *.kdb and Find / -name *.jks If any files are present, this is a finding.

Fix: F-25544r811041_fix

Define all Keys/Certificates to ICSF or the security database. Remove all .kdb and .jks key files.

b
The CA-TSS NEWPHRASE and PPSCHAR Control Options must be properly set.
IA-5 - Medium - CCI-000192 - V-223885 - SV-223885r877726_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000192
Version
TSS0-ES-000120
Vuln IDs
  • V-223885
  • V-98477
Rule IDs
  • SV-223885r877726_rule
  • SV-107581
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Satisfies: SRG-OS-000069-GPOS-00037, SRG-OS-000070-GPOS-00038
Checks: C-25558r516054_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the NEWPHRASE Control Option conforms to the following requirements, this is not a finding. MA=1-32 MN=1-32 ID MAX=100 MIN=15-100 MINDAYS=1 NR=0-1 SC=1-32 WARN=1-10 If the PPSCHAR Control Option conform to the allowable list defined in CA Top Secret for z/OS Control Options Guide, this is not a finding. Note: These characters will be specified at a minimum. "40" represents the blank character. Characters can be identified by their character or hex equivalent.

Fix: F-25546r868928_fix

Note: Support of mixed case passwords can only be set when the security file has been copied by TSSXTEND with the option NEWPWBLOCK. Configure the NEWPHRASE Control Option values to the following requirements: MA=1-32 MN=1-32 ID MAX=100 MIN=15-100 MINDAYS=1 NR=0-1 SC=1-32 WARN=1-10 Configure the PPSCHAR Control Option to the allowable list defined in CA Top Secret for z/OS User Guide. Note: These characters will be specified at a minimum. "40" represents the blank character. Characters can be identified by their character or hex equivalent. Example: TSS MODIFY NEWPHRASE(MA=1,MN=1,ID,MAX=100,MIN=15,MINDAYS=1,NR=1,SC=1,WARN=10) TSS MODIFY PPSCHAR(c,c,c,c,...) (Use the allowable list defined in CA Top Secret for z/OS Control Options Guide.)

b
The CA-TSS NEWPW control options must be properly set.
IA-5 - Medium - CCI-000194 - V-223886 - SV-223886r877727_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000194
Version
TSS0-ES-000130
Vuln IDs
  • V-223886
  • V-98479
Rule IDs
  • SV-223886r877727_rule
  • SV-107583
If the private key is stolen, this will lead to the compromise of the authentication and non-repudiation gained through PKI because the attacker can use the private key to digitally sign documents and pretend to be the authorized user. Satisfies: SRG-OS-000071-GPOS-00039, SRG-OS-000072-GPOS-00040, SRG-OS-000075-GPOS-00043, SRG-OS-000480-GPOS-00225, SRG-OS-000266-GPOS-00101, SRG-OS-000279-GPOS-00109
Checks: C-25559r516057_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the NEWPW Control Option values conform to the following requirements, this is not a finding. NEWPW(MIN=8,WARN=10, MINDAYS=1, NR=0, ID, TS, SC, RS, FA, FN, MC, UC, LC) NOTE: For the Option SC, the PASSCHAR control option should be set to the allowable list defined in CA Top Secret for z/OS Control Options Guide. NOTE: For the Option RS, at a minimum use the reserved word prefix list found in the site security plan.

Fix: F-25547r516058_fix

Note: Support of mixed case passwords can only be set when the security file has been copied by TSSXTEND with the option NEWPWBLOCK. Configure the NEWPW Control Option values conform to the following requirements: NEWPW(MIN=8,WARN=10, MINDAYS=1, NR=0, ID, TS, SC, RS, FA, FN, MC, UC, LC) NOTE: For the Option SC, the PASSCHAR control option should be set to the allowable list defined in CA Top Secret for z/OS Control Options Guide. NOTE: For the Option RS, at a minimum use the reserved word prefix list found in the site security plan.

c
IBM z/OS must use NIST FIPS-validated cryptography to protect passwords in the security database.
IA-5 - High - CCI-000196 - V-223887 - SV-223887r877728_rule
RMF Control
IA-5
Severity
High
CCI
CCI-000196
Version
TSS0-ES-000140
Vuln IDs
  • V-223887
  • V-98481
Rule IDs
  • SV-223887r877728_rule
  • SV-107585
Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000074-GPOS-00042
Checks: C-25560r516060_chk

From the ISPF command shell line enter: TSS MODIFY(STATUS) If either of the following is included, this is not a finding. AES_ENCRYPTION(Active,128) AES_ENCRYPTION(Active,256)

Fix: F-25548r516061_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option as specified below: Convert passwords/password phrases from Triple-DES encryption to 128-bit AES or 256-bit encryption by running TSSMAINT (with the AESENCRYPT option specified) and then running TSSXTEND to copy the old security file to the new security file. Please consult CA-TSS Installation guide for more information.

b
The CA-TSS PWEXP Control Option must be set to 60.
IA-5 - Medium - CCI-000199 - V-223888 - SV-223888r877729_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000199
Version
TSS0-ES-000150
Vuln IDs
  • V-223888
  • V-98483
Rule IDs
  • SV-223888r877729_rule
  • SV-107587
Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the operating system does not limit the lifetime of passwords and force users to change their passwords, there is the risk that the operating system passwords could be compromised.
Checks: C-25561r516063_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the PWEXP Control Option value is not set to PWEXP(60), this is a finding.

Fix: F-25549r516064_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the following control option setting as specified and proceed with the change. PWEXP(60)

b
The CA-TSS PPEXP Control Option must be properly set.
IA-5 - Medium - CCI-000199 - V-223889 - SV-223889r877730_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000199
Version
TSS0-ES-000160
Vuln IDs
  • V-223889
  • V-98485
Rule IDs
  • SV-223889r877730_rule
  • SV-107589
Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If the operating system does not limit the lifetime of passwords and force users to change their passwords, there is the risk that the operating system passwords could be compromised.
Checks: C-25562r516066_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the PPEXP Control Option will conform to the following requirements, this is not a finding. PPEXP(60)

Fix: F-25550r516067_fix

Configure the PPEXP Control Option value to conform to the following requirements. PPEXP(60) Example: TSS MODIFY PPEXP(60)

b
The CA-TSS PWHIST Control Option must be set to 10 or greater.
IA-5 - Medium - CCI-000200 - V-223890 - SV-223890r877731_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000200
Version
TSS0-ES-000170
Vuln IDs
  • V-223890
  • V-98487
Rule IDs
  • SV-223890r877731_rule
  • SV-107591
Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements.
Checks: C-25563r516069_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the PWHIST Control Option value is not set to PWHIST(10) or greater, this is a finding.

Fix: F-25551r516070_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the following control option setting as specified and proceed with the change. PWHIST(10) or greater

b
The CA-TSS PPHIST Control Option must be properly set.
IA-5 - Medium - CCI-000200 - V-223891 - SV-223891r877732_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000200
Version
TSS0-ES-000180
Vuln IDs
  • V-223891
  • V-98489
Rule IDs
  • SV-223891r877732_rule
  • SV-107593
Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements.
Checks: C-25564r516072_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the PPHIST Control Option conforms to the following requirements, this is not a finding. PPHIST(10-64)

Fix: F-25552r516073_fix

Configure the PPHIST Control Option value to conforms to the following requirements: PPHIST(10-64) Example: TSS MODIFY PPHIST(10)

b
The IBM z/OS operating system must enforce a minimum eight-character password length.
IA-5 - Medium - CCI-000205 - V-223892 - SV-223892r877733_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000205
Version
TSS0-ES-000190
Vuln IDs
  • V-223892
  • V-98491
Rule IDs
  • SV-223892r877733_rule
  • SV-107595
The shorter the password, the lower the number of possible combinations that need to be tested before the password is compromised. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password length is one factor of several that helps to determine strength and how long it takes to crack a password. Use of more characters in a password helps to exponentially increase the time and/or resources required to compromise the password.
Checks: C-25565r516075_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the NEWPW Control Option values conform to the following requirements, this is not a finding. NEWPW(MIN=8,WARN=10, MINDAYS=1, NR=0, ID, TS, SC, RS, FA, FN, MC, UC, LC) NOTE: For the Option SC, the PASSCHAR control option should be set to the allowable list defined in CA Top Secret for z/OS Control Options Guide. NOTE: For the Option RS, at a minimum use the reserved word prefix list found in the site security plan.

Fix: F-25553r516076_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified and proceed with the change. (Support of mixed case passwords can only be set when the security file has been copied by TSSXTEND with the option NEWPWBLOCK.) Configure the NEWPW Control Option values to conform to the following requirements: NEWPW(MIN=8,WARN=10, MINDAYS=1, NR=0, ID, TS, SC, RS, FA, FN, MC, UC, LC) NOTE: For the Option SC, the PASSCHAR control option should be set to the allowable list defined in CA Top Secret for z/OS Control Options Guide. NOTE: For the Option RS, at a minimum use the reserved word prefix list found in the site security plan.

b
CA-TSS access to SYS1.LINKLIB must be properly protected.
AC-3 - Medium - CCI-000213 - V-223893 - SV-223893r877734_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000200
Vuln IDs
  • V-223893
  • V-98493
Rule IDs
  • SV-223893r877734_rule
  • SV-107597
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000362-GPOS-00149, SRG-OS-000324-GPOS-00125
Checks: C-25566r516078_chk

Execute a data set list of access to SYS1.LINKLIB. If the ESM data set rules for SYS1.LINKLIB allow inappropriate (e.g., global READ) access, this is a finding. If data set rules for SYS1.LINKLIB do not restrict READ, WRITE or greater access to only systems programming personnel, this is a finding. If data set rules for SYS1.LINKLIB do not restrict READ and UPDATE access to only domain level security administrators, this is a finding. If data set rules for SYS1.LINKLIB do not restrict READ access to only system Level Started Tasks, authorized Data Center personnel, and auditors, this is a finding. If data set rules for SYS1.LINKLIB do not specify that all (i.e., failures and successes) WRITE or greater access will be logged, this is a finding.

Fix: F-25554r516079_fix

Configure the ESM rules for SYS1.LINKLIB limit access to system programmers only and all WRITE or greater access is logged.

c
CA-TSS must limit Write or greater access to SYS1.SVCLIB to system programmers only.
AC-3 - High - CCI-000213 - V-223894 - SV-223894r877735_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000210
Vuln IDs
  • V-223894
  • V-98495
Rule IDs
  • SV-223894r877735_rule
  • SV-107599
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25567r516081_chk

Execute a data set list of access for SYS1.SVCLIB. If all of the following are true, this is not a finding. If any of the following are untrue, this is a finding. ESM data set rules for SYS1.SVCLIB restrict WRITE or greater access to only z/OS systems programming personnel. ESM data set rules for SYS1.SVCLIB specify that all (i.e., failures and successes) WRITE or greater access will be logged.

Fix: F-25555r516082_fix

Configure WRITE or greater access to SYS1.SVCLIB to be limited to system programmers only and all WRITE or greater access is logged and reviewed. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes for SYS1.SVCLIB. SYS1.SVCLIB contains SVCs and I/O appendages as such: they are very powerful and will be strictly controlled to avoid compromising system integrity.

c
CA-TSS must limit Write or greater access to SYS1.IMAGELIB to system programmers only.
AC-3 - High - CCI-000213 - V-223895 - SV-223895r877736_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000220
Vuln IDs
  • V-223895
  • V-98497
Rule IDs
  • SV-223895r877736_rule
  • SV-107601
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25568r516084_chk

Execute a data set list of access for SYS1.IMAGELIB. If the following guidance is true, this is not a finding. The ACP data set rules for SYS1.IMAGELIB do not restrict WRITE or greater access to only systems programming personnel. The ACP data set rules for SYS1.IMAGELIB do not specify that all (i.e., failures and successes) WRITE or greater access will be logged.

Fix: F-25556r516085_fix

Configure WRITE or greater access to SYS1.IMAGELIB to be limited to system programmers only and all WRITE or greater access is logged. Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect SYS1.IMAGELIB. SYS1.IMAGELIB is automatically APF-authorized. This data set contains modules, images, tables, and character sets which are essential to system print services.

c
CA-TSS must limit Write or greater access to SYS1.LPALIB to system programmers only.
AC-3 - High - CCI-000213 - V-223896 - SV-223896r877737_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000230
Vuln IDs
  • V-223896
  • V-98499
Rule IDs
  • SV-223896r877737_rule
  • SV-107603
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25569r516087_chk

Execute a data set list of access for SYS1.LPALIB. If all of the following are untrue, this is a finding. If any of the following is true, this is a finding. The ESM data set rules for SYS1.LPALIB do not restrict WRITE or greater access to only z/OS systems programming personnel. The ESM data set rules for SYS1.LPALIB do not specify that all (i.e., failures and successes) WRITE or greater access will be logged.

Fix: F-25557r516088_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to protect SYS1.LPALIB. Configure WRITE or greater access to SYS1.LPALIB to be limited to system programmers only and all WRITE or greater access is logged.

c
CA-TSS must limit WRITE or greater access to all APF-authorized libraries to system programmers only.
AC-3 - High - CCI-000213 - V-223897 - SV-223897r877738_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000240
Vuln IDs
  • V-223897
  • V-98501
Rule IDs
  • SV-223897r877738_rule
  • SV-107605
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25570r516090_chk

From Any ISPF input line, enter TSO ISRDDN APF. If all of the following are untrue, this is not a finding. If any of the following are true, this is a finding. The ACP data set rules for APF libraries do not restrict WRITE or greater access to only z/OS systems programming personnel. The ACP data set rules for APF libraries do not specify that all (i.e., failures and successes) WRITE or greater access will be logged.

Fix: F-25558r516091_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to protect APF Authorized Libraries. Configure WRITE or greater access to all APF-authorized libraries to be limited to system programmers only and all WRITE or greater access is logged.

c
IBM z/OS libraries included in the system REXXLIB concatenation must be properly protected.
AC-3 - High - CCI-000213 - V-223898 - SV-223898r877739_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000250
Vuln IDs
  • V-223898
  • V-98503
Rule IDs
  • SV-223898r877739_rule
  • SV-107607
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25571r516093_chk

Refer to AXRxx member of PARMLIB for each REXXLIB ADD statement. If the ESM data set rules for libraries in the REXXLIB concatenation restrict WRITE or greater access to only z/OS systems programming personnel, this is not a finding. If the ESM data set rules for libraries in the REXXLIB concatenation restrict READ access to the following, this is not a finding. Appropriate Started Tasks Auditors The user-id defined in PARMLIB member AXR00 AXRUSER(user-id) If the ESM data set rules for libraries in the REXXLIB concatenation specify that all (i.e., failures and successes) WRITE or greater access will be logged, this is not a finding.

Fix: F-25559r516094_fix

Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to protect APF Authorized Libraries. Configure ESM data set rules to limit WRITE or greater access to libraries included in the system REXXLIB concatenation to system programmers only. Configure ESM data set rules allow READ access to only appropriate Started Tasks and Auditors. Configure ESM data set rules to log WRITE or greater access (i.e., successes and failures).

c
CA-TSS must limit Write or greater access to all LPA libraries to system programmers only.
AC-3 - High - CCI-000213 - V-223899 - SV-223899r877740_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000260
Vuln IDs
  • V-223899
  • V-98505
Rule IDs
  • SV-223899r877740_rule
  • SV-107609
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25572r516096_chk

From any ISPF input line, enter TSO ISRDDN LPA. If all of the following are untrue, this is not a finding. If any of the following is true, this is a finding. The ACP data set rules for LPA libraries do not restrict WRITE or greater access to only z/OS systems programming personnel. The ACP data set rules for LPA libraries do not specify that all (i.e., failures and successes) WRITE or greater access will be logged.

Fix: F-25560r516097_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to protect LPA Libraries. Configure the WRITE or greater access to all LPA libraries to be limited to system programmers only and all WRITE or greater access is logged.

c
CA-TSS must limit Write or greater access to SYS1.NUCLEUS to system programmers only.
AC-3 - High - CCI-000213 - V-223900 - SV-223900r877741_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000270
Vuln IDs
  • V-223900
  • V-98507
Rule IDs
  • SV-223900r877741_rule
  • SV-107611
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25573r516099_chk

Execute a dataset list of access for SYS1.NUCLEUS. If all of the following are untrue, there is not a finding. If any of the following is true, this is a finding. The ACP data set rules for SYS1.NUCLEUS do not restrict WRITE or greater access to only z/OS systems programming personnel. The ACP data set rules for SYS1.NUCLEUS do not specify that all (i.e., failures and successes) WRITE or greater access will be logged.

Fix: F-25561r516100_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to protect SYS1.NUCLEUS. Configure the WRITE or greater access to SYS1.NUCLEUS to be limited to system programmers only and all WRITE or greater access is logged.

a
CA-TSS must limit Write or greater access to libraries that contain PPT modules to system programmers only.
AC-3 - Low - CCI-000213 - V-223901 - SV-223901r877742_rule
RMF Control
AC-3
Severity
Low
CCI
CCI-000213
Version
TSS0-ES-000280
Vuln IDs
  • V-223901
  • V-98509
Rule IDs
  • SV-223901r877742_rule
  • SV-107613
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25574r516102_chk

Review program entries in the IBM Program Properties Table (PPT). You may use a third-party product to examine these entries however, to determine program entries issue the following command from an ISPF command line: TSO ISRDDN LOAD IEFSDPPT Press Enter. For each module identified in the "eyecatcher" if all of the following are untrue, this is not a finding. If any of the following is true, this is a finding. The ACP data set rules for libraries that contain PPT modules do not restrict WRITE or greater access to only z/OS systems programming personnel. The ACP data set rules for libraries that contain PPT modules do not specify that all WRITE or greater access will be logged.

Fix: F-25562r516103_fix

Configure the WRITE or greater access to libraries containing PPT modules to be limited to system programmers only and all WRITE or greater access is logged.

b
CA-TSS must limit WRITE or greater access to LINKLIST libraries to system programmers only.
AC-3 - Medium - CCI-000213 - V-223902 - SV-223902r877743_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000290
Vuln IDs
  • V-223902
  • V-98511
Rule IDs
  • SV-223902r877743_rule
  • SV-107615
Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileged functions include, for example, establishing accounts, performing system integrity checks, or administering cryptographic key management activities. Non-privileged users are individuals that do not possess appropriate authorizations. Circumventing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25575r516105_chk

From any ISPF input line, enter TSO ISRDDN LINKLIST. If all of the following are untrue, this is not a finding. If any of the following is true, this is a finding. The ACP data set rules for LINKLIST libraries do not restrict WRITE or greater access to only z/OS systems programming personnel. The ACP data set rules for LINKLIST libraries do not specify that all (i.e., failures and successes) WRITE or greater access will be logged.

Fix: F-25563r516106_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect the LINKLIST libraries. Configure the WRITE or greater access to LINKLIST libraries to be limited to system programmers only and all WRITE or greater access is logged.

c
CA-TSS security data sets and/or databases must be properly protected.
AC-3 - High - CCI-000213 - V-223903 - SV-223903r877744_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000300
Vuln IDs
  • V-223903
  • V-98513
Rule IDs
  • SV-223903r877744_rule
  • SV-107617
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000134-GPOS-00068, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25576r516108_chk

Determine all associated ESM security data sets and/or databases. If the following accesses to the ESM security data sets and/or databases are properly restricted as detailed below, this is not a finding. The ESM data set rules for ESM security data sets and/or databases restrict READ access to auditors and DASD batch. The ESM data set rules for ESM security data sets and/or databases restrict READ and/or greater access to z/OS systems programming personnel, security personnel, and/or batch jobs that perform ESM maintenance. All (i.e., failures and successes) data set access authorities (i.e., READ, UPDATE, ALTER, and CONTROL) for ESM security data sets and/or databases are logged.

Fix: F-25564r516109_fix

Review access authorization to critical security database files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to protect the ESM files. Configure READ and/or greater access to all ESM files and/or databases are limited to system programmers and/or security personnel, and/or batch jobs that perform ESM maintenance. READ access can be given to auditors and DASD batch. All accesses to ESM files and/or databases are logged.

c
CA-TSS must limit access to the System Master Catalog to appropriate authorized users.
AC-3 - High - CCI-000213 - V-223904 - SV-223904r877745_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000310
Vuln IDs
  • V-223904
  • V-98515
Rule IDs
  • SV-223904r877745_rule
  • SV-107619
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25577r868930_chk

Refer to SYSCATxx member of SYS1.NUCLEUS. Multiple SYSCATxx members may be defined; if so, refer to Master Catalog message for IPL. If the member is not found, refer to the appropriate LOADxx member of SYS1.PARMLIB. If data set rules for the Master Catalog do not restrict greater than "READ" access to only z/OS systems programming personnel, this is a finding. If products or procedures requiring system programmer access for system-level maintenance meet the following specific case, this is not a finding: - The batch job or procedure must be documented in the SITE Security Plan. - Reside in a data set that is restricted to systems programmers' access only. If data set rules for the Master Catalog do not specify that all (i.e., failures and successes) greater than "READ" access will be logged, this is a finding.

Fix: F-25565r868931_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect the MASTER CATALOG. Configure the ESM rules for system catalog to only allow access above "READ" to systems programmers and those authorized by the ISSM/ISSO. Configure ESM rules for the master catalog to allow access above "READ" to systems programmers ONLY. Configure ESM rules for the master catalog to allow any products or procedures system programmer access for system-level maintenance that meet the following specific case: - The batch job or procedure must be documented in the SITE Security Plan. - Reside in a data set that is restricted to systems programmers' access only. All greater than read access must be logged.

b
CA-TSS allocate access to system user catalogs must be limited to system programmers only.
AC-3 - Medium - CCI-000213 - V-223905 - SV-223905r877746_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000320
Vuln IDs
  • V-223905
  • V-98517
Rule IDs
  • SV-223905r877746_rule
  • SV-107621
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25578r868933_chk

From the ISPF Command Shell enter: LISTCat USERCATALOG ALL NOPREFIX Review the ESM data set rules for each usercatalog defined. If the data set rules for User Catalogs do not restrict ALTER access to only z/OS systems programming personnel, this is a finding. If products or procedures requiring system programmer access for system-level maintenance meet the following specific case, this is not a finding: - The batch job or procedure must be documented in the SITE Security Plan. - Reside in a data set that is restricted to systems programmers' access only. If the data set rules for User Catalogs do not specify that all (i.e., failures and successes) ALTER access will be logged, this a finding. Note: If the USER CATALOGS contain SMS managed data sets, READ access is sufficient to allow user operations. If the USER CATALOGS do not contain SMS managed data sets, UPDATE access is required for user operation.

Fix: F-25566r868934_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect USER CATALOGS. Configure ESM rules for allocate access to USER CATALOGS, limited to system programmers only, and all allocate access is logged. Configure ESM rules for the USER CATALOGS to allow any products or procedures system programmer access for system-level maintenance that meet the following specific case: - The batch job or procedure must be documented in the SITE Security Plan. - Reside in a data set that is restricted to systems programmers' access only. Note: If the USER CATALOGS contain SMS managed data sets, READ access is sufficient to allow user operations. If the USER CATALOGS do not contain SMS managed data sets, UPDATE access is required for user operation.

b
CA-TSS must limit WRITE or greater access to all system-level product installation libraries to system programmers only.
AC-3 - Medium - CCI-000213 - V-223906 - SV-223906r877747_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000330
Vuln IDs
  • V-223906
  • V-98519
Rule IDs
  • SV-223906r877747_rule
  • SV-107623
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25579r516117_chk

Have the systems programmer for z/OS supply the following information: The data set name and associated SREL for each SMP/E CSI utilized to maintain this system. The data set name of all SMP/E TLIBs and DLIBs used for installation and production support. A comprehensive list of the SMP/E DDDEFs for all CSIs may be used if valid. The ACP data set rules for system-level product installation libraries (e.g., SMP/E CSIs) allow inappropriate access. The ACP data set rules for system-level product installation libraries (e.g., SMP/E CSIs) do not restrict WRITE or greater access to only z/OS systems programming personnel. If all of the above are untrue, this is not a finding. If any of the above is true, or if these data sets cannot be identified due to a lack of requested information, this is a finding.

Fix: F-25567r516118_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect System-level product installation libraries. Configure allocate access to all system-level product execution libraries to be limited to system programmers only.

b
CA-TSS must limit WRITE or greater access to the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) to system programmers only.
AC-3 - Medium - CCI-000213 - V-223907 - SV-223907r877748_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000340
Vuln IDs
  • V-223907
  • V-98521
Rule IDs
  • SV-223907r877748_rule
  • SV-107625
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25580r516120_chk

The ESM data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) do not restrict WRITE or greater access to only z/OS systems programming personnel. The ESM data set rules for the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) allow inappropriate access not documented and approved by ISSO. If both of the above are untrue, this is not a finding. If either of the above is true, this is a finding.

Fix: F-25568r516121_fix

Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect JES2 System data sets (spool, checkpoint, and parmlib data sets). Configure WRITE or greater access to JES2 System data sets (spool, checkpoint, and parmlib data sets) to be limited to system programmers only. Access other than this should be documented and approved by the ISSO. (Example: All SYS1.HASP* data sets.)

c
CA-TSS must limit Write or greater access to SYS1.UADS to system programmers only, and Read and Update access must be limited to system programmer personnel and/or security personnel.
AC-3 - High - CCI-000213 - V-223908 - SV-223908r877749_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000350
Vuln IDs
  • V-223908
  • V-98523
Rule IDs
  • SV-223908r877749_rule
  • SV-107627
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25581r516123_chk

The ESM data set rules for SYS1.UADS restricts WRITE or Greater access to only z/OS systems programming personnel. The ESM data set rules for SYS1.UADS restricts READ and/or UPDATE access to z/OS systems programming personnel and/or security personnel. The ESM data set rules for SYS1.UADS specifies that all (i.e., failures and successes) data set access authorities (i.e., READ, UPDATE, ALTER, and CONTROL) will be logged. The ESM data set rules for SYS1.UADS restricts READ access to auditors as documented in Security Plan. If all of the above are untrue, this is not a finding. If any of the above is true, this is a finding.

Fix: F-25569r516124_fix

Evaluate the impact of correcting any deficiency. Develop a plan of action and implement the changes as required to protect SYS1.UADS. SYS1.UADS WRITE or Greater authority is limited to the systems programming staff. Read and update access should be limited to the security staff. READ access is limited to Auditors when included in the site security plan Configure allocate access to SYS1.UADS to be limited to system programmers only, read and update access to SYS1.UADS to be limited to system programmer personnel and/or security personnel and all data set access is logged.

b
CA-TSS must limit access to data sets used to back up and/or dump SMF collection files to appropriate users and/or batch jobs that perform SMF dump processing.
AC-3 - Medium - CCI-000213 - V-223909 - SV-223909r877750_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000360
Vuln IDs
  • V-223909
  • V-98525
Rule IDs
  • SV-223909r877750_rule
  • SV-107629
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000206-GPOS-00084, SRG-OS-000324-GPOS-00125
Checks: C-25582r868936_chk

Obtain the procedures and collection specifics for SMF data sets and backup. If the ESM data set rules for the SMF dump/backup files do not restrict WRITE or greater access to authorized DISA and site personnel (e.g., systems programmers and batch jobs that perform SMF processing), this is a finding. If the ESM data set rules for the SMF dump/backup files do restrict update access as documented in the site security plan, this is a finding. If the ESM data set rules for the SMF dump/backup files do not restrict READ access to auditors and others approved by the ISSM, this is a finding. If the ESM data set rules for SMF dump/backup files do not specify that all (i.e., failures and successes) WRITE or greater access will be logged, this is a finding.

Fix: F-25570r868937_fix

Review access authorization to critical system files. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required to protect data sets used to backup and/or dump SMF Collection Files. Configure data set rules for the SMF dump/backup files to restrict WRITE or greater access to authorized DISA and site personnel (e.g., systems programmers and batch jobs that perform SMF processing). Configure data set rules for the SMF dump/backup files to restrict UPDATE access to others approved the ISSM. Configure data set rules for the SMF dump/backup files to restrict READ access to authorized auditors and others approved by the ISSM. Ensure that all update and alter access authority to SMF history files will be logged using the ESM's facilities.

b
CA-TSS must limit access to SYSTEM DUMP data sets to system programmers only.
AC-3 - Medium - CCI-000213 - V-223910 - SV-223910r877751_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000370
Vuln IDs
  • V-223910
  • V-98527
Rule IDs
  • SV-223910r877751_rule
  • SV-107631
System DUMP data sets are used to record system data areas and virtual storage associated with system task failures. Unauthorized access could result in the compromise of the operating system environment, ACP, and customer data. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25583r516129_chk

Refer to data sets SYS1.DUMPxx, additionally, Dump data sets can be identified by reviewing the logical parmlib concatenation data sets for the current COMMNDxx member. Find the COM= which specifies the DUMPDS NAME (DD NAME=name-pattern) entry. The name-pattern is used to identify additional Dump data sets. If the ESM data set rules for System Dump data sets do not restrict READ, UPDATE, and/or ALTER access to only systems programming personnel, this is a finding. If the ESM data set rules for all System Dump data sets do not restrict READ access to personnel having justification to review these dump data sets, this is a finding.

Fix: F-25571r516130_fix

Configure data set rules for access to SYSTEM DUMP data set(s) to be limited to system programmers only, unless a letter justifying access is filed with the ISSO in the site security plan. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to restrict access to these data sets.

b
CA-TSS WRITE or Greater access to System backup files must be limited to system programmers and/or batch jobs that perform DASD backups.
AC-3 - Medium - CCI-000213 - V-223911 - SV-223911r877752_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000380
Vuln IDs
  • V-223911
  • V-98529
Rule IDs
  • SV-223911r877752_rule
  • SV-107633
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25584r516132_chk

Collect from the storage management group the identification of the DASD backup files and all associated storage management ACIDs. If ESM data set rules for system DASD backup files do not restrict WRITE or greater access to z/OS systems programming and/or batch jobs that perform DASD backups this is a finding. If READ Access to system backup data sets is not limited to auditors and others approved by the ISSM this is a finding.

Fix: F-25572r516133_fix

Obtain the high level indexes to backup data sets names define their access to be restricted by the System's ESM to System Programmers and batch jobs that perform the backups. Define READ Access to system backup data sets to be limited to auditors and others approved by the ISSM.

b
CA-TSS must limit access to SYS(x).TRACE to system programmers only.
AC-3 - Medium - CCI-000213 - V-223912 - SV-223912r877753_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000390
Vuln IDs
  • V-223912
  • V-98531
Rule IDs
  • SV-223912r877753_rule
  • SV-107635
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25585r516135_chk

Execute a dataset list of access for SYS(x).TRACE files. If the ESM data set rule for SYS1.TRACE restricts access to systems programming personnel and started tasks that perform GTF processing, this is not a finding. If the ESM data set rule for SYS1.TRACE restricts access to others as documented and approved by ISSM, this is not a finding.

Fix: F-25573r516136_fix

Configure the ESM access to SYS1.TRACE to be limited to system programmers or started tasks that perform GTF processing. Other user access can be granted as documented and approved by the ISSM.

b
CA-TSS must limit access to System page data sets (i.e., PLPA, COMMON, and LOCALx) to system programmers only.
AC-3 - Medium - CCI-000213 - V-223913 - SV-223913r877754_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000400
Vuln IDs
  • V-223913
  • V-98533
Rule IDs
  • SV-223913r877754_rule
  • SV-107637
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25586r516138_chk

Execute a dataset list of access for System page data sets (i.e., PLPA, COMMON, and LOCALx). If ESM data set rules for system page data sets (PLPA, COMMON, and LOCAL) restrict access to only systems programming personnel, this is not a finding. If ESM data set rules for system page data sets (PLPA, COMMON, and LOCAL) restrict auditors to READ only, this is not a finding.

Fix: F-25574r516139_fix

Configure the ESM data set rules for system page data sets (PLPA, COMMON, and LOCAL) to restrict access to only systems programming personnel. Auditors may be allowed READ Access as approved by the ISSM.

c
CA-TSS must limit WRITE or greater access to libraries containing EXIT modules to system programmers only.
AC-3 - High - CCI-000213 - V-223914 - SV-223914r877755_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000410
Vuln IDs
  • V-223914
  • V-98535
Rule IDs
  • SV-223914r877755_rule
  • SV-107639
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000259-GPOS-00100, SRG-OS-000324-GPOS-00125
Checks: C-25587r868939_chk

Examine the system for active exit modules. You may need the system administrator's help for this. There are third-party software products that can determine standard and dynamic exits loaded in the system. If all the exits are found within APF, LPA, and LINKLIST, this is not applicable. If ESM data set rules for libraries that contain system exit modules restrict WRITE or greater access to only z/OS systems programming personnel, this is not a finding. If the ESM data set rules for libraries that contain exit modules specify that all WRITE or greater access will be logged, this is not a finding.

Fix: F-25575r868940_fix

Using the ESM, protect the data sets associated with all product exits installed in the z/OS environment. This reduces the potential of a hacker adding a routine to a library and possibly creating an exposure. Confirm that all exits are tracked using a CMP. Develop usermods to include the source/object code used to support the exits. Have systems programming personnel review all z/OS and other product exits to confirm that the exits are required and are correctly installed. Configure ESM data set rules for all WRITE or greater access to libraries containing z/OS and other system-level exits will be logged using the ACP's facilities. Only systems programming personnel will be authorized to update the libraries containing z/OS and other system level exits.

c
CA-TSS must limit all system PROCLIB data sets to system programmers only and appropriate authorized users.
AC-3 - High - CCI-000213 - V-223915 - SV-223915r877756_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000420
Vuln IDs
  • V-223915
  • V-98537
Rule IDs
  • SV-223915r877756_rule
  • SV-107641
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000080-GPOS-00048
Checks: C-25588r868942_chk

Refer to the following for the PROCLIB data sets that contain the STCs and TSO logons from the following sources: -MSTJCLxx member used during an IPL. The PROCLIB data sets are obtained from the IEFPDSI and IEFJOBS DD statements. -PROCxx DD statements and JES2 Dynamic PROCLIBs. Where 'xx' is the PROCLIB entries for the STC and TSU JOBCLASS configuration definitions. Verify that the accesses to the above PROCLIB data sets are properly restricted. If the following guidance is true, this is not a finding. If the ESM data set access authorizations restrict READ access to all authorized users, this is not a finding. If the ESM data set access authorizations restrict WRITE and/or greater access to systems programming personnel, this is not a finding.

Fix: F-25576r868943_fix

Configure ESM data set rules to restrict all WRITE and/or greater access to all PROCLIBs referenced in the Master JCL and JES2 or JES3 procedure for started tasks (STCs) and TSO logons to systems programming personnel only. Suggestion on how to update system to be compliant with this vulnerability: NOTE: All examples are only examples and may not reflect your operating environment. Obtain only the PROCLIB data sets that contain STC and TSO procedures. The data sets to be reviewed are obtained using the following steps: -All data sets contained in the MSTJCLxx member in the DD statement concatenation for IEFPDSI and IEFJOBS. -The data set in the PROCxx DD statement concatenation that are within the JES2 procedure or identified in the JES2 dynamic PROCLIB definitions. The specific PROCxx DD statement that is used is obtained from the PROCLIB entry for the JOBCLASSes of STC and TSU. The following are the data sets the process will obtain for analysis: MSTJCL00 //MSTJCL00 JOB MSGLEVEL=(1,1),TIME=1440 //EXEC PGM=IEEMB860,DPRTY=(15,15) //STCINRDR DD SYSOUT=(A,INTRDR) //TSOINRDR DD SYSOUT=(A,INTRDR) //IEFPDSI DD DSN=SYS3.PROCLIB,DISP=SHR <<=== //DD DSN=SYS2.PROCLIB,DISP=SHR <<=== //DD DSN=SYS1.PROCLIB,DISP=SHR <<=== //SYSUADS DD DSN=SYS1.UADS,DISP=SHR //SYSLBC DD DSN=SYS1.BRODCAST,DISP=SHR JES2 //JES2 PROC //IEFPROC EXEC PGM=HASJES20,PARM=NOREQ, //DPRTY=(15,15),TIME=1440,PERFORM=9 //ALTPARM DD DISP=SHR, //DSN=SYS1.PARMLIB(JES2BKUP) //HASPPARM DD DISP=SHR, //DSN=SYS1.PARMLIB(JES2PARM) //PROC00 DD DSN=SYS3.PROCLIB,DISP=SHR <<=== //DD DSN=SYS2.PROCLIB,DISP=SHR <<=== //DD DSN=SYS1.PROCLIB,DISP=SHR <<=== //PROC01 DD DSN=SYS4.USERPROC,DISP=SHR //DD DSN=SYS3.PROCLIB,DISP=SHR //DD DSN=SYS2.PROCLIB,DISP=SHR //DD DSN=SYS1.PROCLIB,DISP=SHR //IEFRDER DD SYSOUT=* //HASPLIST DD DDNAME=IEFRDER JES2 initialization parameter JOBCLASS PROCLIB entries JOBCLASS(*) ACCT=NO, /* ACCT # NOT REQUIRED (DEF.)*/ ... PROCLIB=01, /* DEFAULT TO //PROC01 DD (DEF.)*/ ... JOBCLASS(STC) AUTH=ALL, /* ALLOW ALL COMMANDS (DEF.)*/ ... PROCLIB=00, /* USE //PROC00 DD (DEF.)*/ ... JOBCLASS(TSU) AUTH=ALL, /* ALLOW ALL COMMANDS (DEF.)*/ ... PROCLIB=00, /* USE //PROC00 DD (DEF.)*/ ... PROCLIB data set that will be used in the access authorization process: SYS3.PROCLIB SYS2.PROCLIB SYS1.PROCLIB The following PROCLIB data set will NOT be used or evaluated: SYS4.USERPROC Recommendation for sites: The following are recommendations for the sites to ensure only PROCLIB data sets that contain the STC and TSO procedures are protected. -Remove all application PROCLIB data sets from MSTJCLxx and JES2 procedures. The customer will have all JCL changed to use the JCLLIB JCL statement to refer to the application PROCLIB data sets. Example: //USERPROC JCLLIB ORDER=(SYS4.USERPROC) -Remove all access to the application PROCLIB data sets and only authorize system programming personnel WRITE and/or greater access to these data sets. -Document the application PROCLIB data set access for the customers that require WRITE and/or greater access. Use this documentation as justification for the inappropriate access created by the scripts. -Change MSTJCLxx and JES2 procedure to identify STC and TSO PROCLIB data sets separate from application PROCLIB data sets. The following is a list of actions that can be performed to accomplish this recommendation: a. Ensure that MSTJCLxx contains only PROCLIB data sets that contain STC and TSO procedures. b. If an application PROCLIB data set is required for JES2, ensure that the JES2 procedure specifies more than one PROCxx DD statement concatenation or identified in the JES2 dynamic PROCLIB definitions. Identify one PROCxx DD statement data set concatenation that contains the STC and TSO PROCLIB data sets. Identify one or more additional PROCxx DD statements that can contain any other PROCLIB data sets. The concatenation of the additional PROCxx DD statements can contain the same data sets that are identified in the PROCxx DD statement for STC and TSO. The following is an example of the JES2 procedure: //JES2 PROC //IEFPROC EXEC PGM=HASJES20,PARM=NOREQ, //DPRTY=(15,15),TIME=1440,PERFORM=9 //ALTPARM DD DISP=SHR, //DSN=SYS1.PARMLIB(JES2BKUP) //HASPPARM DD DISP=SHR, //DSN=SYS1.PARMLIB(JES2PARM) //PROC00 DD DSN=SYS3.PROCLIB,DISP=SHR //DD DSN=SYS2.PROCLIB,DISP=SHR //DD DSN=SYS1.PROCLIB,DISP=SHR //PROC01 DD DSN=SYS4.USERPROC,DISP=SHR //DD DSN=SYS3.PROCLIB,DISP=SHR //DD DSN=SYS2.PROCLIB,DISP=SHR //DD DSN=SYS1.PROCLIB,DISP=SHR //IEFRDER DD SYSOUT=* //HASPLIST DD DDNAME=IEFRDER c. Ensure that the JES2 configuration file is changed to specify that the PROCLIB entry for the STC and TSU JOBCLASSes point to the proper PROCxx entry within the JES2 procedure or JES2 dynamic PROCLIB definitions that contain the STC and/or TSO procedures. All other JOBCLASSes can specify a PROCLIB entry that uses the same PROCxx or any other PROCxx DD statement identified in the JES2 procedure or identified in the JES2 dynamic PROCLIB definitions. The following is an example of the JES2 initialization parameters: JOBCLASS(*) ACCT=NO, /* ACCT # NOT REQUIRED (DEF.)*/ ... PROCLIB=01, /* DEFAULT TO //PROC01 DD (DEF.)*/ ... JOBCLASS(STC) AUTH=ALL, /* ALLOW ALL COMMANDS (DEF.)*/ ... PROCLIB=00, /* USE //PROC00 DD (DEF.)*/ ... JOBCLASS(TSU) AUTH=ALL, /* ALLOW ALL COMMANDS (DEF.)*/ ... PROCLIB=00, /* USE //PROC00 DD (DEF.)*/ ... d. Ensure that only system programming personnel are authorized WRITE and/or greater access to PROCLIB data sets that contain STC and TSO procedures.

b
CA-TSS must protect memory and privileged program dumps in accordance with proper security requirements.
AC-3 - Medium - CCI-000213 - V-223916 - SV-223916r877757_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000430
Vuln IDs
  • V-223916
  • V-98539
Rule IDs
  • SV-223916r877757_rule
  • SV-107643
Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25589r516147_chk

If the IEAABD. resource and/or generic equivalent is defined with no access and all access logged, this is not a finding. If the IEAABD.DMPAUTH. resource and/or generic equivalent is defined with READ access limited to authorized users, this is not a finding. If the IEAABD.DMPAUTH. resource and/or generic equivalent UPDATE or greater access is restricted to only systems personnel and all access is logged, this is not a finding. If the IEAABD.DMPAKEY resource and/or generic equivalent is defined and all access is restricted to systems personnel and that all access is logged, this is not a finding.

Fix: F-25577r868945_fix

Memory and privileged program dump resources are provided via resources in the FACILITY resource class. Ensure that the following are properly specified in the ESM. (Note: The resources and/or resource prefixes identified below are examples of a possible installation. The actual 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.) Below is listed the access requirements for memory and privileged program dump resources. Ensure the guidelines for the resource type, resources, and/or generic equivalent are followed. When protecting the facilities for dumps lists via the FACILITY resource class, ensure that the following items are in effect: IEAABD. IEAABD.DMPAUTH. IEAABD.DMPAKEY. The RACF resource rules for the resources specify UACC(NONE) and NOWARNING. Ensure that no access is given to IEAABD. resource. Example RDEF FACILITY IEAABD.** UACC(NONE) OWNER(owner group) AUDIT(ALL(READ)) IEAABD.DMPAUTH. READ access is limited to authorized users that have a valid job duties requirement for access. UPDATE access will be restricted to system programming personnel and access will be logged. Example: RDEF FACILITY IEAABD.DMPAUTH.** UACC(NONE) OWNER(owner group) AUDIT(ALL(UPDATE)) PERMIT IEAABD.DMPAUTH.** CLASS(FACILITY) ID(authusers) ACCESS(READ) PERMIT IEAABD.DMPAUTH.** CLASS(FACILITY) ID(syspsmpl) ACCESS(UPDATE) IEAABD.DMPAKEY. access will be restricted to system programming personnel and access will be logged. Example: RDEF FACILITY IEAABD.DMPAKEY.** UACC(NONE) OWNER(owner group) AUDIT(ALL(READ)) PERMIT IEAABD.DMPAKEY.** CLASS(FACILITY) ID(syspsmpl) ACCESS(READ)

c
IBM z/OS must protect dynamic lists in accordance with proper security requirements.
AC-3 - High - CCI-000213 - V-223917 - SV-223917r877758_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000440
Vuln IDs
  • V-223917
  • V-98541
Rule IDs
  • SV-223917r877758_rule
  • SV-107645
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25590r516150_chk

Refer to the CSV-prefixed resources defined below: CSVAPF. CSVAPF.MVS.SETPROG.FORMAT.DYNAMIC CSVAPF.MVS.SETPROG.FORMAT.STATIC CSVDYLPA. CSVDYNEX. CSVDYNEX.LIST CSVDYNL. CSVDYNL.UPDATE.LNKLST CSVLLA. If the TSS IBMFAC resource class in the RDT has the DEFPROT attribute specified and/or the CSV resources and/or generic equivalent are owned this is not a finding. If the TSS resources and/or generic equivalent identified above are defined with ACTION(AUDIT) and UPDATE access restricted to system programming personnel this is not a finding. If the TSS CSVDYNEX.LIST resource and/or generic equivalent is defined with ACTION(AUDIT) and UPDATE access restricted to system programming personnel this is a finding. If the TSS CSVDYNEX.LIST resource and/or generic equivalent are defined with READ access restricted to auditors this is not a finding. If the products CICS and/or CONTROL-O are on the system, and the TSS access to the CSVLLA resource access to the CSVLLA resource and/or generic equivalent are defined with ACTION(AUDIT) and UPDATE access restricted to the CICS and CONTROL-O STC ACIDs this is not a finding. If any software product requires access to dynamic LPA updates on the system, the TSS access to the CSVDYLPA resource and/or generic equivalent will be defined with ACTION(AUDIT) and UPDATE only after the product has been validated with the appropriate STIG or SRG for compliance AND receives documented and filed authorization that details the need and any accepted risks from the site ISSM or equivalent security authority. Note: In the above, UPDATE access can be substituted with ALL or CONTROL. Review the permissions in the TSS documentation when specifying UPDATE.

Fix: F-25578r516151_fix

Configure TSS to ensure that the Dynamic List resources are defined to the IBMFAC resource class and protected. Only system programmers and a limited number of authorized users and Approved authorized Started Tasks are able to issue these commands. All access is logged. The required CSV-prefixed Facility Class resources are listed below. These resources or generic equivalents should be defined and permitted as required with only z/OS systems programmers and logging enabled. Minimum required list of CSV-prefixed resources: CSVAPF. CSVAPF.MVS.SETPROG.FORMAT.DYNAMIC CSVAPF.MVS.SETPROG.FORMAT.STATIC CSVDYLPA. CSVDYLPA.ADD. CSVDYLPA.ADD. CSVDYNEX. CSVDYNEX.LIST CSVDYNL. CSVDYNL.UPDATE.LNKLST CSVLLA. If DEFPROT is specified in the IBMFAC RDT the following command examples are not required. To prevent access to these resources, the CSV resources are protected using the following commands. The following commands are provided for example only: TSS ADDTO(deptacid) IBMFAC(CSV) or TSS ADDTO(deptacid) IBMFAC(CSVAPF) TSS ADDTO(deptacid) IBMFAC(CSVDYLPA) TSS ADDTO(deptacid) IBMFAC(CSVDYNEX) TSS ADDTO(deptacid) IBMFAC(CSVDYNL) TSS ADDTO(deptacid) IBMFAC(CSVDYLPA) TSS ADDTO(deptacid) IBMFAC(CSVLLA) Limit authority to those resources to z/OS systems programmers. Restrict to the absolute minimum number of personnel with ACTION(AUDIT) and UPDATE access. Sample commands are shown here to accomplish this: TSS PERMIT(syspsmpl) IBMFAC(CSVAPF.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(syspsmpl) IBMFAC(CSVAPF.MVS.SETPROG) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(syspsmpl) IBMFAC(CSVAPF.MVS.SETPROG.FORMAT) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(syspsmpl) IBMFAC(CSVAPF.MVS.SETPROG.SETPROG.FORMAT.DYNAMIC) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(syspsmpl) IBMFAC(CSVAPF.MVS.SETPROG.SETPROG.FORMAT.STATIC) ACCESS(UPDATE) ACTION(AUDIT) The CSVDYLPA.ADD resource will be permitted to BMC Mainview, CA 1, and CA Common Services STC ACIDs with ACTION(AUDIT) and UPDATE access. The CSVDYLPA resource will be permitted to BMC Mainview, CA 1, and CA Common Services STC ACIDs with ACTION(AUDIT) and UPDATE access. Sample commands are shown here to accomplish one set of resources: TSS PERMIT(syspsmpl) IBMFAC(CSVDYLPA.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(BMC Mainview STC ACID) IBMFAC(CSVDYLPA.ADD.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(CA 1 STC ACID) IBMFAC(CSVDYLPA.ADD.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(CCS STC ACID) IBMFAC(CSVDYLPA.ADD.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(CA 1 STC ACID) IBMFAC(CSVDYLPA.DELETE.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(CCS STC ACID) IBMFAC(CSVDYLPA.DELETE.) ACCESS(UPDATE) ACTION(AUDIT) The CSVDYNEX.LIST resource and/or generic equivalent will be defined with ACTION(AUDIT) and UPDATE access restricted to system programming personnel. The CSVDYNEX.LIST resource and/or generic equivalent will be defined with READ access restricted to auditors. Sample commands are shown here to accomplish this: TSS PERMIT(syspsmpl) IBMFAC(CSVDYNEX.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(syspsmpl) IBMFAC(CSVDYNEX.LIST) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(smplsmpl) IBMFAC(CSVDYNEX.LIST) ACCESS(READ) The CSVLLA resource will be permitted to CICS and CONTROL-O STC ACIDs with ACTION(AUDIT) and UPDATE access. Sample commands are shown here to accomplish one set of resources: TSS PERMIT(syspsmpl) IBMFAC(CSVLLA.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(CICS STC ACIDs) IBMFAC(CSVLLA.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(CONTROL-O STC ACID) IBMFAC(CSVLLA.) ACCESS(UPDATE) ACTION(AUDIT)

b
IBM z/OS system commands must be properly protected.
AC-3 - Medium - CCI-000213 - V-223918 - SV-223918r877759_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000450
Vuln IDs
  • V-223918
  • V-98543
Rule IDs
  • SV-223918r877759_rule
  • SV-107647
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25591r516153_chk

From a command screen enter: TSS WHOHAS OPERCMDS(MVS) If any of below is untrue for any z/OS system command resource, this is a finding. Access to MVS resource of the OPERCMDS class is restricted to a limited number of authorized users, and all access logged. Access to "MVS.**" is not allowed. Access to z/OS system commands as defined in the table entitled MVS commands, RACF access authorities, and resource names, in the IBM z/OS MVS System Commands manual, is restricted to the appropriate personnel (e.g., operations staff, systems programming personnel, general users). NOTE: Use the GROUP category specified in the table referenced above as a guideline to determine appropriate personnel access to system commands. NOTE: The (MVS.SEND) Command will not be a finding if used by all. Access to specific z/OS system commands is logged as indicated in the table entitled MVS commands, RACF access authorities, and resource names, in the IBM z/OS MVS System Commands manual.

Fix: F-25579r516154_fix

Ensure access to the MVS resource of the OPERCMDS class is restricted to a limited number of authorized users, and all access is logged. Ensure access to z/OS system commands as defined in the table entitled MVS commands, RACF access authorities, and resource names, in the IBM z/OS MVS System Commands manual is restricted to the appropriate personnel (e.g., operations staff, systems programming personnel, general users). Ensure no access is granted at level MVS.**. NOTE: Use the GROUP category specified in the table referenced above as a guideline to determine appropriate personnel access to system commands. NOTE: The (MVS.SEND) Command will not be a finding if used by all. Example: TSS ADDTO(deptacid) OPERCMDS(MVS.) TSS PERMIT(usracid) OPERCMDS(MVS.ACTIVATE) ACTION(AUDIT) TSS PERMIT(usracid) OPERCMDS(MVS.CANCEL.JOB.) ACTION(AUDIT) TSS PERMIT(usracid) OPERCMDS(MVS.CONTROL.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(usracid) OPERCMDS(MVS.DISPLAY.) ACCESS(READ) TSS PERMIT(usracid) OPERCMDS(MVS.MONITOR) ACCESS(READ) TSS PERMIT(usracid) OPERCMDS(MVS.STOPMN) ACCESS(READ)

b
IBM z/OS MCS consoles access authorization(s) for CONSOLE resource(s) must be properly protected.
AC-3 - Medium - CCI-000213 - V-223919 - SV-223919r877760_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000460
Vuln IDs
  • V-223919
  • V-98545
Rule IDs
  • SV-223919r877760_rule
  • SV-107649
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25592r811046_chk

From the ISPF Command Shell enter: TSS WHOOWNS SYSCONS(*) For each Console defined enter: TSS WHOHAS SYSCONS(&lt;console&gt;) If the ACID associated with each console has READ access to the corresponding resource defined in the SYSCONS resource class, this is not a finding. If access authorization for SYSCONS resources restricts access to operations, the Master SCA, system programming personnel, or authorized personnel, this is not a finding. If the console defined is not defined to the TSS SYSCONS resource class enter: TSS LIST (RDT) RESCLASS(SYSCONS) If the SYSCONS resource class does not have the DEPROT attribute, this is a finding. For each Console defined enter: TSS WHOHAS(&lt;CONSOLE&gt;) If the console defined is not defined to the TSS SYSCONS resource class enter: TSS LIST (RDT) RESCLASS(SYSCONS) If the SYSCONS resource class does not have the DEPROT attribute, this is a finding.

Fix: F-25580r811047_fix

Ensure that all MCS consoles are defined to the SYSCONS resource class and READ access is limited to operators, and system programmers, or authorized personnel. Review the MCS console resources defined to z/OS and the ACP and ensure they conform to those outlined below. Each console defined in the CONSOLxx parmlib members is defined to TSS SYSCONS resource class and/or the SYSCONS resource class has the DEFPROT attribute. Example: TSS REPLACE(RDT) RESCLASS(SYSCONS) ATTR(DEFPROT) The ACID associated with each console has access to the corresponding resource defined in the SYSCONS resource class. Example: TSS PERMIT(MMGMST) SYSCONS(MMGMST) ACCESS(READ) Access authorization for SYSCONS resources restricts access to operations, the Master SCA, and system programming personnel. TSS PERMIT(opersmpl) SYSCONS(MMGMST) ACCESS(READ) TSS PERMIT(Master SCA) SYSCONS(MMGMST) ACCESS(READ) TSS PERMIT(syspsmpl) SYSCONS(MMGMST) ACCESS(READ)

b
CA-TSS must properly define users that have access to the CONSOLE resource in the TSOAUTH resource class.
AC-3 - Medium - CCI-000213 - V-223920 - SV-223920r877761_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000470
Vuln IDs
  • V-223920
  • V-98547
Rule IDs
  • SV-223920r877761_rule
  • SV-107651
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25593r516159_chk

TSS WHOOWNS TSOAUTH(*) If the Console is not defined to TSOAuth RESOURCE CLASS this is Not Applicable. Refer to the CONSOLxx member of SYS1.PARMLIB. For each Console defined if the following is true, this is not a finding. -User ACIDs are restricted to the INFO level in the MCSAUTH attribute. -User ACIDs are restricted to READ access to the MVS.MCSOPER.acid resource defined in the OPERCMDS resource class. -User ACIDs and/or profile ACIDs are restricted to the CONSOLE resource defined in the TSOAUTH resource class. If any of the above are untrue, this is a finding.

Fix: F-25581r516160_fix

Evaluate the impact of correcting any deficiencies. Develop a plan of action and implement the required changes. At the discretion of the ISSO, users may be allowed to issue z/OS system commands from a TSO session. With this in mind, ensure the following items are in effect for users granted the TSO CONSOLE privilege: -User ACIDs are restricted to the INFO level in the MCSAUTH attribute. -User ACIDs are restricted to READ access to the MVS.MCSOPER.acid resource defined in the OPERCMDS resource class. -User ACIDs and/or profile ACIDs are restricted to the CONSOLE resource defined in the TSOAUTH resource class. For Example: TSS ADDTO (userid) MCSAUTH(INFO) TSS PERMIT(userid) OPERCMDS(MVS.MCSOPER.userid) ACCESS(READ) ACTION(AUDIT) TSS PERMIT(oprprofileacid) TSOAUTH(CONSOLE) ACCESS(READ) ACTION(AUDIT)

b
IBM z/OS Operating system commands (MVS.) of the OPERCMDS resource class must be properly owned.
AC-3 - Medium - CCI-000213 - V-223921 - SV-223921r877762_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000480
Vuln IDs
  • V-223921
  • V-98549
Rule IDs
  • SV-223921r877762_rule
  • SV-107653
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25594r516162_chk

From the ISPF Command Shell enter: TSS WHOOWNS OPERCMDS(MVS) If the (MVS) resource is owned, this is not a finding. If the (MVS) resource is not owned, this is a finding. TSS LIST RDT RESCLASS(OPERCMDS) If the (MVS) resource is not OWNED and the OPERCMDS class does not have DEFPROT as an attribute, this is a finding.

Fix: F-25582r516163_fix

z/OS system command controls are provided via resources in the OPERCMDS resource class. Configure (MVS) of the OPERCMDS resource class to be properly owned or at a minimum the OPERCMDS resource in the RDT specifies the DEFPROT attribute. Name the actual owning ACID specified for deptacid in accordance with installation recommendations. When protecting the facilities for z/OS system commands via the OPERCMDS class, use the following controls: (1) Prevent access to the z/OS resources by default, and log all access. Create generic and specific permissions with logging as required using the required controls for z/OS System Commands listed in ACP00282. For example: TSS ADDTO(deptacid) OPERCMDS(MVS.) TSS PERMIT(usracid) OPERCMDS(MVS.ACTIVATE) ACTION(AUDIT) TSS PERMIT(usracid) OPERCMDS(MVS.CANCEL.JOB.) ACTION(AUDIT) TSS PERMIT(usracid) OPERCMDS(MVS.CONTROL.) ACCESS(UPDATE) ACTION(AUDIT) TSS PERMIT(usracid) OPERCMDS(MVS.DISPLAY.) ACCESS(READ) TSS PERMIT(usracid) OPERCMDS(MVS.MONITOR) ACCESS(READ) TSS PERMIT(usracid) OPERCMDS(MVS.STOPMN) ACCESS(READ)

b
CA-TSS AUTH Control Option values specified must be set to (OVERRIDE,ALLOVER) or (MERGE,ALLOVER).
AC-3 - Medium - CCI-000213 - V-223922 - SV-223922r877763_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000490
Vuln IDs
  • V-223922
  • V-98551
Rule IDs
  • SV-223922r877763_rule
  • SV-107655
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25595r516165_chk

TSS MODIFY STATUS If the AUTH Control Option values are not set to AUTH(OVERRIDE, ALLOVER) or AUTH(MERGE, ALLOVER), this is a finding.

Fix: F-25583r516166_fix

Configure the AUTH control option is set to (OVERRIDE, ALLOVER) or (MERGE, ALLOVER). With (OVERRIDE, ALLOVER), TSS separately searches first the user, then profiles, and then the ALL record for its access authorization. With (MERGE, ALLOVER), TSS merges and searches the user and all profiles, and then the ALL record for its access authorization. Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting to AUTH(OVERRIDE, ALLOVER) or AUTH(MERGE, ALLOVER) and proceed with the change.

c
Access to the CA-TSS MODE resource class must be appropriate.
AC-3 - High - CCI-000213 - V-223923 - SV-223923r877764_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000500
Vuln IDs
  • V-223923
  • V-98553
Rule IDs
  • SV-223923r877764_rule
  • SV-107657
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25596r516168_chk

From the ISPF Command Shell enter: TSS WHOHAS MODE(*) If any ACIDs is permitted a mode of "DORM", "WARN", or "IMPL", this is a finding.

Fix: F-25584r516169_fix

Evaluate the impact associated with implementation of the removal of this access. Develop a plan of action to ensure that the ACIDs use the default MODE settings and proceed with the change.

b
Data set masking characters must be properly defined to the CA-TSS security database.
AC-3 - Medium - CCI-000213 - V-223924 - SV-223924r877765_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000505
Vuln IDs
  • V-223924
  • V-98555
Rule IDs
  • SV-223924r877765_rule
  • SV-107659
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25597r516171_chk

From the ISPF Command Shell enter: TSS WHOOWNS data set(*) If data set masking characters. (*, %, and +, **) are owned by the MSCA, this is not a finding.

Fix: F-25585r516172_fix

Configure all data set masking characters to be owned the MSCA. Example TSS commands to protect masking characters: TSS ADD(msca) DSN(*) TSS ADD(msca) DSN(%) TSS ADD(msca) DSN(+)

c
CA-TSS Emergency ACIDs must be properly limited and must audit all resource access.
AC-3 - High - CCI-000213 - V-223925 - SV-223925r877766_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000510
Vuln IDs
  • V-223925
  • V-98557
Rule IDs
  • SV-223925r877766_rule
  • SV-107661
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25598r868947_chk

Refer to the SYS1.UADS. Ask the System Administrator for list of all emergency ACIDs available to the site along with the associated function of each. If there are no emergency ACIDs defined ask the system administrator for an alternate documented procedure to handle emergencies. If there are no emergency ACIDs and no documented emergency procedure, this is a finding. If at a minimum, an emergency ACID exists with the security administration attributes specified in accordance with the following requirements, this is not a finding. For emergency IDs with security administration privileges, but which cannot access and update system data sets: ADMIN Authority: ACID(ALL) DATA(ALL) OTRAN(ALL) MISC1(INSTDATA,SUSPEND,TSSSIM,NOATS) MISC2(TSO,TARGET) MISC8(PWMAINT,REMASUSP) MISC9(GENERIC) FACILITY(BATCH, TSO, ROSCOE, CICS, xxxx) Where 'xxxx' is a facility the application security team grants access into for their application users. An additional class of userids can exist to perform all operating system functions except ESM administration. These emergency ACID(s) will have ability to access and update all system data sets but will not have security administration privileges. See the following requirements: Data set permissions for the emergency ACIDs will be permitted as follows: TSS PER(acid) DSN(*****) ACCESS(ALL) ACTION(AUDIT) Security Bypass Attributes NODSNCHK, NOVOLCHK, and NORESCHK will not be given to the Emergency ACIDs. All emergency ACID(s) are to be implemented with logging to provide an audit trail of their activities. All emergency ACID(s) are to be maintained in both the ESM and SYS1.UADS to ensure they are available in the event that the ESM is not functional. All emergency ACID(s) will have distinct, different passwords in SYS1.UADS and in the ACP, and the site is to establish procedures to ensure that the passwords differ. The password for any ID in SYS1.UADS is never to match the password for the same ID in the ACP. All emergency ACID(s) will have documented procedures to provide a mechanism for the use of the IDs. Their release for use is to be logged, and the log is to be maintained by the ISSO. When an emergency ACID is released for use, its password is to be reset by the ISSO within 12 hours. 1) Review the access authorizations for all emergency ACIDs to ensure that all access permitted to these ACIDs is reviewed and approved by the ISSO. 2) If emergency ACIDs are utilized, ensure they are restricted to performing only the operating system recovery functions or the ESM administration functions. If these emergency ACID(s) have ability to ACCESS and UPDATE all system data sets, but do not have security administration privileges, this is not a finding. Note: If running Quest NC-Pass, validate that the Emergency ACIDS are identified to have the FACILITY of NCPASS and SECURID resource in the ABSTRACT resource class.

Fix: F-25586r868948_fix

Configure any emergency ACID to have only access to resources required to support the specific functions of the owning department and that access to these resources is audited. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes. TSS PER(acid) DSN(*****) ACCESS(ALL) ACTION(AUDIT) Security Bypass Attributes NODSNCHK, NOVOLCHK, and NORESCHK will not be given to the Emergency ACIDs. All emergency ACID(s) are to be implemented with logging to provide an audit trail of their activities. All emergency ACID(s) are to be maintained in both the ACP and SYS1.UADS to ensure they are available in the event that the ACP is not functional. All emergency ACID(s) will have distinct, different passwords in SYS1.UADS and in the ACP, and the site is to establish procedures to ensure that the passwords differ. The password for any ID in SYS1.UADS is never to match the password for the same ID in the ACP. All emergency ACID(s) will have documented procedures to provide a mechanism for the use of the IDs. Their release for use is to be logged, and the log is to be maintained by the ISSO. When an emergency ACID is released for use, its password is to be reset by the ISSO within 12 hours. If no emergency userids are in use on the system, develop and document a procedure to manage emergency access to the system.

b
CA-TSS ACIDs must not have access to FAC(*ALL*).
AC-3 - Medium - CCI-000213 - V-223926 - SV-223926r877767_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000520
Vuln IDs
  • V-223926
  • V-98559
Rule IDs
  • SV-223926r877767_rule
  • SV-107663
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25599r516177_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) DATA(BASIC) If any ACID(s) is (are) assigned FACILITY(*ALL*), this is a finding.

Fix: F-25587r516178_fix

The ISSO will ensure that blanket access to all facilities; FACILITY(ALL), is never granted. Review all access to FACILITY(*ALL*). Evaluate the impact of correcting the deficiency. Develop a plan of action and remove access to FAC(*ALL*). Example: TSS REM(acid) FAC(ALL)

b
The CA-TSS ALL record must have appropriate access to Facility Matrix Tables.
AC-3 - Medium - CCI-000213 - V-223927 - SV-223927r877768_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000530
Vuln IDs
  • V-223927
  • V-98561
Rule IDs
  • SV-223927r877768_rule
  • SV-107665
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25600r516180_chk

Review the ALL record for the assignment of FACILITY. If CA-Top Secret facilities are granted via the ALL record, with the exception of DFHSM/HSM, this is a finding. The DFHSM/HSM FACILITY can be determined by reviewing FACLIST for the FACILITY that contains INITPGM=ARC.

Fix: F-25588r516181_fix

Review ALL record for FACILITY access. Evaluate the impact of correcting the deficiency. Develop a plan of action and remove access.

b
Data set masking characters allowing access to all data sets must be properly restricted in the CA-TSS security database.
AC-3 - Medium - CCI-000213 - V-223928 - SV-223928r877769_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000550
Vuln IDs
  • V-223928
  • V-98563
Rule IDs
  • SV-223928r877769_rule
  • SV-107667
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25601r868950_chk

Refer the accesses to the TSS masking character (*, *., and/or **) for data sets. If the following guidance is true, this is not a finding. If the TSS data set access authorizations restrict READ access to auditors, this is not a finding. If the TSS data set access authorizations restrict READ and/or greater access to DASD administrators, Trusted Started Tasks, emergency users, and DASD batch users, this is not a finding. If CA VTAPE is installed on the systems and the TSS data set access authorizations restrict READ access to CA VTAPE STCs and/or batch users, this is not a finding. If the TSS data set access authorizations specify that all (i.e., failures and successes) EXECUTE and/or greater accesses are logged, this is not a finding.

Fix: F-25589r868951_fix

Review access authorization to the TSS mask character (*, *., and/or **) for data sets. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes required to restrict access to the data set mask permissions. 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 accesses are logged. The 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 confirm that they are properly restricted to the ACP (Access Control Program) active on the system. (Note: The data sets and/or data set prefixes identified below are examples of a possible installation. The actual data sets and/or prefixes are determined when the product is actually installed on a system through the product's installation guide and can be site specific.) Auditors may require READ access to all data sets. DASD administrators, Trusted Started Tasks, emergency users, and DASD batch users that require READ and/or greater access to perform maintenance to all data sets. If CA VTAPE is installed on the system, READ access can be given to the CA VTAPE STCs and/or batch users. All accesses authorizations will be logged. The exception is the logging requirement is not required for Trusted Started Tasks. The following commands are provided as a sample for implementing data set controls: TSS ADDTO(msca) DATASET(*.) TSS PERMIT(smplsmpl) DATASET(*.) ACCESS(READ) ACTION(AUDIT) TSS PERMIT(CA VTape STC) DATASET(*.) ACCESS(READ) ACTION(AUDIT) TSS PERMIT(dasbsmpl) DATASET(*.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(dasdsmpl) DATASET(*.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(emersmpl) DATASET(*.) ACCESS(ALL) ACTION(AUDIT) TSS PERMIT(tstcsmpl) DATASET(*.) ACCESS(ALL)

c
IBM z/OS DASD Volume access greater than CREATE found in the CA-TSS database must be limited to authorized information technology personnel requiring access to perform their job duties.
AC-3 - High - CCI-000213 - V-223929 - SV-223929r877770_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
TSS0-ES-000560
Vuln IDs
  • V-223929
  • V-98565
Rule IDs
  • SV-223929r877770_rule
  • SV-107669
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25602r516186_chk

From the ISPF Command Shell enter: TSS WHOOWNS VOLUME(*) For each volume identified issue WHOHAS (&lt;volume id&gt;) If access authorizations greater than CREATE (e.g., CONTROL or ALL) granted for DASD volumes are within the requirements in the site security plan, this is not a finding. If access authorization for volumes exceeds the requirements without justification, this is a finding. NOTE: Domain-level DASD Administrators who are responsible for the Domain level DASD/storage administration. Volume level access to those team members who are directly responsible and perform Domain level DASD/Storage administration may be granted access to all volumes via PRIVPGM controls.

Fix: F-25590r516187_fix

Ensure that DASD VOLUME access authorization greater than CREATE is not permitted unless authorized by the ISSO. Review all access to DASD VOLUMEs. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the required changes. *Noted Exception: Domain level DASD Administrators who are responsible for the Domain level DASD/storage administration. Volume level access to those team members who are directly responsible and perform Domain level DASD/Storage administration may be granted access to all volumes via PRIVPGM controls. Domain Level DASD/Storage administrators access should be granted VOL(*ALL*)ACC(ALL)ACTION(AUDIT)PRIVPGM(list of privileged programs)

b
IBM z/OS Sensitive Utility Controls must be properly defined and protected.
AC-3 - Medium - CCI-000213 - V-223930 - SV-223930r877771_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-ES-000570
Vuln IDs
  • V-223930
  • V-98567
Rule IDs
  • SV-223930r877771_rule
  • SV-107671
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25603r868953_chk

Refer to the table of Sensitive Utilities resources and/or generic equivalent as detail in the table below. If the TSS resource access authorizations for the following sensitive utilities restrict access to the appropriate personnel, this is not a finding. Sensitive Utility Controls Program Product Function AHLGTF z/OS System Activity Tracing HHLGTF IHLGTF ICPIOCP z/OS System Configuration IOPIOCP IXPIOCP IYPIOCP IZPIOCP BLSROPTR z/OS Data Management DEBE OS/DEBE Data Management DITTO OS/DITTO Data Management FDRZAPOP FDR Product Internal Modification GIMSMP SMP/E Change Management Product ICKDSF z/OS DASD Management IDCSC01 z/OS IDCAMS Set Cache Module IEHINITT z/OS Tape Management IFASMFDP z/OS SMF Data Dump Utility IND$FILE z/OS PC to Mainframe File Transfer (Applicable only for classified systems) CSQJU003 IBM WebSphereMQ CSQJU004 CSQUCVX CSQ1LOGP CSQUTIL WHOIS z/OS Share MOD to identify user name from USERID. Restricted to data center personnel only. If the TSS resources are owned or DEFPROT is specified for the resource class, this is not a finding. If the TSS resource logging is correctly specified, this is not a finding.

Fix: F-25591r868954_fix

Ensure that the following are properly specified in the ACP. Note: The 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. Ensure that all Sensitive Utility Controls resources and/or generic equivalent are properly protected according to the requirements specified in Sensitive Utility Controls table below. This table lists the resources, access requirements, and logging requirements for Sensitive Utilities, ensures the following guidelines are followed: Sensitive Utility Controls Program Product Function AHLGTF z/OS System Activity Tracing HHLGTF IHLGTF ICPIOCP z/OS System Configuration IOPIOCP IXPIOCP IYPIOCP IZPIOCP BLSROPTR z/OS Data Management DEBE OS/DEBE Data Management DITTO OS/DITTO Data Management FDRZAPOP FDR Product Internal Modification GIMSMP SMP/E Change Management Product ICKDSF z/OS DASD Management IDCSC01 z/OS IDCAMS Set Cache Module IEHINITT z/OS Tape Management IFASMFDP z/OS SMF Data Dump Utility IND$FILE z/OS PC to Mainframe File Transfer (Applicable only for classified systems) CSQJU003 IBM WebSphereMQ CSQJU004 CSQUCVX CSQ1LOGP CSQUTIL WHOIS z/OS Share MOD to identify user name from USERID. Restricted to data center personnel only. The TSS resources as designated in the above table are owned and/or DEFPROT is specified for the resource class. The TSS resource access authorizations restrict access to the appropriate personnel as designated in the above table. The following commands are provided as a sample for implementing resource controls: TSS ADD(dept-acid) PROGRAM(AHLGTF) TSS PERMIT(stcgsmpl) PROGRAM(AHLGTF) ACTION(AUDIT)

b
IBM z/OS Started tasks must be properly defined to CA-TSS.
CM-6 - Medium - CCI-000366 - V-223931 - SV-223931r881331_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000580
Vuln IDs
  • V-223931
  • V-98569
Rule IDs
  • SV-223931r881331_rule
  • SV-107673
Started procedures have system generated job statements that do not contain the user, group, or password statements. To enable the started procedure to access the same protected resources that users and groups access, started procedures must have an associated USERID. If a USERID is not associated with the started procedure, the started procedure will not have access to the resources. To ensure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system.
Checks: C-25604r881330_chk

Refer to the site security plan, the system administrator, and system libraries to determine list of stated tasks available on the system. If the following guidance is true, this is not a finding. -All started tasks are assigned a unique user ACID or STC ACIDs that will be unique per product and function if supported by vendor documentation. -Every ACID with the STC Facility has a corresponding entry defined in the STC record. -Every ACID defined in the STC record has a corresponding user ACID defined to TSS with the STC Facility. -All STC ACIDs will have a password generated in accordance with STIG requirements. -All STC ACIDs will be sourced to the internal reader (e.g., ADD(stc-acid) SOURCE(INTRDR). -The STC ACIDs may have the NOSUSPEND attribute.

Fix: F-25592r516193_fix

Review the STC record and all associated ACIDs. Ensure STCs and associated ACIDs are defined to the STC record. Restrict access to required resources only. Evaluate the impact of correcting the deficiency. Ensure TSS started task table record contains an entry for each Started Proc that maps the proc to a unique userid, or STC ACIDs will be unique per product and function if supported by vendor documentation. Develop a plan of action and implement the changes as specified: All STC ACIDs will have the STC facility. An STC also may be granted the FAC(BATCH) if it requires the capability to submit batch jobs to the internal reader. It should be noted, however, that this also will allow the STC itself to be executed as a batch job. TSS ADD(stc-acid) FACILITY(STC BATCH) Each STC ACID will be defined with a password following the password requirement guidelines. The only exception is that these passwords will be defined as non-expiring. In addition, each STC will have its own unique password. Defining a password for started tasks prevents a user from logging onto a system with the STC ACID. TSS REP(stc-acid) PASSWORD(xxxxxxxx,0) Ensure the OPTIONS control option specifies a value of 4 to disable password checking for STCs. Otherwise operators will be forced to supply a password when STCs are started. All STC ACIDs will be sourced to the internal reader. This control will further protect the unauthorized use of STC ACIDs. TSS ADD(stc-acid) SOURCE(INTRDR) Every STC will be defined to the STC table, associated with a specific procedure, and granted minimum access. TSS ADD(STC) PROCNAME(stc-proc) ACID(stc-acid) Note: The STC ACIDs may have the NOSUSPEND attribute to exempt an STC ACID from suspension for excessive violations. Review the STC record and all associated ACIDs. Ensure STCs and associated ACIDs are defined to the STC record. Restrict access to required resources only. Evaluate the impact of correcting the deficiency. Ensure TSS started task table record contains an entry for each Started Proc that maps the proc to a unique userid, or STC ACIDs will be unique per product and function if supported by vendor documentation. Develop a plan of action and implement the changes as specified: All STC ACIDs will have the STC facility. An STC also may be granted the FAC(BATCH) if it requires the capability to submit batch jobs to the internal reader. It should be noted, however, that this also will allow the STC itself to be executed as a batch job. TSS ADD(stc-acid) FACILITY(STC BATCH) Each STC ACID will be defined with a password following the password requirement guidelines. The only exception is that these passwords will be defined as non-expiring. In addition, each STC will have its own unique password. Defining a password for started tasks prevents a user from logging onto a system with the STC ACID. TSS REP(stc-acid) PASSWORD(xxxxxxxx,0) Ensure the OPTIONS control option specifies a value of 4 to disable password checking for STCs. Otherwise operators will be forced to supply a password when STCs are started. All STC ACIDs will be sourced to the internal reader. This control will further protect the unauthorized use of STC ACIDs. TSS ADD(stc-acid) SOURCE(INTRDR) Every STC will be defined to the STC table, associated with a specific procedure, and granted minimum access. TSS ADD(STC) PROCNAME(stc-proc) ACID(stc-acid) Note: The STC ACIDs may have the NOSUSPEND attribute to exempt an STC ACID from suspension for excessive violations.

b
The CA-TSS CANCEL Control Option must not be specified.
CM-6 - Medium - CCI-000366 - V-223932 - SV-223932r877773_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000590
Vuln IDs
  • V-223932
  • V-98571
Rule IDs
  • SV-223932r877773_rule
  • SV-107675
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections. The CANCEL Control Option allows security administrators to use the O/S CANCEL command to bring the TSS address space down.
Checks: C-25605r516195_chk

From the ISPF Command enter: TSS MODIFY STATUS If the CANCEL Control Option is not specified, this is not a finding.

Fix: F-25593r516196_fix

Remove the CANCEL sub-option from the Control Options list. TSS MODIFY(control_option [(suboption_list)])

b
The CA-TSS HPBPW Control Option must be set to three days maximum.
CM-6 - Medium - CCI-000366 - V-223933 - SV-223933r877774_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000600
Vuln IDs
  • V-223933
  • V-98573
Rule IDs
  • SV-223933r877774_rule
  • SV-107677
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements.
Checks: C-25606r516198_chk

From the ISPF Command enter: TSS MODIFY STATUS If the HPBPW Control Option value is set to (3) days maximum, this is not a finding. If the HPBPW Control Option value is set to greater than (3) days, this is a finding.

Fix: F-25594r516199_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the HPBPW control option setting to a maximum of 3 days.

b
The CA-TSS INSTDATA Control Option must be set to 0.
CM-6 - Medium - CCI-000366 - V-223934 - SV-223934r877775_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000610
Vuln IDs
  • V-223934
  • V-98575
Rule IDs
  • SV-223934r877775_rule
  • SV-107679
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements.
Checks: C-25607r516201_chk

From the ISPF Command enter: TSS MODIFY STATUS If the INSTDATA Control Option is set to NONE this is not a finding.

Fix: F-25595r516202_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to set the INSTDATA control option value to (0) and proceed with the change.

b
The CA-TSS OPTIONS Control Option must include option 4 at a minimum.
CM-6 - Medium - CCI-000366 - V-223935 - SV-223935r877776_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000620
Vuln IDs
  • V-223935
  • V-98577
Rule IDs
  • SV-223935r877776_rule
  • SV-107681
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements.
Checks: C-25608r516204_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the OPTIONS Control Option contains at a minimum option number (4), this is not a finding.

Fix: F-25596r516205_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified following and proceed with the change. The OPTIONS Control Option must contain at a minimum option number (4). Example TSS PARMFILE Control Option entry: OPTIONS(4,5,6,12,14)

b
CA-TSS TEMPDS Control Option must be set to YES.
CM-6 - Medium - CCI-000366 - V-223936 - SV-223936r877777_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000630
Vuln IDs
  • V-223936
  • V-98579
Rule IDs
  • SV-223936r877777_rule
  • SV-107683
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements.
Checks: C-25609r516207_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the TEMPDS Control Option value is set to TEMPDS(YES), this not a finding.

Fix: F-25597r516208_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting to TEMPDS(YES), and proceed with the change.

b
The number of CA-TSS control ACIDs must be justified and properly assigned.
CM-6 - Medium - CCI-000366 - V-223937 - SV-223937r877778_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000640
Vuln IDs
  • V-223937
  • V-98581
Rule IDs
  • SV-223937r877778_rule
  • SV-107685
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25610r868956_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) TYPE(SCA) DATA(BASIC) If the persons listed agree with the site security plan, this is not a finding.

Fix: F-25598r868957_fix

Review all security administrator ACIDs. Evaluate the impact of correcting the deficiency. Develop a plan of action and reduce the number of control ACIDs if not justified. Use information below as guidance. TYPE=CENTRAL, TYPE=MASTER or also known as "SCA" and "MSCA" level of ACIDS will adhere to the following restrictions based upon documented role/function an individual performs: -Domain level Information System Security Officer (ISSO) - full administrative authorities and access rights needed to perform required and documented role/responsibilities/function. -Assistance Domain Level Information System Security Officer or "backup" or ISSO (up to same access as 1). -DISA SRR Auditor, DoD IG Auditor, SAS70 Auditor - only "view" administrative authorities must be granted and only for those roles/functions that have been formally documented as DISA, DoD IG or SAS70 Auditors and approved by the DISA AO for those position/functions/roles. Exception: Until scoping is worked out and resolved, DISA OST team members may be defined as TYPE=CENTRAL with limited authority such as ACID(INFO,MAINTAIN). All OST Team member ACIDs will be changed to TYPE=LIMITED and scoped accordingly to allow password resets upon verification of users, yet to limit and eliminate any potential risk associated with resetting of MSCA or other SCA level accounts. NO other exceptions will exist.

b
The number of CA-TSS ACIDs with MISC9 authority must be justified.
CM-6 - Medium - CCI-000366 - V-223938 - SV-223938r877779_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000650
Vuln IDs
  • V-223938
  • V-98583
Rule IDs
  • SV-223938r877779_rule
  • SV-107687
Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25611r516213_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) DATA(ADMIN) If the ACIDs having MISC9(ALL) or MISC9(CONSOLE) authority are designated SCAs who are responsible for the security for the domain this is not a finding.

Fix: F-25599r516214_fix

Review all ACIDs with the MISC9 attribute. Evaluate the impact of removing MISC9(ALL) or MISC9(CONSOLE) access from ACIDs not required to assign the CONSOLE attribute. It is suggested that MISC9(CONSOLE) assignment privileges be limited to the MSCA. Develop a plan of action and implement the changes.

b
The CA-TSS LUUPDONCE Control Option value specified must be set to NO.
CM-6 - Medium - CCI-000366 - V-223939 - SV-223939r877780_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000660
Vuln IDs
  • V-223939
  • V-98585
Rule IDs
  • SV-223939r877780_rule
  • SV-107689
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25612r516216_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the LUUPDONCE Control Option value is set to "YES", this is a finding.

Fix: F-25600r516217_fix

Configure LUUPDONCE control option is set to (NO). Evaluate the impact associated with implementation of the control option. Develop a plan of action to set the control option setting to NO and proceed with the change.

b
The CA-TSS Automatic Data Set Protection (ADSP) Control Option must be set to NO.
CM-6 - Medium - CCI-000366 - V-223940 - SV-223940r877781_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000670
Vuln IDs
  • V-223940
  • V-98587
Rule IDs
  • SV-223940r877781_rule
  • SV-107691
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25613r516219_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the ADSP Control Option value is not set to "ADSP(NO)", this is a finding.

Fix: F-25601r516220_fix

Configure the ADSP control option is set to (NO) indicating that the RACF bit in the DSCB will not be set. Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting to ADSP(NO) and proceed with the change.

b
CA-TSS RECOVER Control Option must be set to ON.
CM-6 - Medium - CCI-000366 - V-223941 - SV-223941r877782_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-ES-000680
Vuln IDs
  • V-223941
  • V-98589
Rule IDs
  • SV-223941r877782_rule
  • SV-107693
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25614r516222_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the RECOVER Control Option value is not set to "RECOVER(ON)", this is a finding.

Fix: F-25602r516223_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the following control option setting as specified and proceed with the change. RECOVER(ON)

b
IBM z/OS must properly configure CONSOLxx members.
CM-7 - Medium - CCI-000382 - V-223942 - SV-223942r877783_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000382
Version
TSS0-ES-000690
Vuln IDs
  • V-223942
  • V-98591
Rule IDs
  • SV-223942r877783_rule
  • SV-107695
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Checks: C-25615r516225_chk

Review each CONSOLxx parmlib member. If the following guidance is true, this is not a finding. The "DEFAULT" statement for each CONSOLxx member specifies "LOGON(REQUIRED)" or "LOGON(AUTO)". The "CONSOLE" statement for each console assigns a unique name using the "NAME" parameter. The "CONSOLE" statement for each console specifies "AUTH(INFO)". Exceptions are the "AUTH" parameter is not valid for consoles defined with "UNIT(PRT)" and specifying "AUTH(MASTER)" is permissible for the system console. Note: The site should be able to determine the system consoles. However, it is imperative that the site adhere to the "DEFAULT" statement requirement.

Fix: F-25603r516226_fix

Configure the "DEFAULT" statement to specify "LOGON(REQUIRED)" so that all operators are required to log on prior to entering z/OS system commands. At the discretion of the ISSO, "LOGON(AUTO)" may be used. If "LOGON(AUTO)" is used assure that the console userids are defined with minimal access. See ACP00292. Configure each "CONSOLE" statement to specify an explicit console NAME. And that "AUTH(INFO)" is specified, this also including extended MCS consoles. "AUTH(MASTER)" may be specified for systems console. Note: The site should be able to determine the system consoles. However, it is imperative that the site adhere to the "DEFAULT" statement requirement.

b
IBM z/OS must properly protect MCS console userid(s).
CM-7 - Medium - CCI-000382 - V-223943 - SV-223943r877784_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000382
Version
TSS0-ES-000700
Vuln IDs
  • V-223943
  • V-98593
Rule IDs
  • SV-223943r877784_rule
  • SV-107697
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Checks: C-25616r516228_chk

Refer to IEASYS00 to determine correct CONSOLxx member. Examine the CONSOLxx member. If the following guidance is true, this is not a finding. Each console defined in the currently active CONSOLxx parmlib member in EXAM.RPT(PARMLIB) is associated with a valid TSS ACID. Each console ACID has no special privileges and/or attributes (e.g., BYPASSING, CONSOLE, etc.; excluding VTAM SMCS consoles). Each console ACID has no accesses to interactive on-line facilities (e.g., TSO, CICS, etc.; excluding VTAM SMCS consoles). Each console can have the Facility of CONSOLE. Each console ACID will be restricted from accessing all data sets and resources except MVS.MCSOPER.consolename in the OPERCMDS resource class and consolename in the CONSOLE resource class. NOTE: If LOGON(AUTO) is specified in the currently active CONSOLxx parmlib member, additional access may be required. Permissions for the console ACIDs and/or console profile may be given with access READ to MVS.CONTROL, MVS.DISPLAY, MVS.MONITOR, and MVS.STOPMN OPERCMDS resource.

Fix: F-25604r516229_fix

Review the MCS console resources defined to z/OS and the ACP, and ensure they conform to those outlined below. Each console defined in the currently active CONSOLxx parmlib member in EXAM.RPT(PARMLIB) is associated with a valid TSS ACID. Each console ACID has no special privileges and/or attributes (e.g., BYPASSING, CONSOLE, etc.). Each console ACID has no accesses to interactive on-line facilities (e.g., TSO, CICS, etc.; excluding VTAM SMCS consoles). Each console can have the Facility of CONSOLE. Each console ACID will be restricted from accessing all data sets and resources except MVS.MCSOPER.consolename in the OPERCMDS resource class and consolename in the CONSOLE resource class. NOTE: If LOGON(AUTO) is specified in the currently active CONSOLxx parmlib member, additional access may be required. Permissions for the console ACIDs and/or console profile may be given with access READ to MVS.CONTROL, MVS.DISPLAY, MVS.MONITOR, and MVS.STOPMN OPERCMDS resource. Example: (These are only examples, not requirements.) TSS CREATE(consnoautolog) TYPE(PROFILE) NAME('MCS consoles with no autolog') DEPT('SYS1') TSS CREATE(consautolog) TYPE(PROFILE) - NAME('MCS consoles with autolog') - DEPT('SYS1') TSS CREATE(consname) NAME('MCS console name') - FACILITY(CONSOLE) PASSWORD(password,0) - PROFILE(consgroup) TSS PER(consautolog) OPERCMDS(MVS.CONTROL) ACCESS(READ) TSS PER(consautolog) OPERCMDS(MVS.DISPLAY) ACCESS(READ) TSS PER(consautolog) OPERCMDS(MVS.MONITOR) ACCESS(READ) TSS PER(consautolog) OPERCMDS(MVS.STOPMN) ACCESS(READ) TSS PER(consname) SYSCONS(consname) ACCESS(READ)

b
The CA-TSS CPFRCVUND Control Option value specified must be set to NO.
IA-2 - Medium - CCI-000764 - V-223944 - SV-223944r877785_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
TSS0-ES-000710
Vuln IDs
  • V-223944
  • V-98595
Rule IDs
  • SV-223944r877785_rule
  • SV-107699
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25617r516231_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the "CPFRCVUND" Control Option value is set to "YES", this is a finding.

Fix: F-25605r516232_fix

Configure the CPFRCVUND control option value to (NO). Evaluate the impact associated with implementation of the control option. Develop a plan of action to set the control option setting to "NO" and proceed with the change.

b
The CA-TSS CPFTARGET Control Option value specified must be set to LOCAL.
IA-2 - Medium - CCI-000764 - V-223945 - SV-223945r877786_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
TSS0-ES-000720
Vuln IDs
  • V-223945
  • V-98597
Rule IDs
  • SV-223945r877786_rule
  • SV-107701
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25618r516234_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the CPFTARGET Control Option value specified is not set to "LOCAL", this is a finding.

Fix: F-25606r516235_fix

Configure the CPFTARGET Control Option value specified set to LOCAL.

a
CA-TSS User ACIDs and Control ACIDs must have the NAME field completed.
IA-2 - Low - CCI-000764 - V-223946 - SV-223946r877787_rule
RMF Control
IA-2
Severity
Low
CCI
CCI-000764
Version
TSS0-ES-000730
Vuln IDs
  • V-223946
  • V-98599
Rule IDs
  • SV-223946r877787_rule
  • SV-107703
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25619r516237_chk

From the ISPF Command Shell enter: TSS LIST (ACIDs) DATA (BASIC) If any ACID does not have the "NAME" field completed, this is a finding.

Fix: F-25607r516238_fix

Review all ACID definitions and ensure the NAME field is completed. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement.

c
The CA-TSS PASSWORD(NOPW) option must not be specified for any ACID type.
IA-2 - High - CCI-000764 - V-223947 - SV-223947r877788_rule
RMF Control
IA-2
Severity
High
CCI
CCI-000764
Version
TSS0-ES-000740
Vuln IDs
  • V-223947
  • V-98601
Rule IDs
  • SV-223947r877788_rule
  • SV-107705
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25620r516240_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) DATA(PASSWORD) - NOTE: To evaluate the PASSWORD option NOPW, it must be run under the MSCA's authority, if not the information will not be generated. If PASSWORD(NOPW) is specified for any ACID types (USER, DCA, VCA, ZCA, LSCA, SCA, and MSCA), this is a finding.

Fix: F-25608r516241_fix

Review definition of all ACID types (including USER, DCA, VCA, ZCA, LSCA, SCA, and MSCA) except for structure ACIDS such as: DEPARTMENT, DIVISION, ZONE, GROUP, and PROFILE to ensure that all ACIDs specify a password. The following command is an example of how this can be corrected. TSS REPLACE(user_ACID) PASSWORD(Text4Pwd,60

a
Interactive ACIDs defined to CA-TSS must have the required fields completed.
IA-2 - Low - CCI-000764 - V-223948 - SV-223948r877789_rule
RMF Control
IA-2
Severity
Low
CCI
CCI-000764
Version
TSS0-ES-000750
Vuln IDs
  • V-223948
  • V-98603
Rule IDs
  • SV-223948r877789_rule
  • SV-107707
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25621r516243_chk

From the ISPF Command Shell enter: TSS LIST (ACIDs) DATA (BASIC,TSO,CICS) If all the fields and information listed below, are not present for all interactive users this is a finding. FIELD DESCRIPTION VALUE FACILITY Validated facilities to use BATCH, TSO, NCPASS, or other interactive Facility PASSWORD logon password must have a value INSTDATA Installation data optional PROFILE Profile(s) optional TSOLPROC Default TSO logon PROC optional for TSO users TSOLACCT Default TSO logon account may be required for a fee for service.

Fix: F-25609r516244_fix

Review all interactive ACID definitions to ensure required information is provided. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required according to the following: FIELD DESCRIPTION VALUE FACILITY Validated facilities to use BATCH, TSO, NCPASS, or other interactive Facility PASSWORD logon password must have a value INSTDATA Installation data optional PROFILE Profile(s) optional TSOLPROC Default TSO logon PROC optional for TSO users TSOLACCT Default TSO logon account may be required for a fee for service.

b
CA-TSS Batch ACID(s) submitted through RJE and NJE must be sourced.
IA-2 - Medium - CCI-000764 - V-223950 - SV-223950r877791_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
TSS0-ES-000770
Vuln IDs
  • V-223950
  • V-98607
Rule IDs
  • SV-223950r877791_rule
  • SV-107711
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25623r516249_chk

Refer to data obtained from the site installation identifying batch type ACIDs. If all static batch ACIDs (ACIDs whose passwords never change) originating from a physical reader, RJE, or NJE are sourced to those readers such as (INTRDR, N12.IR, etc.) with the appropriate source Syntax, this is not a finding.

Fix: F-25611r516250_fix

Ensure that all static batch ACIDs (ACIDs whose passwords never change) originating from a physical reader, RJE, or NJE are sourced to those readers such as (INTRDR, N12.IR, etc.) with the appropriate source Syntax. Example: TSS ADD(batch-acid) SOURCE(device) Develop a plan of action and implement the changes as specified.

b
IBM z/OS DASD management ACIDs must be properly defined to CA-TSS.
IA-2 - Medium - CCI-000764 - V-223951 - SV-223951r877792_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
TSS0-ES-000780
Vuln IDs
  • V-223951
  • V-98609
Rule IDs
  • SV-223951r877792_rule
  • SV-107713
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25624r516252_chk

Refer to data obtained from the site installation identifying DASD maintenance ACIDs. If each DASD Maintenance ACID has batch Facility, this is not a finding.

Fix: F-25612r516253_fix

Define all batch ACIDs to the BATCH facility.

b
CA-TSS user accounts must uniquely identify system users.
IA-2 - Medium - CCI-000770 - V-223952 - SV-223952r877793_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000770
Version
TSS0-ES-000790
Vuln IDs
  • V-223952
  • V-98611
Rule IDs
  • SV-223952r877793_rule
  • SV-107715
To assure individual accountability and prevent unauthorized access, organizational users must be individually identified and authenticated. A group authenticator is a generic account used by multiple individuals. Use of a group authenticator alone does not uniquely identify individual users. Examples of the group authenticator is the UNIX OS "root" user account, the Windows "Administrator" account, the "sa" account, or a "helpdesk" account. For example, the UNIX and Windows operating systems offer a "switch user" capability allowing users to authenticate with their individual credentials and, when needed, "switch" to the administrator role. This method provides for unique individual authentication prior to using a group authenticator. Users (and any processes acting on behalf of users) need to be uniquely identified and authenticated for all accesses other than those accesses explicitly identified and documented by the organization, which outlines specific user actions that can be performed on the operating system without identification or authentication. Requiring individuals to be authenticated with an individual authenticator prior to using a group authenticator allows for traceability of actions, as well as adding an additional level of protection of the actions that can be taken with group account knowledge. Satisfies: SRG-OS-000109-GPOS-00056, SRG-OS-000121-GPOS-00062, SRG-OS-000125-GPOS-00065
Checks: C-25625r516255_chk

Obtain a list of all userids that are shared among multiple users (i.e., not uniquely identified system users). If there are no shared userids on this domain, this is not a finding. If there are shared userids on this domain, this is a finding. NOTE: Userid

Fix: F-25613r516256_fix

Identify user accounts defined to the ESM that are being shared among multiple users. This may require interviews with appropriate system-level support personnel. Remove the shared user accounts from the ESM.

b
CA-TSS security administrator must develop a process to suspend userids found inactive for more than 35 days.
IA-4 - Medium - CCI-000795 - V-223953 - SV-223953r877794_rule
RMF Control
IA-4
Severity
Medium
CCI
CCI-000795
Version
TSS0-ES-000800
Vuln IDs
  • V-223953
  • V-98613
Rule IDs
  • SV-223953r877794_rule
  • SV-107717
Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potentially obtain undetected access to the system. Owners of inactive accounts will not notice if unauthorized access to their user account has been obtained. Operating systems need to track periods of inactivity and disable application identifiers after 35 days of inactivity.
Checks: C-25626r516258_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) If every user shows a LAST-USED=yy.ddd within the past "35" days, this is not a finding. NOTE: VALID FOR INTERACTIVE USERIDS, NOT VALID FOR STARTED TASK USERIDS AND BATCH USERIDS.

Fix: F-25614r516259_fix

Develop a procedure to check all userids for inactivity of more than "35" days. If found, the ISSO must suspend an account, but not delete it until it is verified by the local ISSO that the user no longer requires access. If verification is not received within "60" days, the account may be deleted.

b
The CA-TSS INACTIVE Control Option must be properly set.
IA-4 - Medium - CCI-000795 - V-223954 - SV-223954r877795_rule
RMF Control
IA-4
Severity
Medium
CCI
CCI-000795
Version
TSS0-ES-000810
Vuln IDs
  • V-223954
  • V-98615
Rule IDs
  • SV-223954r877795_rule
  • SV-107719
Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potentially obtain undetected access to the system. Owners of inactive accounts will not notice if unauthorized access to their user account has been obtained. Operating systems need to track periods of inactivity and disable application identifiers after 35 days of inactivity.
Checks: C-25627r516261_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the INACTIVE Control Option is set to a value of "0", this is not a finding.

Fix: F-25615r516262_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to set the INACTIVE Control Option to a value of "0" days and proceed with the change. The INACTIVE Control Option value is set properly with the command: TSS MODIFY INACTIVE(0)

b
The CA-TSS AUTOERASE Control Option must be set to ALL for all systems.
SC-4 - Medium - CCI-001090 - V-223955 - SV-223955r877796_rule
RMF Control
SC-4
Severity
Medium
CCI
CCI-001090
Version
TSS0-ES-000820
Vuln IDs
  • V-223955
  • V-98617
Rule IDs
  • SV-223955r877796_rule
  • SV-107721
Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from being available to any current users/roles (or current processes) that obtain access to shared system resources (e.g., registers, main memory, hard disks) after those resources have been released back to information systems. The control of information in shared resources is also commonly referred to as object reuse and residual information protection. This requirement generally applies to the design of an information technology product, but it can also apply to the configuration of particular information system components that are, or use, such products. This can be verified by acceptance/validation processes in DoD or other government agencies. There may be shared resources with configurable protections (e.g., files in storage) that may be assessed on specific information system components.
Checks: C-25628r516264_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the AUTOERASE Control Option value is set to (ALL), this is not a finding.

Fix: F-25616r516265_fix

Configure the AUTOERASE control option is set to (ALL) for all systems to erase all residual information on DASD. Evaluate the impact associated with implementation of the control option. Develop a plan of action to set the AUTOERASE control option to (ALL) for all systems and implement.

b
CA-TSS DOWN Control Option values must be properly specified.
SC-24 - Medium - CCI-001190 - V-223956 - SV-223956r877797_rule
RMF Control
SC-24
Severity
Medium
CCI
CCI-001190
Version
TSS0-ES-000830
Vuln IDs
  • V-223956
  • V-98619
Rule IDs
  • SV-223956r877797_rule
  • SV-107723
Failure to a known safe state helps prevent systems from failing to a state that may cause loss of data or unauthorized access to system resources. Operating systems that fail suddenly and with no incorporated failure state planning may leave the system available but with a reduced security protection capability. Preserving operating system state information also facilitates system restart and return to the operational mode of the organization with less disruption to mission-essential processes. Abort refers to stopping a program or function before it has finished naturally. The term abort refers to both requested and unexpected terminations.
Checks: C-25629r516267_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If only systems personnel are defined in SYS1.UADS and the DOWN Control Option values are set to DOWN(BW,SB,TN,OW), this is not a finding. If non-systems personnel are defined in SYS1.UADS and the DOWN Control Option values are set to DOWN(BW,SB,TW,OW), this is not a finding.

Fix: F-25617r516268_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified below and proceed with the change. Setting if ONLY systems personnel are defined in SYS1.UADS: DOWN(BW,SB,TN,OW) Setting if any non-systems personnel are defined in SYS1.UADS: DOWN(BW,SB,TW,OW)

c
The CA-TSS Facility Control Option must specify the sub option of MODE=FAIL.
CM-7 - High - CCI-001774 - V-223957 - SV-223957r877798_rule
RMF Control
CM-7
Severity
High
CCI
CCI-001774
Version
TSS0-ES-000840
Vuln IDs
  • V-223957
  • V-98621
Rule IDs
  • SV-223957r877798_rule
  • SV-107725
Utilizing a whitelist provides a configuration management method for allowing the execution of only authorized software. Using only authorized software decreases risk by limiting the number of potential vulnerabilities. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whitelisting. Verification of white-listed software occurs prior to execution or at system startup. This requirement applies to operating system programs, functions, and services designed to manage system processes and configurations (e.g., group policies).
Checks: C-25630r516270_chk

From the ISPF Command Shell enter: TSS MODIFY(FACILITY(ALL)) If the Facility Control Option does not specifies the sub option of "MODE=FAIL" for all facilities, this is a finding.

Fix: F-25618r516271_fix

Evaluate the impact associated with implementation of the Facility Control Option MODE sub-option. Develop a plan of action to implement the Facility Control Option MODE sub-option setting to "MODE=FAIL" and proceed with the change.

b
CA-TSS ACID creation must use the EXP option.
IA-5 - Medium - CCI-002041 - V-223958 - SV-223958r877799_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-002041
Version
TSS0-ES-000850
Vuln IDs
  • V-223958
  • V-98623
Rule IDs
  • SV-223958r877799_rule
  • SV-107727
Without providing this capability, an account may be created without a password. Non-repudiation cannot be guaranteed once an account is created if a user is not forced to change the temporary password upon initial logon. Temporary passwords are typically used to allow access when new accounts are created or passwords are changed. It is common practice for administrators to create temporary passwords for user accounts which allow the users to log on, yet force them to change the password once they have successfully authenticated.
Checks: C-25631r516273_chk

Ask the system administrator for the procedures for creating new ACIDs. If the procedure contains the "EXP" option, this is not a finding.

Fix: F-25619r516274_fix

Assure procedures to create New Acids include the "EXP" option. Example: TSS CREATE(USER02) NAME('ANDY POE') TYPE(USER) DEPARTMENT(PAYDEPT) PASSWORD(INITIAL,60,EXP) FACILITY(TSO)

b
The CA-TSS SUBACID Control Option must be set to U,8.
AC-6 - Medium - CCI-002233 - V-223959 - SV-223959r877800_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002233
Version
TSS0-ES-000860
Vuln IDs
  • V-223959
  • V-98625
Rule IDs
  • SV-223959r877800_rule
  • SV-107729
In certain situations, software applications/programs need to execute with elevated privileges to perform required functions. However, if the privileges required for execution are at a higher level than the privileges assigned to organizational users invoking such applications/programs, those users are indirectly provided with greater privileges than assigned by the organizations. Some programs and processes are required to operate at a higher privilege level and therefore should be excluded from the organization-defined software list after review.
Checks: C-25632r516276_chk

From this ISPF Command Shell enter: TSS MODIFY STATUS If the SUBACID Control Option values are NOT set to "SUBACID(U,8)", this is a finding.

Fix: F-25620r516277_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting to "SUBACID(U,8)", and proceed with the change.

b
CA-TSS must use propagation control to eliminate ACID inheritance.
AC-6 - Medium - CCI-002233 - V-223960 - SV-223960r877801_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002233
Version
TSS0-ES-000870
Vuln IDs
  • V-223960
  • V-98627
Rule IDs
  • SV-223960r877801_rule
  • SV-107731
In certain situations, software applications/programs need to execute with elevated privileges to perform required functions. However, if the privileges required for execution are at a higher level than the privileges assigned to organizational users invoking such applications/programs, those users are indirectly provided with greater privileges than assigned by the organizations. Some programs and processes are required to operate at a higher privilege level and therefore should be excluded from the organization-defined software list after review.
Checks: C-25633r516279_chk

From the ISPF Command Shell enter: TSS MODIFY FACILITY(ALL) enter TSS MODIFY FACILITY(&lt;FACILITY&gt;) If no Facility is defined with both the "MULTIUSER" and "ASUBM" attributes further analysis is not needed. For each Facility with "MULTIUSER" and "ASUBM" attribute, review the @ACIDS report to determine which ACID(s) has (have) the following: -A Master Facility of the Facility with "MULTIUSER" and "ASUBM" attribute, and, -The Facility of "BATCH" If each ACID that has the Master Facility of the Facility with "MULTIUSER" and "ASUBM" attribute and the Facility of "BATCH" is defined to the "PROPCNTL" resource class, this is not a finding.

Fix: F-25621r516280_fix

Ensure an associated ACID exists for all batch jobs and propagation control is being used. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as required. The following Example shows the CONTROL-M STC ACID being owned to the PROPCNTL resource class: TSS ADD(deptacid) PROPCNTL(control-m-acid)

b
IBM z/OS scheduled production batch ACIDs must specify the CA-TSS BATCH Facility, and the Batch Job Scheduler must be authorized to the Scheduled production CA-TSS batch ACID.
AC-6 - Medium - CCI-002233 - V-223961 - SV-223961r877802_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002233
Version
TSS0-ES-000880
Vuln IDs
  • V-223961
  • V-98629
Rule IDs
  • SV-223961r877802_rule
  • SV-107733
In certain situations, software applications/programs need to execute with elevated privileges to perform required functions. However, if the privileges required for execution are at a higher level than the privileges assigned to organizational users invoking such applications/programs, those users are indirectly provided with greater privileges than assigned by the organizations. Some programs and processes are required to operate at a higher privilege level and therefore should be excluded from the organization-defined software list after review.
Checks: C-25634r516282_chk

Refer to the documentation of the processes used for submission of batch jobs via an automated process (i.e., scheduler or other sources) and each of the associated userids. Ensure that each identified batch ACID is sourced to a specific submission process used only for batch processing. If the following guidance is true, this is not a finding. -The job scheduler is cross-authorized to the batch ACIDs. -The Facility of BATCH is specified for each batch ACID. -Batch ACIDs with facilities other than BATCH should be questioned to ensure they are truly used for batch processing only, especially if a non-expiring password is used. -The batch ACIDS may have the NOSUSPEND attribute.

Fix: F-25622r516283_fix

Ensure associated ACIDs exist for all batch jobs and documentation justifying access to system resources is maintained and filed with the ISSO. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the required changes.

b
CA-TSS ADMINBY Control Option must be set to ADMINBY.
AC-6 - Medium - CCI-002234 - V-223962 - SV-223962r877803_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002234
Version
TSS0-ES-000890
Vuln IDs
  • V-223962
  • V-98631
Rule IDs
  • SV-223962r877803_rule
  • SV-107735
Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and identify the risk from insider threats and the advanced persistent threat.
Checks: C-25635r516285_chk

From ISPF Command Shell enter: TSS MODIFY STATUS If the ADMINBY Control Option value is not set or set to "NOADMBY", this is a finding.

Fix: F-25623r516286_fix

Ensure ADMINBY control option is set to "ADMINBY" to record who when and where information in the ACID security record for administrative changes. Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting "ADMINBY" and proceed with the change.

b
CA-TSS LOG Control Option must be set to (SMF,INIT, SEC9, MSG).
AC-6 - Medium - CCI-002234 - V-223963 - SV-223963r877804_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002234
Version
TSS0-ES-000900
Vuln IDs
  • V-223963
  • V-98633
Rule IDs
  • SV-223963r877804_rule
  • SV-107737
Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and identify the risk from insider threats and the advanced persistent threat.
Checks: C-25636r516288_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the LOG Control Option is NOT set to (SMF,INIT, SEC9, MSG), this is a finding.

Fix: F-25624r516289_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified below and proceed with the change. LOG(SMF,INIT, SEC9, MSG)

b
CA-TSS MSCA ACID password changes must be documented in the change log.
AC-6 - Medium - CCI-002234 - V-223964 - SV-223964r877805_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002234
Version
TSS0-ES-000910
Vuln IDs
  • V-223964
  • V-98635
Rule IDs
  • SV-223964r877805_rule
  • SV-107739
Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and identify the risk from insider threats and the advanced persistent threat.
Checks: C-25637r516291_chk

From ISPF Command Shell enter: Exec the CA-TSS TSSAUDIT Utility using CHANGES Control Statement. Note: If running Quest NC-Pass, validate that the MSCA ACID has the FACILITY of NCPASS and SECURID resource in the ABSTRACT resource class. If the MSCA password changes are documented in the change log, this is not a finding.

Fix: F-25625r516292_fix

Ensure that the MSCA password changes are documented with comments in the TSS Recovery file. The TSS Recovery file will be of sufficient size to ensure that the change is documented.

b
The IBM z/OS IEASYMUP resource must be protected in accordance with proper security requirements.
AC-6 - Medium - CCI-002235 - V-223965 - SV-223965r877806_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
TSS0-ES-000920
Vuln IDs
  • V-223965
  • V-98637
Rule IDs
  • SV-223965r877806_rule
  • SV-107741
Privileged functions include, for example, establishing accounts, performing system integrity checks, or administering cryptographic key management activities. Non-privileged users are individuals that do not possess appropriate authorizations. Circumventing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users.
Checks: C-25638r516294_chk

From the ISPF Command Shell enter: TSS WHOOWNS IBMFAC(IEASYMUP) If the TSS resources are owned or DEFPROT is specified for the resource class, this is not a finding. Enter TSS WHOHAS IBMFAC(IEASYMUP) If TSS resource access authorizations restrict UPDATE and/or greater access to DASD administrators, Tape Library personnel, and system programming personnel, this is not a finding.

Fix: F-25626r516295_fix

Ensure that the System level symbolic resources are defined to the FACILITY resource class and protected. UPDATE access to the System level symbolic resources are limited to System Programmers, DASD Administrators, and/or Tape Library personnel. All access is logged. Ensure the guidelines for the resources and/or generic equivalent are followed. Limit access to the IEASYMUP resources to above personnel with UPDATE and/or greater access. The following commands are provided as a sample for implementing resource controls: TSS ADD(ADMIN) IBMFAC(IEASYMUP) TSS PERMIT(<dasdsmpl>) IBMFAC(IEASYMUP) ACC(U) ACTION(AUDIT) TSS PERMIT(<syspsmpl>) IBMFAC(IEASYMUP) ACC(U) ACTION(AUDIT) TSS PERMIT(<tapesmpl>) IBMFAC(IEASYMUP) ACC(U) ACTION(AUDIT)

b
CA-TSS Default ACID must be properly defined.
AC-6 - Medium - CCI-002235 - V-223966 - SV-223966r877807_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
TSS0-ES-000930
Vuln IDs
  • V-223966
  • V-98639
Rule IDs
  • SV-223966r877807_rule
  • SV-107743
Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges.
Checks: C-25639r516297_chk

From the ISPF Command Shell enter: TSS LIST STC If *DEF* has action of *FAIL* this is not a finding. If the default ACID is defined enter: TSS List(&lt;defined ACID&gt;) If the ACID has no access to resources and no facility access and sourced to the internal reader, this is not a finding. If any of the above is untrue, this is a finding.

Fix: F-25627r516298_fix

Ensure the default STC ACID is defined in accordance with the following restrictions. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes as specified. All STCs not defined to TSS will fail upon initiation. The following command may be used to associate all undefined STCs with a default action of FAIL: TSS ADD(STC) PROCNAME(DEFAULT) ACID(FAIL) If a valid requirement exists to establish a default STC, the following restrictions also apply: a. The ISSO will maintain the written request, justification, and authorization. b. The STC's ACID will have no other facilities permitted to it. c. The STC's ACID will have a permission of DSN(*****) ACCESS(NONE). TSS PERMIT(stc-acid) DSN(*****) ACCESS(NONE) d. The STC's ACID will not have any permission to the resources available to TSS. e. The STC's ACID will be sourced to the internal reader: ADD(stc-acid) SOURCE(INTRDR) f. An entry will be made in the STC table identifying the default ACID name as follows ("stc-acid" site defined): TSS ADD(STC) PROCNAME(DEFAULT) ACID(stc-acid)

c
The CA-TSS BYPASS attribute must be limited to trusted STCs only.
AC-6 - High - CCI-002235 - V-223967 - SV-223967r877808_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
TSS0-ES-000940
Vuln IDs
  • V-223967
  • V-98641
Rule IDs
  • SV-223967r877808_rule
  • SV-107745
Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileged functions include, for example, establishing accounts, performing system integrity checks, or administering cryptographic key management activities. Non-privileged users are individuals that do not possess appropriate authorizations. Circumventing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users.
Checks: C-25640r516300_chk

From the ISPF Command Shell enter: TSS LIST(STC) If only STCs listed as trusted in the IBM z/OS MVS Initialization and Tuning Reference are granted the BYPASS privilege, this is not a finding. Guidelines for reference: Assign the TRUSTED attribute when one of the following conditions applies: -The started procedure or address space creates or accesses a wide variety of unpredictably named data sets within your installation. -Insufficient authority to an accessed resource might risk an unsuccessful IPL or other system problem. -Avoid assigning TRUSTED to a z/OS started procedure or address space unless it is listed here or you are instructed to do so by the product documentation. Additionally external security managers are candidates for trusted attribute. Any other started tasks not listed or not covered by the guidelines are a finding unless approval by the Authorizing Official AO.

Fix: F-25628r516301_fix

Review the STC record for ACIDs with the BYPASS attribute. Ensure only those trusted STCs that are listed in the IBM z/OS MVS Initialization and Tuning Reference, have been granted this authority. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes. Trusted STCs: While the actual list may vary based on local site requirements and software configuration, the started tasks listed in the IBM z/OS MVS Initialization and Tuning Reference is an approved list of started tasks that may be considered trusted started procedures. Guidelines for reference: Assign the TRUSTED attribute when one of the following conditions applies: -The started procedure or address space creates or accesses a wide variety of unpredictably named data sets within your installation. -Insufficient authority to an accessed resource might risk an unsuccessful IPL or other system problem. -Avoid assigning TRUSTED to a z/OS started procedure or address space unless it is listed here or you are instructed to do so by the product documentation. Additionally external security managers are candidates for trusted attribute. Any other started tasks not; listed or not covered by the guidelines are a finding unless approval by the Authorizing Official AO.

b
CA-TSS MSCA ACID must perform security administration only.
AC-6 - Medium - CCI-002235 - V-223968 - SV-223968r877809_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
TSS0-ES-000950
Vuln IDs
  • V-223968
  • V-98643
Rule IDs
  • SV-223968r877809_rule
  • SV-107747
Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileged functions include, for example, establishing accounts, performing system integrity checks, or administering cryptographic key management activities. Non-privileged users are individuals that do not possess appropriate authorizations. Circumventing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users.
Checks: C-25641r868959_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) DATA(ALL,PA) TYPE(SCA) If the MSCA ACID has access limited to performing security administration functions only, this is not a finding. Below is an example of allowed setup for MSCA account and authorities. "MSCA" as the Accessorid is merely an example here, which is site determined. List is not all inclusive. The primary SCA for the domain will be listed within the "NAME" field since they are responsible for the MSCA ACID. ACCESSORID = MSCA NAME = "primary SCA" TYPE = MASTER FACILITY = BATCH PROFILES = SECURID ATTRIBUTES = AUDIT,CONSOLE,NOATS data set = %. *. data set = ***** +. VOLUMES = *(G) XA data set = SYS3.TSS.BACKUP ACCESS = UPDATE ACTION = AUDIT ----------- ADMINISTRATION AUTHORITIES RESOURCE = *ALL* ACCESS = ALL ACID = *ALL* FACILITIES = *ALL* LIST DATA = *ALL*,PROFILES,PASSWORD,SESSKEY MISC1 = *ALL* MISC2 = *ALL* MISC4 = *ALL* MISC8 = *ALL* MISC9 = *ALL* NOTE 1: Update access to the backup security database is required by the MSCA account anytime the ISSO needs to run/submit the TSS Utility called TSSFAR. MSCA account may from time to time be required to have additional access for the period of project such as Extending the Security Database. NOTE 2: MSCA account must be used for such items as: TSSFAR, EXTENDING Security Database, creating SCA/LSCA accounts, working with LSCA accounts (scoping, admin rights, etc.). Most often the ISSO staff will utilize their normal SCA account. The MSCA account will not be anyone's primary security administrative account.

Fix: F-25629r868960_fix

The ISSO will review the MSCA and ensure access granted is limited to those resources necessary to support the security administration function. Evaluate the impact of correcting the deficiency and develop a plan of action to implement the changes. Below is an example of allowed setup for MSCA account and authorities. "MSCA" as the Accessorid is merely an example here, which is site determined. List is not all inclusive. The primary SCA for the domain will be listed within the "NAME" field since they are responsible for the MSCA ACID. ACCESSORID = MSCA NAME = "primary SCA" TYPE = MASTER FACILITY = BATCH PROFILES = SECURID ATTRIBUTES = AUDIT,CONSOLE,NOATS data set = %. *. data set = ***** +. VOLUMES = *(G) XA data set = SYS3.TSS.BACKUP ACCESS = UPDATE ACTION = AUDIT ----------- ADMINISTRATION AUTHORITIES RESOURCE = *ALL* ACCESS = ALL ACID = *ALL* FACILITIES = *ALL* LIST DATA = *ALL*,PROFILES,PASSWORD,SESSKEY MISC1 = *ALL* MISC2 = *ALL* MISC4 = *ALL* MISC8 = *ALL* MISC9 = *ALL* NOTE 1: Update access to the backup security database is required by the MSCA account anytime the ISSO needs to run/submit the TSS Utility called TSSFAR. MSCA account may from time to time be required to have additional access for the period of project such as Extending the Security Database. NOTE 2: MSCA account must be used for such items as: TSSFAR, EXTENDING Security Database, creating SCA/LSCA accounts, working with LSCA accounts (scoping, admin rights, etc). Most often the ISSO staff will utilize their normal SCA account. The MSCA account will not be anyone's primary security administrative account. NOTE 3: MSCA account must be limited in access, to least privileged access of resources required to function. NOTE 4: If running Quest NC-Pass, validate in ZNCP0020 that the MSCA ACID has the FACILITY of NCPASS and SECURID resource in the ABSTRACT resource class.

c
CA-TSS ACIDs granted the CONSOLE attribute must be justified.
AC-6 - High - CCI-002235 - V-223969 - SV-223969r877810_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
TSS0-ES-000960
Vuln IDs
  • V-223969
  • V-98645
Rule IDs
  • SV-223969r877810_rule
  • SV-107749
Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileged functions include, for example, establishing accounts, performing system integrity checks, or administering cryptographic key management activities. Non-privileged users are individuals that do not possess appropriate authorizations. Circumventing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users.
Checks: C-25642r516306_chk

Execute TSS Report TSS AUDIT with PRIVILEGES control statement PRIVILEGES [SHORT]. For more information TSSAUDIT reports refer to the CA-TSS Report and Tracking Guide. Refer to the resulting report. If ACIDs with CONSOLE authority are limited to authorized SCA security administrators and the system programmers that maintain the CA-TSS software product only, this is not a finding.

Fix: F-25630r516307_fix

Review all ACIDs with the CONSOLE attribute. Ensure access is limited to authorized SCA security administrators only. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes. Ensure documentation providing justification for access is maintained and filed with the ISSO.

b
CA-TSS ACIDs defined as security administrators must have the NOATS attribute.
AC-6 - Medium - CCI-002235 - V-223970 - SV-223970r877811_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
TSS0-ES-000970
Vuln IDs
  • V-223970
  • V-98647
Rule IDs
  • SV-223970r877811_rule
  • SV-107751
Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileged functions include, for example, establishing accounts, performing system integrity checks, or administering cryptographic key management activities. Non-privileged users are individuals that do not possess appropriate authorizations. Circumventing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users.
Checks: C-25643r516309_chk

Execute TSS Report TSS AUDIT with PRIVILEGES control statement PRIVILEGES [SHORT]. For more information TSSAUDIT reports refer to the CA-TSS Report and Tracking Guide. Refer to the resulting report. If all security administrators have the "NOATS" attribute, this is not a finding.

Fix: F-25631r516310_fix

Review all security administrator ACIDs. Ensure the "NOATS" attribute has been assigned. Evaluate the impact of correcting the deficiency. Develop a plan of action and implement the changes. NOTE: The NOATS attribute may be added to an ACID or an ACID's PROFILE. The following command may be issued to determine if the NOATS attribute is defined to an ACID or an ACID's PROFILE: tss list(<acid>) data(basic,profile)

b
The CA-TSS PTHRESH Control Option must be properly set.
AC-7 - Medium - CCI-002238 - V-223971 - SV-223971r877812_rule
RMF Control
AC-7
Severity
Medium
CCI
CCI-002238
Version
TSS0-ES-000980
Vuln IDs
  • V-223971
  • V-98649
Rule IDs
  • SV-223971r877812_rule
  • SV-107753
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account.
Checks: C-25644r516312_chk

From the ISPF Command Shell enter: TSS MODIFY STATUS If the PTHRESH Control Option value is not set to "PTHRESH(2)", this is a finding.

Fix: F-25632r516313_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified following and proceed with the change. PTHRESH(2)

b
CA-TSS VTHRESH Control Option values specified must be set to (10,NOT,CAN).
AC-12 - Medium - CCI-002361 - V-223972 - SV-223972r877813_rule
RMF Control
AC-12
Severity
Medium
CCI
CCI-002361
Version
TSS0-ES-000990
Vuln IDs
  • V-223972
  • V-98651
Rule IDs
  • SV-223972r877813_rule
  • SV-107755
Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of network connections that are associated with communications sessions (i.e., network disconnect). A logical session (for local, network, and remote access) is initiated whenever a user (or process acting on behalf of a user) accesses an organizational information system. Such user sessions can be terminated (and thus terminate user access) without terminating network sessions. Session termination terminates all processes associated with a user's logical session except those processes that are specifically created by the user (i.e., session owner) to continue after the session is terminated. Conditions or trigger events requiring automatic session termination can include, for example, organization-defined periods of user inactivity, targeted responses to certain types of incidents, and time-of-day restrictions on information system use. This capability is typically reserved for specific operating system functionality where the system owner, data owner, or organization requires additional assurance.
Checks: C-25645r516315_chk

From the ISPF Control Shell enter: TSS MODIFY STATUS If the VTHRESH Control Option values are not set to "VTHRRESH(10,NOT,CAN)", this is a finding.

Fix: F-25633r516316_fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting to "VTHRESH(10,NOT,CAN)", and proceed with the change.

b
IBM z/OS FTP.DATA configuration statements must have a proper banner statement with the Standard Mandatory DoD Notice and Consent Banner.
AC-8 - Medium - CCI-000048 - V-223973 - SV-223973r877814_rule
RMF Control
AC-8
Severity
Medium
CCI
CCI-000048
Version
TSS0-FT-000010
Vuln IDs
  • V-223973
  • V-98653
Rule IDs
  • SV-223973r877814_rule
  • SV-107757
Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000024-GPOS-00007
Checks: C-25646r516318_chk

Refer to the FTP.DATA file specified on the SYSFTPD DD statement in the FTP started task JCL. The SYSFTPD DD statement is optional. The search order for FTP.DATA is: /etc/ftp.data SYSFTPD DD statement jobname.FTP.DATA SYS1.TCPPARMS(FTPDATA) tcpip.FTP.DATA Examine the BANNER statement. If the BANNER statement in the FTP Data configuration file specifies an HFS file or data set that contains a logon banner, this is not a finding. The below banner is mandatory and deviations are not permitted except as authorized in writing by the DoD Chief Information Officer. The thrust of this new policy is to make it clear that there is no expectation of privacy when using DoD information systems and all use of DoD information systems is subject to searching, auditing, inspecting, seizing, and monitoring, even if some personal use of a system is permitted: STANDARD MANDATORY DOD NOTICE AND CONSENT BANNER You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details.

Fix: F-25634r516319_fix

Ensure the BANNER statement in the FTP Data configuration file specifies an HFS file or z/OS data set that contains a logon banner. The below banner is mandatory and deviations are not permitted except as authorized in writing by the DoD Chief Information Officer. The thrust of this new policy is to make it clear that there is no expectation of privacy when using DoD information systems and all use of DoD information systems is subject to searching, auditing, inspecting, seizing, and monitoring, even if some personal use of a system is permitted: STANDARD MANDATORY DOD NOTICE AND CONSENT BANNER You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG authorized purpose.

b
IBM z/OS SMF recording options for the FTP server must be configured to write SMF records for all eligible events.
AC-17 - Medium - CCI-000067 - V-223974 - SV-223974r877815_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-000067
Version
TSS0-FT-000020
Vuln IDs
  • V-223974
  • V-98655
Rule IDs
  • SV-223974r877815_rule
  • SV-107759
Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Automated monitoring of remote access sessions allows organizations to detect cyberattacks and also ensure ongoing compliance with remote access policies by auditing connection activities of remote access capabilities, such as Remote Desktop Protocol (RDP), on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets). Satisfies: SRG-OS-000032-GPOS-00013, SRG-OS-000392-GPOS-00172
Checks: C-25647r516321_chk

If FTPDATA is configured with the following SMF statements, this is not a finding. FTP.DATA Configuration Statements SMF TYPE119 SMFJES TYPE119 SMFSQL TYPE119 SMFAPPE [Not coded or commented out] SMFDEL [Not coded or commented out] SMFEXIT [Not coded or commented out] SMFLOGN [Not coded or commented out] SMFREN [Not coded or commented out] SMFRETR [Not coded or commented out] SMFSTOR [Not coded or commented out]

Fix: F-25635r868962_fix

Configure SMF options to conform to the specifications in the FTPDATA Configuration Statements below or that they are commented out. SMF TYPE119 SMFJES TYPE119 SMFSQL TYPE119 SMFAPPE [Not coded or commented out] SMFDEL [Not coded or commented out] SMFEXIT [Not coded or commented out] SMFLOGN [Not coded or commented out] SMFREN [Not coded or commented out] SMFRETR [Not coded or commented out] SMFSTOR [Not coded or commented out] The FTP Server can provide audit data in the form of SMF records. SMF record type 119, the TCP/IP Statistics record, can be written with the following subtypes: 70 - Append 70 - Delete and Multiple Delete 72 - Invalid Logon Attempt 70 - Rename 70 - Get (Retrieve) and Multiple Get 70 - Put (Store and Store Unique) and Multiple Put SMF data produced by the FTP Server provides transaction information for both successful and unsuccessful FTP commands. This data may provide valuable information for security audit activities. Type 119 records use a more standard format and provide more information.

b
CA-TSS permission bits and user audit bits for HFS objects that are part of the FTP server component must be properly configured.
AC-3 - Medium - CCI-000213 - V-223975 - SV-223975r877816_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-FT-000030
Vuln IDs
  • V-223975
  • V-98657
Rule IDs
  • SV-223975r877816_rule
  • SV-107761
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25648r516324_chk

From the ISPF Command Shell enter: omvs At the input line enter: cd /usr/sbin/ enter ls -alW If the following File permission and user Audit Bits are true, this is not a finding. /usr/sbin/ftpd 1740 fff /usr/sbin/ftpdns 1755 fff /usr/sbin/tftpd 0644 faf cd ls -alW If the following file permission and user Audit Bits are true, this is not a finding. /etc/ftp.data 0744 faf /etc/ftp.banner 0744 faf NOTES: Some of the files listed above are not used in every configuration. The absence of a file is not considered a finding. The /usr/sbin/ftpd and /usr/sbin/ftpdns objects are symbolic links to /usr/lpp/tcpip/sbin/ftpd and /usr/lpp/tcpip/sbin/ftpdns respectively. The permission and user audit bits on the targets of the symbolic links must have the required settings. The /etc/ftp.data file may not be the configuration file the server uses. It is necessary to check the SYSFTPD DD statement in the FTP started task JCL to determine the actual file. The TFTP Server does not perform any user identification or authentication, allowing any client to connect to the TFTP Server. Due to this lack of security, the TFTP Server will not be used. The TFTP Client is not secured from use. The permission bits for /usr/sbin/tftpd should be set to 644. The /etc/ftp.banner file may not be the banner file the server uses. It is necessary to check the BANNER statement in the FTP Data configuration file to determine the actual file. Also, the permission bit setting for this file must be set as indicated in the table above. A more restrictive set of permissions is not permitted. The following represents a hierarchy for permission bits from least restrictive to most restrictive: 7 rwx (least restrictive) 6 rw- 3 -wx 2 -w- 5 r-x 4 r-- 1 --x 0 --- (most restrictive) The possible audit bits settings are as follows: f log for failed access attempts a log for failed and successful access - no auditing

Fix: F-25636r516325_fix

With the assistance of a systems programmer with UID(0) and/or SUPERUSER access, configure the UNIX permission bits and user audit bits on the HFS directories and files for the FTP Server to conform to the specifications in the table below: FTP Server HFS Object Security Settings File Permission Bits User Audit Bits /usr/sbin/ftpd 1740 fff /usr/sbin/ftpdns 1755 fff /usr/sbin/tftpd 0644 faf /etc/ftp.data 0744 faf /etc/ftp.banner 0744 faf The /usr/sbin/ftpd and /usr/sbin/ftpdns objects are symbolic links to /usr/lpp/tcpip/sbin/ftpd and /usr/lpp/tcpip/sbin/ftpdns respectively. The permission and user audit bits on the targets of the symbolic links must have the required settings. The TFTP Server does not perform any user identification or authentication, allowing any client to connect to the TFTP Server. Due to this lack of security, the TFTP Server will not be used. The TFTP Client is not secured from use. The /etc/ftp.data file may not be the configuration file the server uses. It is necessary to check the SYSFTPD DD statement in the FTP started task JCL to determine the actual file. The /etc/ftp.banner file may not be the banner file the server uses. It is necessary to check the BANNER statement in the FTP Data configuration file to determine the actual file. The following represents a hierarchy for permission bits from least restrictive to most restrictive: 7 rwx (least restrictive) 6 rw- 3 -wx 2 -w- 5 r-x 4 r-- 1 --x 0 --- (most restrictive) The possible audit bits settings are as follows: f log for failed access attempts a log for failed and successful access - no auditing Some of the files listed above (e.g., /etc/ftp.data) are not used in every configuration. While the absence of a file is generally not a security issue, the existence of a file that has not been properly secured can often be an issue. Therefore, all files that do exist should have the specified permission and audit bit settings. The following commands can be used (from a user account with an effective UID(0)) to update the permission bits and audit bits: chmod 1740 /usr/lpp/tcpip/sbin/ftpd chaudit rwx=f /usr/lpp/tcpip/sbin/ftpd chmod 1755 /usr/lpp/tcpip/sbin/ftpdns chaudit rwx=f /usr/lpp/tcpip/sbin/ftpdns chmod 0744 /etc/ftp.data chaudit w=sf,rx+f /etc/ftp.data chmod 0744 /etc/ftp.banner chaudit w=sf,rx+f /etc/ftp.banner

b
IBM z/OS data sets for the FTP server must be properly protected.
AC-3 - Medium - CCI-000213 - V-223976 - SV-223976r877817_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-FT-000040
Vuln IDs
  • V-223976
  • V-98659
Rule IDs
  • SV-223976r877817_rule
  • SV-107763
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25649r516327_chk

If WRITE and ALLOCATE access to the data set containing the FTP Data configuration file is restricted to systems programming personnel this is not a finding. Note: READ access to all authenticated users is permitted. If WRITE and ALLOCATE access to the data set containing the FTP Data configuration file is logged this is not a finding. If WRITE and ALLOCATE access to the data set containing the FTP banner file is restricted to systems programming personnel this is not a finding. Note: READ access to the data set containing the FTP banner file is permitted to all authenticated users. Notes: The MVS data sets mentioned above are not used in every configuration. Absence of a data set will not be considered a finding. The data set containing the FTP Data configuration file is determined by checking the SYSFTPD DD statement in the FTP started task JCL. The data set containing the FTP banner file is determined by checking the BANNER statement in the FTP Data configuration file.

Fix: F-25637r516328_fix

Review the data set access authorizations defined to the ACP for the FTP.DATA and FTP.BANNER files. Configure these data sets to be protected as follows:

b
IBM z/OS FTP Control cards must be properly stored in a secure PDS file.
IA-5 - Medium - CCI-000202 - V-223977 - SV-223977r877818_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000202
Version
TSS0-FT-000050
Vuln IDs
  • V-223977
  • V-98661
Rule IDs
  • SV-223977r877818_rule
  • SV-107765
Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25650r516330_chk

Ask the System administrator fora list(s) of the locations for all FTP Control cards within a given application/AIS, ensuring no FTP control cards are within in-stream JCL, JCL libraries or any open access data sets. If access to PDS files where FTP Control cards are stored are not restricted to appropriate personnel this is a finding.

Fix: F-25638r516331_fix

Make sure that the FTP control Cards for each FTP are stored in a secure PDS and that they are not placed in the JCL libraries or in the in-stream JCL for each FTP.

b
IBM z/OS user exits for the FTP server must not be used without proper approval and documentation.
CM-7 - Medium - CCI-000382 - V-223978 - SV-223978r877819_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000382
Version
TSS0-FT-000060
Vuln IDs
  • V-223978
  • V-98663
Rule IDs
  • SV-223978r877819_rule
  • SV-107767
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Checks: C-25651r868964_chk

Refer to the Data configuration file specified on the SYSFTPD DD statement in the FTP started task JCL. Refer to the file(s) allocated by the STEPLIB DD statement in the FTP started task JCL. Refer to the libraries specified in the system Linklist and LPA. If any FTP Server exits are in use, identify them and validate that they were reviewed for integrity and approved by the site AO. Refer to the following items are in effect for FTP Server user exits: The FTCHKCMD, FTCHKIP, FTCHKJES, FTCHKPWD, FTPSMFEX and FTPOSTPR modules are not located in the FTP daemon's STEPLIB, Linklist, or LPA. NOTE: The ISPF ISRFIND utility can be used to search the system Linklist and LPA for specific modules. If both of the above are true, this is not a finding. If any FTP Server user exits are implemented and the site has not had the site systems programmer verify the exit was securely written and installed, this is a finding.

Fix: F-25639r516334_fix

Review the configuration statements in the FTP.DATA file. Review the FTP daemon STEPLIB, system Linklist, and Link Pack Area libraries. If FTP Server exits are enabled or present, and have not been approved by the site ISSM and not securely written and implemented by the site systems programmer, they should not be installed. Verify that none of the following exits are installed unless they have met the requirements listed above: FTCHKCMD FTCHKIP FTCHKJES FTCHKPWD FTPOSTPR FTPSMFEX

b
The IBM z/OS FTP server daemon must be defined with proper security parameters.
IA-2 - Medium - CCI-000764 - V-223979 - SV-223979r877820_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
TSS0-FT-000070
Vuln IDs
  • V-223979
  • V-98665
Rule IDs
  • SV-223979r877820_rule
  • SV-107769
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25652r868966_chk

From the ISPD Command Shell enter: TSS LIST(FTPD) SEGMENT(OMVS) NOTE: The JCL member is typically named FTPD If the FTPD ACID has the STC facility, this is not a finding. If the FTPD ACID has the following z/OS UNIX attributes, this is not a finding. UID(0), HOME directory '/', shell program /bin/sh.

Fix: F-25640r868967_fix

Configure FTP daemon with the following items: -The FTP daemon is started from a JCL procedure library defined to JES2. NOTE: The JCL member is typically named FTPD. -The FTP daemon ACID is FTPD. -The FTPD ACID has the STC facility. -The FTPD ACID has the following z/OS UNIX attributes: UID(0), HOME directory '/', shell program /bin/sh. For example: TSS CREATE(FTPD) TYPE(USER) NAME(FTPD) DEPT(existing-dept) FACILITY(STC) PASSWORD(password,0) TSS ADD(FTPD) DFLTGRP(STCTCPX) GROUP(STCTCPX) TSS ADD(FTPD) SOURCE(INTRDR) TSS ADD(FTPD) UID(0) HOME(/) OMVSPGM(/bin/sh) TSS ADD(FTPD) MASTFAC(TCP) TSS ADD(STC) PROCNAME(FTPD) ACID(FTPD) TSS PERMIT(FTPD) IBMFAC(BPX.DAEMON) ACCESS(READ) TSS PERMIT(FTPD) IBMFAC(BPX.POE) ACCESS(READ) TSS PERMIT(FTPD) SERVAUTH(EZB.STACKACCESS.)ACCESS(READ)

b
IBM z/OS FTP.DATA configuration for the FTP server must have the INACTIVE statement properly set.
SC-10 - Medium - CCI-001133 - V-223980 - SV-223980r877821_rule
RMF Control
SC-10
Severity
Medium
CCI
CCI-001133
Version
TSS0-FT-000080
Vuln IDs
  • V-223980
  • V-98667
Rule IDs
  • SV-223980r877821_rule
  • SV-107771
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session will also free up resources committed by the managed network element.
Checks: C-25653r516339_chk

Refer to the file specified on the SYSFTPD DD statement in the FTP started task JCL. If the INACTIVE statement is coded with a value greater than "600", this is a finding. If the INACTIVE statement is coded with a value of "0", this is a finding. If there is no INACTIVE statement coded or the INACTIVE statement is commented out, this is a finding.

Fix: F-25641r516340_fix

Code the FTPD configuration file to include the INACTIVE statement with a value between "1" and "600".

b
IBM z/OS startup parameters for the FTP server must have the INACTIVE statement properly set.
SC-10 - Medium - CCI-001133 - V-223981 - SV-223981r877822_rule
RMF Control
SC-10
Severity
Medium
CCI
CCI-001133
Version
TSS0-FT-000090
Vuln IDs
  • V-223981
  • V-98669
Rule IDs
  • SV-223981r877822_rule
  • SV-107773
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session will also free up resources committed by the managed network element. Terminating network connections associated with communications sessions includes, for example, de-allocating associated TCP/IP address/port pairs at the operating system level, and de-allocating networking assignments at the application level if multiple application sessions are using a single operating system-level network connection. This does not mean that the operating system terminates all sessions or network access; it only ends the inactive session and releases the resources associated with that session.
Checks: C-25654r868969_chk

Refer to the Profile configuration file specified on the PROFILE DD statement in the TCPIP started task JCL. If all the items below are true, this is not a finding. If any of the items below are untrue, this is a finding. The following items are in effect for the FTP daemon's started task JCL: -The SYSTCPD and SYSFTPD DD statements specify the TCP/IP Data and FTP Data configuration files respectively. -The ANONYMOUS keyword is not coded on the PARM parameter on the EXEC statement. -The ANONYMOUS=logonid combination is not coded on the PARM parameter on the EXEC statement. -The INACTIVE keyword is not coded on the PARM parameter on the EXEC statement. The AUTOLOG statement block can be configured to have TCP/IP start the FTP Server. The FTP entry (e.g., FTPD) can include the PARMSTRING parameter to pass parameters to the FTP procedure when started. NOTE: Parameters passed on the PARMSTRING parameter override parameters specified in the FTP procedure. If an FTP entry is configured in the AUTOLOG statement block in the TCP/IP Profile configuration file, ensure the following items are in effect: -The ANONYMOUS keyword is not coded on the PARMSTRING parameter. -The ANONYMOUS=logonid combination is not coded on the PARMSTRING parameter. -The INACTIVE keyword is not coded on PARMSTRING parameter.

Fix: F-25642r868970_fix

Review the FTP daemon's started task JCL. Ensure that the ANONYMOUS and INACTIVE startup parameters are not specified and configuration file names are specified on the appropriate DD statements. The FTP daemon program can accept parameters in the JCL procedure that is used to start the daemon. The ANONYMOUS and ANONYMOUS= keywords are designed to allow anonymous FTP connections. The INACTIVE keyword is designed to set the timeout value for inactive connections. Control of these options is recommended through the configuration file statements rather than the startup parameters. The systems programmer responsible for supporting ICS will ensure that the startup parameters for the FTP daemon does not include the ANONYMOUS, ANONYMOUS=, or INACTIVE keywords. During initialization the FTP daemon searches multiple locations for the TCPIP.DATA and FTP.DATA files according to fixed sequences. In the daemon's started task JCL, Data Definition (DD) statements will be used to specify the locations of the files. The SYSTCPD DD statement identifies the TCPIP.DATA file and the SYSFTPD DD statement identifies the FTP.DATA file. The systems programmer responsible for supporting ICS will ensure that the FTP daemon's started task JCL specifies the SYSTCPD and SYSFTPD DD statements for configuration files.

b
IBM z/OS FTP.DATA configuration statements for the FTP server must specify the Standard Mandatory DoD Notice and Consent Banner statement.
AC-8 - Medium - CCI-001384 - V-223982 - SV-223982r877823_rule
RMF Control
AC-8
Severity
Medium
CCI
CCI-001384
Version
TSS0-FT-000100
Vuln IDs
  • V-223982
  • V-98671
Rule IDs
  • SV-223982r877823_rule
  • SV-107775
Display of a standardized and approved use notification before granting access to the publicly accessible operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist. The banner must be formatted in accordance with applicable DoD policy. Use the following verbiage for operating systems that can accommodate banners of 1300 characters: "You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details." Use the following verbiage for operating systems that have severe limitations on the number of characters that can be displayed in the banner: "I've read & consent to terms in IS user agreem't."
Checks: C-25655r516345_chk

Refer to the file specified on the SYSFTPD DD statement in the FTP started task JCL. If the BANNER statement is not coded or is commented out, this is a finding.

Fix: F-25643r516346_fix

Code the FTPD configuration file to include the BANNER statement that points to the Standard Mandatory DoD Notice and Consent Banner statement.

b
The IBM z/OS warning banner for the FTP server must be properly specified.
AC-8 - Medium - CCI-001384 - V-223983 - SV-223983r877824_rule
RMF Control
AC-8
Severity
Medium
CCI
CCI-001384
Version
TSS0-FT-000110
Vuln IDs
  • V-223983
  • V-98673
Rule IDs
  • SV-223983r877824_rule
  • SV-107777
Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist. The banner must be formatted in accordance with applicable DoD policy. Use the following verbiage for operating systems that can accommodate banners of 1300 characters: "You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details." Use the following verbiage for operating systems that have severe limitations on the number of characters that can be displayed in the banner: "I've read & consent to terms in IS user agreem't."
Checks: C-25656r516348_chk

Refer to the FTP.DATA file specified on the SYSFTPD DD statement in the FTP started task JCL. The SYSFTPD DD statement is optional. The search order for FTP.DATA is: /etc/ftp.data SYSFTPD DD statement jobname.FTP.DATA SYS1.TCPPARMS(FTPDATA) tcpip.FTP.DATA Examine the BANNER statement. If the BANNER statement in the FTP Data configuration file specifies an HFS file or data set that contains a logon banner, this is not a finding. The below banner is mandatory and deviations are not permitted except as authorized in writing by the DoD Chief Information Officer. The thrust of this new policy is to make it clear that there is no expectation of privacy when using DoD information systems and all use of DoD information systems is subject to searching, auditing, inspecting, seizing, and monitoring, even if some personal use of a system is permitted: STANDARD MANDATORY DOD NOTICE AND CONSENT BANNER You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details.

Fix: F-25644r516349_fix

Ensure the BANNER statement in the FTP Data configuration file specifies an HFS file or z/OS data set that contains a logon banner. The below banner is mandatory and deviations are not permitted except as authorized in writing by the DoD Chief Information Officer. The thrust of this new policy is to make it clear that there is no expectation of privacy when using DoD information systems and all use of DoD information systems is subject to searching, auditing, inspecting, seizing, and monitoring, even if some personal use of a system is permitted: STANDARD MANDATORY DOD NOTICE AND CONSENT BANNER You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG authorized purpose.

b
The IBM z/OS TFTP server program must be properly protected.
CM-7 - Medium - CCI-001764 - V-223984 - SV-223984r877825_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001764
Version
TSS0-FT-000120
Vuln IDs
  • V-223984
  • V-98675
Rule IDs
  • SV-223984r877825_rule
  • SV-107779
Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may provide a capability that runs counter to the mission or provides users with functionality that exceeds mission requirements. This includes functions and services installed at the operating system level. Some of the programs, installed by default, may be harmful or may not be necessary to support essential organizational operations (e.g., key missions, functions). Removal of executable programs is not always possible; therefore, establishing a method of preventing program execution is critical to maintaining a secure system baseline. Methods for complying with this requirement include restricting execution of programs in certain environments, while preventing execution in other environments; or limiting execution of certain program functionality based on organization-defined criteria (e.g., privileges, subnets, sandboxed environments, or roles).
Checks: C-25657r516351_chk

From the ISPF Command Shell enter: TSS WHOOWNS PROGRAM(*) If the Program resources TFTPD and EZATD are owned appropriately in the PROGRAM resource class, this is not a finding. Enter TSS WHOHAS(TFTPD) TSS WHOHAS(EZATD) If no access to the program resources TFTPD and EZATD is permitted, this is not a finding.

Fix: F-25645r516352_fix

Evaluate the impact of implementing the following change. Develop a plan of action and implement the change as required. Ensure that the EZATD program and its alias TFTPD are defined to CA-TSS and no access to the program resources TFTPD and EZATD is permitted. The following commands provide a sample of how to protect the TFTP server program by assigning ownership and no permissions: TSS ADD(ADMIN) PROGRAM(TFTPD,EZATD)

b
IBM z/OS JES2.** resource must be properly protected in the CA-TSS database.
AC-3 - Medium - CCI-000213 - V-223985 - SV-223985r877826_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000010
Vuln IDs
  • V-223985
  • V-98677
Rule IDs
  • SV-223985r877826_rule
  • SV-107781
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.
Checks: C-25658r516354_chk

From the ISPF Command Shell enter: WHOOWNS OPERCMDS(JES2) NOTE: JES2 is typically the name of the JES2 subsystem. Refer to the SUBSYS report and locate the entry with the description of PRIMARY JOB ENTRY SUBSYSTEM. The SUBSYSTEM NAME of this entry is the name of the JES2 subsystem. If the JES2. resource is not owned, or is owned inappropriately, in the OPERCMDS class, this is a finding.

Fix: F-25646r516355_fix

The JES2. resource must be owned in the OPERCMDS class. NOTE: JES2 is typically the name of the JES2 subsystem. Refer to the SUBSYS report and locate the entry with the description of PRIMARY JOB ENTRY SUBSYSTEM. The SUBSYSTEM NAME of this entry is the name of the JES2 subsystem. Extended MCS support allows the installation to control the use of JES2 system commands through the ACP. These commands are subject to various types of potential abuse. For this reason, it is necessary to place restrictions on the JES2 system commands that can be entered by particular operators. To control access to JES2 system commands, the following recommendations will be applied when implementing security: For Example: The following command may be used to establish default protection for JES2 system commands defined to the OPERCMDS resource class: TSS ADDTO(deptacid) OPERCMDS(JES2.)

b
IBM z/OS RJE workstations and NJE nodes must be controlled in accordance with STIG requirements.
AC-3 - Medium - CCI-000213 - V-223986 - SV-223986r877827_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000020
Vuln IDs
  • V-223986
  • V-98679
Rule IDs
  • SV-223986r877827_rule
  • SV-107783
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25659r516357_chk

Refer to SYS1.PARMLIB (JES2PARM) For each node entry If all JES2 defined NJE nodes and RJE workstations have a profile defined in the IBMFAC resource class, this is not a finding. Notes: Nodename is the NAME parameter value specified on the NODE statement. Review the JES2 parameters for NJE node definitions by searching for "NODE(" in the report. Workstation is RMTnnnn, where nnnn is the number on the RMT statement. Review the JES2 parameters for RJE workstation definitions by searching for "RMT(" in the report. NJE. and RJE. definitions will force logonid and password protection of all NJE and RJE connections respectively. This method is acceptable in lieu of using discrete profiles. If any JES2 defined NJE node or RJE workstation is not owned in the IBMFAC class, this is a finding.

Fix: F-25647r516358_fix

Ensure associated USERIDs exist for all RJE/NJE sources and review the authorizations for these remote facilities. Develop a plan of action and implement the changes as required by the OS/390 STIG.

b
IBM z/OS JES2 input sources must be controlled in accordance with the proper security requirements.
AC-3 - Medium - CCI-000213 - V-223987 - SV-223987r877828_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000030
Vuln IDs
  • V-223987
  • V-98681
Rule IDs
  • SV-223987r877828_rule
  • SV-107785
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.
Checks: C-25660r516360_chk

Refer the JES2PARM member of SYS1.PARMLIB Review the following resources in the JESINPUT resource class: NOTE: If any of the following are not defined within the JES2 parameters, the resource in the JESINPUT resource class does not have to be owned. INTRDR (internal reader for batch jobs) nodename (NJE node) OFFn.* (spool offload receiver) Rnnnn (RJE workstation) RDRnn (local card reader) STCINRDR (internal reader for started tasks) TSUINRDR (internal reader for TSO logons) Note 1: Nodename is the NAME parameter in the NODE statement. Review the NJE node definitions by searching for "NODE(" in the report. Note 2: OFFn, where n is the number of the offload receiver. Review the spool offload receiver definitions by searching for "OFF(" in the report. Note 3: Rnnnn, where nnnn is the number of the remote workstation. Review the RJE node definitions by searching for "RMT(" in the report. Note 4: RDRnn, where nn is the number of the reader. Review the reader definitions by searching for "RDR(" in the report. From the ISPF Command Shell enter: TSS WHOOWNS JESINPUT(*) If all of the resources above are owned by generic and/or fully qualified entries in the JESINPUT resource class, this is not a finding. If any of the above resources are not owned, or are owned inappropriately, in the JESINPUT resource class, this is a finding.

Fix: F-25648r516361_fix

Review the following resources in the JESINPUT resource class: INTRDR (internal reader for batch jobs) nodename (NJE node) OFFn.* (spool offload receiver) Rnnnn (RJE workstation) RDRnn (local card reader) STCINRDR (internal reader for started tasks) TSUINRDR (internal reader for TSO logons) Note: If any of the following are not defined within the JES2 parameters, the resource in the JESINPUT resource class does not have to be defined. Note 1: Nodename is the NAME parameter in the NODE statement. Review the JES2 parameters for NJE node definitions by searching for "NODE(" in the report. Note 2: OFFn, where n is the number of the offload receiver. Review the JES2 parameters for spool offload receiver definitions by searching for "OFF(" in the report. Note 3: Rnnnn, where nnnn is the number of the remote workstation. Review the JES2 parameters for RJE node definitions by searching for "RMT(" in the report. Note 4: RDRnn, where nn is the number of the reader. Review the JES2 parameters for reader definitions by searching for "RDR(" in the report. Ensure all of the defined resources above are owned by generic and/or fully qualified entries in the JESINPUT resource class. For Example: The following commands may be used to establish default protection for resources defined to the JESINPUT resource class: TSS ADDTO(deptacid) JESINPUT(OFFn.) Grant read access to authorized users for each of the resources defined to the JESINPUT resource class. The following is an example of granting operators with a profile ACID of jesopracid permission to restore jobs into any SPOOL off load processor after obtaining permission from the ISSO: TSS PERMIT(jesopracid) JESINPUT(OFF*.) ACCESS(READ) ACTION(AUDIT) The resource definition should be generic if all of the resources of the same type have identical access controls (e.g., if all off load receivers are equivalent).

b
IBM z/OS JES2 input sources must be properly controlled.
AC-3 - Medium - CCI-000213 - V-223988 - SV-223988r877829_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000040
Vuln IDs
  • V-223988
  • V-98683
Rule IDs
  • SV-223988r877829_rule
  • SV-107787
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.
Checks: C-25661r516363_chk

From the ISPF Command Shell enter: TSS WHOOWNS JESINPUT(*) For each resource owned If all of the TSS resources and/or generic equivalent identified above are defined with access restricted to the appropriate personnel, this is not a finding. If any of the TSS resources and/or generic equivalent identified above are not defined with access restricted to the appropriate personnel, this is a finding. From the ISPF Command Shell enter: TSS LIST RDT(*) If the JESINPT RESOURCE does not have DEFPROT as an attribute, this is a finding.

Fix: F-25649r516364_fix

Configure access authorization for resources defined to the JESINPUT resource class to be restricted to the appropriate personnel. Grant read access to authorized users for each of the following input sources: INTRDR nodename OFFn.* OFFn.JR OFFn.SR Rnnnn.RDm RDRnn STCINRDR TSUINRDR and/or TSOINRDR The resource definition will be generic if all of the resources of the same type have identical access controls (e.g., if all off load receivers are equivalent). The default access will be NONE except for sources that are permitted to submit jobs for all users. Those resources may be defined as either NONE or READ.

b
IBM z/OS JES2 output devices must be controlled in accordance with the proper security requirements.
AC-3 - Medium - CCI-000213 - V-223989 - SV-223989r877830_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000050
Vuln IDs
  • V-223989
  • V-98685
Rule IDs
  • SV-223989r877830_rule
  • SV-107789
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25662r516366_chk

Refer the JES2PARM member of SYS1.PARMLIB Review the WRITER resource in the JESINPUT resource class: NOTE: If the WRITER resource is not defined within the JES2 parameters, the resource in the JESINPUT resource class does not have to be owned. From the ISPF Command Shell enter: TSS WHOOWNS JESINPUT(WRITER) If the WRITER resource is owned by generic and/or fully qualified entries in the JESINPUT resource class, this is not a finding.

Fix: F-25650r516367_fix

Ensure the following items are in effect: -The JES2. resource is owned in the WRITER resource class. For Example: The following command may be used to establish default protection for resources defined to the WRITER resource class: TSS ADDTO(deptacid) WRITER(JES2.) -The ownership of all WRITER resources is appropriate. Grant read access to authorized users for each of the following WRITER resource class output destinations: JES2.LOCAL.devicename JES2.LOCAL.OFF*.JT JES2.LOCAL.OFF*.ST JES2.LOCAL.PRT* JES2.LOCAL.PUN* JES2.NJE.nodename JES2.RJE.devicename The following is an example of granting operators with a profile ACID of jesopracid permission to off load SYSOUT data sets into any SPOOL off load processor after obtaining permission from the ISSO: TSS PERMIT(jesopracid) WRITER(JES2.LOCAL.OFF*.ST) - ACCESS(READ) ACTION(AUDIT) The resource definition should be generic if all of the resources of the same type have identical access controls (e.g., if all off load transmitters are equivalent).

b
IBM z/OS JES2 output devices must be properly controlled for classified systems.
AC-3 - Medium - CCI-000213 - V-223990 - SV-223990r877831_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000060
Vuln IDs
  • V-223990
  • V-98687
Rule IDs
  • SV-223990r877831_rule
  • SV-107791
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25663r516369_chk

If the Classification of the system is unclassified, this is not applicable. From the ISPF Command Shell enter: TSS WHOHAS WRITER(JES2.) If the TSS WRITER resource or generic equivalent identified above is defined with access restricted to the appropriate personnel, this is not a finding. If the TSS WRITER resource or generic equivalent identified above is not defined with access restricted to the appropriate personnel, this is a finding. From the ISPF Command Shell enter: TSS LIST RDT(*) If the JESINPUT RESOURCE does not have DEFPROT as an attribute, this is a finding.

Fix: F-25651r868975_fix

Configure access authorization for resources defined to the WRITER resource class to be restricted to the operators and system programmers on a classified system only. Define resources in the ACP's respective WRITER class for each of the following output destinations: JES2.LOCAL.devicename JES2.LOCAL.OFFn.* JES2.LOCAL.OFFn.JT JES2.LOCAL.OFFn.ST JES2.LOCAL.PRTn JES2.LOCAL.PUNn JES2.NJE.nodename JES2.RJE.devicename The resource definition will be generic if all of the resources of the same type have identical access controls (e.g., if all off load transmitters are equivalent). If all users are permitted to route output to a specific destination, the resource controlling it may be defined with a default access of either NONE or READ. Otherwise it will be defined with a default access of NONE.

b
IBM z/OS JESSPOOL resources must be protected in accordance with security requirements.
AC-3 - Medium - CCI-000213 - V-223991 - SV-223991r877832_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000070
Vuln IDs
  • V-223991
  • V-98689
Rule IDs
  • SV-223991r877832_rule
  • SV-107793
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25664r516372_chk

Refer the JES2PARM member of SYS1.PARMLIB. Review the JESSPOOL resource in the JESINPUT resource class: NOTE: If the JESSPOOL resource is not defined within the JES2 parameters, the resource in the JESINPUT resource class does not have to be owned. From the ISPF Command Shell enter: TSS WHOOWNS JESINPUT(JESSPOOL) If the JESSPOOL resource is owned by generic and/or fully qualified entries in the JESINPUT resource class, this is not a finding.

Fix: F-25652r516373_fix

Review the JES2 parameters to determine the localnodeid by searching for OWNNODE in the NJEDEF statement, and then searching for NODE(nnnn) (where nnnn is the value specified by OWNNODE). The NAME parameter value specified on this NODE statement is the localnodeid. The following command may be used to establish default protection for resources defined to the JESSPOOL resource class: TSS ADDTO(deptacid) JESSPOOL(localnodeid.) Due to the protection established with the previous command, the following command should be issued to ensure users are able to access their own spool data: TSS PERMIT(ALL) JESSPOOL(localnodeid.%) ACCESS(ALL)

b
IBM z/OS JESNEWS resources must be protected in accordance with security requirements.
AC-3 - Medium - CCI-000213 - V-223992 - SV-223992r877833_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000080
Vuln IDs
  • V-223992
  • V-98691
Rule IDs
  • SV-223992r877833_rule
  • SV-107795
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25665r516375_chk

From the ISPF Command Shell enter: TSS WHOHAS OPERCMDS(JES2.) NOTE: JES2 is typically the name of the JES2 subsystem. Refer to the SUBSYS report and locate the entry with the description of PRIMARY JOB ENTRY SUBSYSTEM. The SUBSYSTEM NAME of this entry is the name of the JES2 subsystem. If access authorization to the JES2.UPDATE.JESNEWS resource in the OPERCMDS class restricts CONTROL access to the appropriate personnel (i.e., users responsible for maintaining the JES News data set) and all access is logged, this is not a finding.

Fix: F-25653r868977_fix

Configure access authorization to the JES2.UPDATE.JESNEWS resource in the OPERCMDS class to restrict CONTROL access to the appropriate personnel (i.e., users responsible for maintaining the JES News data set) and ensure all access is logged. NOTE: JES2 is typically the name of the JES2 subsystem. Refer to the SUBSYS report and locate the entry with the description of PRIMARY JOB ENTRY SUBSYSTEM. The SUBSYSTEM NAME of this entry is the name of the JES2 subsystem. For example: The following command example may be used to allow all valid TOP SECRET users read access to the JES News data set: TSS PERMIT(ALL) JESSPOOL(localnodeid.jesid.$JESNEWS.*.*.JESNEWS) - ACCESS(READ) The following is a sample command to allow production control personnel with a profile ACID of prodacid to update the JES News data set: TSS PERMIT(prodacid) OPERCMDS(JES2.UPDATE.JESNEWS) - ACCESS(CONTROL) ACTION(AUDIT)

b
IBM z/OS JESTRACE and/or SYSLOG resources must be protected in accordance with security requirements.
AC-3 - Medium - CCI-000213 - V-223993 - SV-223993r877834_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000090
Vuln IDs
  • V-223993
  • V-98693
Rule IDs
  • SV-223993r877834_rule
  • SV-107797
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25666r516378_chk

From the ISPF Command Shell enter: TSS WHOOWNS JESSPOOL(*) If JESSPOOL localnodeid resource is not defined, this is a finding. Enter TSS WHOHAS JESSPOOL(localnodeid.) Review the following resources defined to the JESSPOOL resource class: localnodeid.JES2.$TRCLOG.taskid.*.JESTRACE localnodeid.+MASTER+.SYSLOG.jobid.*.SYSLOG or localnodeid.+BYPASS+.SYSLOG.jobid.-.SYSLOG NOTE: These resource profiles may be more generic as long as they pertain directly to the JESTRACE and SYSLOG data sets. For example: localnodeid.JES2.*.*.*.JESTRACE localnodeid.+MASTER+.*.*.*.SYSLOG or localnodeid.+BYPASS+.*.*.*.SYSLOG NOTE: Review the JES2 parameters to determine the localnodeid by searching for OWNNODE in the NJEDEF statement, and then searching for NODE(nnnn) (where nnnn is the value specified by OWNNODE). The NAME parameter value specified on this NODE statement is the localnodeid. Another method is to issue the JES2 command $D NODE,NAME,OWNNODE=YES to obtain the NAME of the OWNNODE. If the access authorization for the resources mentioned above is restricted to the following, this is not a finding. -ACID(s) associated with external writer(s) can have complete access. NOTE: An external writer is an STC that removes data sets from the JES spool. In this case, it is responsible for archiving the JESTRACE and SYSLOG data sets. The STC default name is XWTR and the external writer program is called IASXWR00. -Systems personnel and security administrators responsible for diagnosing JES2 and z/OS problems can have complete access. -Application Development and Application Support personnel responsible for diagnosing application problems can have READ access to the SYSLOG resource.

Fix: F-25654r516379_fix

Configure the access authorization for resources defined to the JESTRACE and SYSLOG resources in the JESSPOOL resource class to be restricted to the appropriate personnel. Review the following resources defined to the JESSPOOL resource class: localnodeid.JES2.$TRCLOG.taskid.*.JESTRACE localnodeid.+MASTER+.SYSLOG.jobid.*.SYSLOG or localnodeid.+BYPASS+.SYSLOG.jobid.*.SYSLOG NOTE: These resource profiles may be more generic as long as they pertain directly to the JESTRACE and SYSLOG data sets. For example: localnodeid.JES2.$TRCLOG. localnodeid.+MASTER+.SYSLOG. or localnodeid.+BYPASS+.SYSLOG. NOTE: Review the JES2 parameters to determine the localnodeid by searching for OWNNODE in the NJEDEF statement, and then searching for NODE(nnnn) (where nnnn is the value specified by OWNNODE). The NAME parameter value specified on this NODE statement is the localnodeid. Another method is to issue the JES2 command $D NODE,NAME,OWNNODE=YES to obtain the NAME of the OWNNODE. Ensure that access authorization for the resources mentioned above is restricted to the following: -ACID(s) associated with external writer(s) can have complete access. NOTE: An external writer is a STC that removes data sets from the JES spool. In this case, it is responsible for archiving the JESTRACE and SYSLOG data sets. The STC default name is XWTR and the external writer program is called IASXWR00. -Systems personnel and security administrators responsible for diagnosing JES2 and z/OS problems can have complete access. -Application Development and Application Support personnel responsible for diagnosing application problems can have READ access to the SYSLOG resource. For Example: TSS ADD(dept-acid) JESSPOOL(localnodeid) TSS PERMIT(<syspsmpl>) JESSPOOL(localnodeid.JES2.$TRCLOG.) ACCESS(ALL) TSS PERMIT(<secasmpl>) JESSPOOL(localnodeid.JES2.$TRCLOG.) ACCESS(ALL) TSS PERMIT(<syspsmpl>) JESSPOOL(localnodeid.+MASTER+.SYSLOG.) ACCESS(ALL) TSS PERMIT(<secasmpl>) JESSPOOL(localnodeid.+MASTER+.SYSLOG.) ACCESS(ALL) TSS PERMIT(<appdsmpl>) JESSPOOL(localnodeid.+MASTER+.SYSLOG.) ACCESS(READ) TSS PERMIT(<appssmpl>) JESSPOOL(localnodeid.+MASTER+.SYSLOG.) ACCESS(READ) or TSS PERMIT(<syspsmpl>) JESSPOOL(localnodeid.+BYPASS+.SYSLOG.) ACCESS(ALL) TSS PERMIT(<secasmpl>) JESSPOOL(localnodeid.+BYPASS+.SYSLOG.) ACCESS(ALL) TSS PERMIT(<appdsmpl>) JESSPOOL(localnodeid.+BYPASS+.SYSLOG.) ACCESS(READ) TSS PERMIT(<appssmpl>) JESSPOOL(localnodeid.+BYPASS+.SYSLOG.) ACCESS(READ)

b
IBM z/OS JES2 spool resources must be controlled in accordance with security requirements.
AC-3 - Medium - CCI-000213 - V-223994 - SV-223994r877835_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000100
Vuln IDs
  • V-223994
  • V-98695
Rule IDs
  • SV-223994r877835_rule
  • SV-107799
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25667r516381_chk

From the ISPF Command Shell enter: TSS WHOHAS JESSPOOL(localnodeid.) If the following guidance is true, this is not a finding. Review the JESSPOOL report for resource permissions with the following naming convention. These permissions may be fully qualified, be specified as generic, or be specified with masking as indicated below: localnodeid.useracid.jobname.jobid.dsnumber.name localnodeid - The name of the node on which the SYSIN or SYSOUT data set currently resides. useracid - The user ACID associated with the job. This is the user ACID TSS uses for validation purposes when the job runs. jobname - The name that appears in the name field of the JOB statement. jobid - The job number JES2 assigned to the job. dsnumber - The unique data set number JES2 assigned to the spool data set. A D is the first character of this qualifier. name - The name of the data set specified in the DSN= parameter of the DD statement. If the JCL did not specify DSN= on the DD statement that creates the spool data set, JES2 uses a question mark (?). All users must have access to their own JESSPOOL resources. Permission can be granted by resource permission JESSPOOL(localnodeid.%.) ACCESS(ALL). This permission can be given to profiles, individual user, and/or the ALL record. Access to this resource does not require logging. Ensure the following items are in effect: The localnodeid. resource will be restricted to only system programmers, operators, and automated operations personnel, with access of ALL. All access will be logged. (localnodeid. resource includes all generic and/or masked permissions, example: localnodeid.**, localnodeid.*, etc.) The JESSPOOL localnodeid.userid.jobname.jobid.dsnumber.name, whether generic and/or masked, can be made available to users, when approved by the ISSO. Access will be identified at the minimum access for the user to accomplish the users function. All access will be logged. An example is team members within a team, providing the capability to view, help, and/or debug other team member jobs/processes. CSSMTP will be restricted to localnodeid.userid.jobname.jobid.dsnumber.name, whether generic and/or masked when approved by the ISSO. All access will be logged. Spooling products users (CA-SPOOL, CA View, etc.) will be restricted to localnodeid.userid.jobname.jobid.dsnumber.name, whether generic and/or masked when approved by the ISSO. Logging of access is not required.

Fix: F-25655r868979_fix

Configure the following items to be in effect for JESSPOOL resources. The JESSPOOL may have more restrictive security at the direction of the ISSO. The JESSPOOL resources may be fully qualified, be specified as generic, or be specified with masking as indicated below: localnodeid.userid.jobname.jobid.dsnumber.name localnodeid - The name of the node on which the SYSIN or SYSOUT data set currently resides. userid - The userid associated with the job. This is the userid used for validation purposes when the job runs. jobname - The name that appears in the name field of the JOB statement. jobid - The job number JES2 assigned to the job. dsnumber - The unique data set number JES2 assigned to the spool data set. A D is the first character of this qualifier. name - The name of the data set specified in the DSN= parameter of the DD statement. If the JCL did not specify DSN= on the DD statement that creates the spool data set, JES2 uses a question mark (?). All users must have access to their own JESSPOOL resources. Permission can be granted by resource permission JESSPOOL(localnodeid.%.) ACCESS(ALL). This permission can be given to profiles, individual user, and/or the ALL record. Access to this resource does not require logging. Example: TSS ADDTO(deptacid) JESSPOOL(localnode.) TSS PERMIT(ALL) JESSPOOL(localnode.%.) ACCESS(ALL) The localnodeid. resource will be restricted to only system programmers, operators, and automated operations personnel, with access of ALL. All access will be logged. (localnodeid. resource includes all generic and/or masked permissions, example: localnodeid.**, localnodeid.*, etc.) Example: TSS PERMIT(syspsmpl) JESSPOOL(localnodeid.) ACCESS(ALL) ACTION(AUDIT) The JESSPOOL localnodeid.userid.jobname.jobid.dsnumber.name, whether generic and/or masked, can be made available to users, when approved by the ISSO. Access will be identified at the minimum access for the user to accomplish the users function. All access will be logged. An example is team members within a team, providing the capability to view, help, and/or debug other team member jobs/processes. If frequent situations occur where users working on a common project require selective access to each other's jobs, then the installation may delegate to the individual users the authority to grant access, but only with the approval of the ISSO. Example: TSS PERMIT(Project1-profile) JESSPOOL(localnodeid.UMO) ACCESS(ALL) If IBM's SDSF product is installed on the system, resources defined to the JESSPOOL resource class control functions related to jobs, output groups, and SYSIN/SYSOUT data sets on various SDSF panels. CSSMTP will not be granted to the JESSPOOL resource of the high level "node." or "localnodeid.". CSSMTP can have access to the specific approved JESSPOOL resources, minimally qualified to the "node.userid." and all access will be logged. This will ensure system records who (userid) sent traffic to CSSMTP, when and what job/process. Spooling products users (CA-SPOOL, CA View, etc.) will be restricted to localnodeid.userid.jobname.jobid.dsnumber.name, whether generic and/or masked when approved by the ISSO. Logging of access is not required. The ISSO will review JESSPOOL resource rules. If a rule has been determined not to have been used within the last two years, the rule will be removed.

b
IBM z/OS JES2 system commands must be protected in accordance with security requirements.
AC-3 - Medium - CCI-000213 - V-223995 - SV-223995r877836_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000110
Vuln IDs
  • V-223995
  • V-98697
Rule IDs
  • SV-223995r877836_rule
  • SV-107801
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25668r516384_chk

From the ISPF Command Shell enter: TSS WHOHAS OPERCMDS(JES2.) If the JES2.** resource is defined to the OPERCMDS class with an access of NONE and all access is logged, this is not a finding. If access to JES2 system commands defined in the IBM z/OS JES2 commands is restricted to the appropriate personnel (e.g., operations staff, systems programming personnel, general users), this is not a finding. NOTE: Use the GROUP category specified in the table referenced above as a guideline to determine appropriate personnel access to system commands.

Fix: F-25656r516385_fix

Extended MCS support allows the installation to control the use of JES2 system commands through the ESM. These commands are subject to various types of potential abuse. For this reason, it is necessary to place restrictions on the JES2 system commands that can be entered by particular operators. Some commands are particularly dangerous and should only be used when less drastic options have been exhausted. Misuse of these commands can create a situation in which the only recovery is an IPL. To control access to JES2 system commands, apply the following: implementing security: Define the JES2.** resource in the OPERCMDS class with an access of NONE and all access is logged. Define the JES2 system commands as specified in the IBM z/OS JES2 Commands to be restricted to the appropriate personnel (e.g., operations staff, systems programming personnel, general users), as determined in the documented site Security Plan. Define the JES2 system commands with proper logging as determined in the documented site Security Plan. Note: Display commands and others as deemed by the site IAW site security plan may be allowed for all users with no logging. Build a command file based on the referenced JES2 Command Table. A sample of the commands in the command file is provided here: RDEF OPERCMDS JES2.** UACC(NONE) OWNER(ADMIN) AUDIT(ALL(READ)) DATA('REQUIRED BY SRR PDI ZJES0052') RDEF OPERCMDS JES2.<command>.** UACC(NONE) OWNER(ADMIN) AUDIT(ALL(READ)) DATA('REQUIRED BY SRR PDI ZJES0052') PE JES2.<command>.** CL(OPERCMDS) ID(<syspsmpl>) ACC(U) SETR RACL(OPERCMDS) REF

b
IBM z/OS Surrogate users must be controlled in accordance with proper security requirements.
AC-3 - Medium - CCI-000213 - V-223996 - SV-223996r877837_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-JS-000120
Vuln IDs
  • V-223996
  • V-98699
Rule IDs
  • SV-223996r877837_rule
  • SV-107803
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000326-GPOS-00126
Checks: C-25669r516387_chk

From the ISPF Command Shell enter: TSS LIST(ACIDS) DATA(XA) If no XA ACID entries exist in the above reports, this is not applicable. For each ACID identified in the XA ACID entries, if the following items are true regarding ACID permissions, this is not a finding. -ACID permission (XA ACID) is logged (ACTION = AUDIT), only for Privileged USERIDS (MASTER, SCA, DCA, VCA, ZCA) if they are XAUTH; at the discretion of the ISSM/ISSO scheduling tasks may be exempted from logging. -Access authorization is restricted to scheduling tools, started tasks or other system applications required for running production jobs. -Other users may have minimal access required for running production jobs with documentation properly approved and filed with the site security official (ISSM or equivalent).

Fix: F-25657r516388_fix

For each ACID identified in the XA ACID entries, ensure the following items are in effect regarding ACID permissions: -ACID permission (XA ACID) is logged (ACTION = AUDIT), at the discretion of the ISSM/ISSO scheduling tasks may be exempted from logging. -ACID permission (XA ACID) is logged (ACTION = AUDIT), for Privileged users (MSCA, SCA, DCA, VCA, ZCA). -Access authorization is restricted to scheduling tools, started tasks, or other system applications required for running production jobs. Other users may have minimal access required for running production jobs with documentation properly approved and filed with the site security official (ISSM or equivalent). Consider the following recommendations when implementing security for Cross-Authorized ACIDs: Keep ACID cross authorization of ACIDs outside of those granted to the scheduling software to a minimum number of individuals. The simplest configuration is to have no ACID Cross Authorization except for the appropriate Scheduling task/software for production scheduling purposes as documented. Temporary Cross Authorization of the production batch ACID to the scheduling tasks may be allowed for a period for testing by the appropriate specific production Support Team members. Authorization, eligibility, and test period is determined by site policy. Access authorization is restricted to the minimum number of personnel required for running production jobs. However, ACID Cross Authorization usage must not become the default for all jobs submitted by individual userids (i.e., system programmer will use their assigned individual userids for software installation, duties, whereas a Cross-Authorized ACID would normally be utilized for scheduled batch production only and as such must normally be limited to the scheduling task such as CONTROLM) and not granted as a normal daily basis to individual users. Grant access to the user ACID for each cross-authorized ACID required: For Example: TSS PERMIT(ACID) ACID(Cross-Authorized ACID) ACTION(AUDIT) For production ACIDs being used by CONTROLM: TSS PER(CONTROLM)ACID(production user ACID)

b
Duplicated IBM z/OS sensitive utilities and/or programs must not exist in APF libraries.
CM-7 - Medium - CCI-000381 - V-223997 - SV-223997r877838_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
TSS0-OS-000010
Vuln IDs
  • V-223997
  • V-98701
Rule IDs
  • SV-223997r877838_rule
  • SV-107805
Removal of unneeded or non-secure functions, ports, protocols, and services mitigate the risk of unauthorized connection of devices, unauthorized transfer of information, or other exploitation of these resources.
Checks: C-25670r516390_chk

From an ISPF Command line enter: TSO ISRDDN APF An APF List results. On the Command line enter: DUPlicates (Make sure there is appropriate access. If there is not, you may receive insufficient access errors.) If any of the list of Sensitive Utilities exist in the duplicate APF modules returned, this is a finding. The following list contains Sensitive Utilities that will be checked. AHLGTF AMASPZAP AMAZAP AMDIOCP AMZIOCP BLSROPTR CSQJU003 CSQJU004 CSQUCVX CSQUTIL CSQ1LOGP DEBE DITTO FDRZAPOP GIMSMP HHLGTF ICKDSF ICPIOCP IDCSC01 IEHINITT IFASMFDP IGWSPZAP IHLGTF IMASPZAP IND$FILE IOPIOCP IXPIOCP IYPIOCP IZPIOCP WHOIS L052INIT TMSCOPY TMSFORMT TMSLBLPR TMSMULV TMSREMOV TMSTPNIT TMSUDSNB

Fix: F-25658r516391_fix

Review and ensure that duplicate sensitive utility(ies) and/or program(s) do not exist in APF-authorized libraries. Identify all versions of the sensitive utilities contained in APF-authorized libraries listed in the above check. In cases where duplicates exist, ensure no exposure has been created and written justification has been filed with the ISSO. Comparisons among all the APF libraries will be done to ensure that an exposure is not created by the existence of identically named modules. Address any sensitive utility concerns so that the function can be restricted as required.

b
IBM z/OS required SMF data record types must be collected.
AC-2 - Medium - CCI-000018 - V-223998 - SV-223998r877839_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-000018
Version
TSS0-OS-000020
Vuln IDs
  • V-223998
  • V-98703
Rule IDs
  • SV-223998r877839_rule
  • SV-107807
Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an account. Auditing account creation actions provides logging that can be used for forensic purposes. To address access requirements, many operating systems may be integrated with enterprise level authentication/access/auditing mechanisms that meet or exceed access control policy requirements. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000037-GPOS-00015, SRG-OS-000038-GPOS-00016, SRG-OS-000039-GPOS-00017, SRG-OS-000040-GPOS-00018, SRG-OS-000041-GPOS-00019, SRG-OS-000042-GPOS-00021, SRG-OS-000064-GPOS-00033, SRG-OS-000458-GPOS-00203, SRG-OS-000461-GPOS-00205, SRG-OS-000462-GPOS-00206, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209, SRG-OS-000466-GPOS-00210, SRG-OS-000467-GPOS-00211, SRG-OS-000468-GPOS-00212, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000472-GPOS-00217, SRG-OS-000473-GPOS-00218, SRG-OS-000474-GPOS-00219, SRG-OS-000475-GPOS-00220, SRG-OS-000476-GPOS-00221, SRG-OS-000477-GPOS-00222, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000255-GPOS-00096, SRG-OS-000365-GPOS-00152, SRG-OS-000348-GPOS-00136, SRG-OS-000303-GPOS-00120, SRG-OS-000327-GPOS-00127, SRG-OS-000392-GPOS-00172
Checks: C-25671r868981_chk

Refer to IEASYS00 member in SYS1.PARMLIB Concatenation. Determine proper SMFPRMxx member. If all of the required SMF record types identified below are collected, this is not a finding. IBM SMF Records to be collected at a minimum: 0 (00) - IPL 6 (06) - External Writer/ JES Output Writer/ Print Services Facility (PSF) 7 (07) - [SMF] Data Lost 14 (0E) - INPUT or RDBACK Data Set Activity 15 (0F) - OUTPUT, UPDAT, INOUT, or OUTIN Data Set Activity 17 (11) - Scratch Data Set Status 18 (12) - Rename Non-VSAM Data Set Status 24 (18) - JES2 Spool Offload 25 (19) - JES3 Device Allocation 26 (1A) - JES Job Purge 30 (1E) - Common Address Space Work 32 (20) - TSO/E User Work Accounting 41 (29) - DIV Objects and VLF Statistics 42 (2A) - DFSMS statistics and configuration 43 (2B) - JES Start 45 (2D) - JES Withdrawal/Stop 47 (2F) - JES SIGNON/Start Line (BSC)/LOGON 48 (30) - JES SIGNOFF/Stop Line (BSC)/LOGOFF 49 (31) - JES Integrity 52 (34) - JES2 LOGON/Start Line (SNA) 53 (35) - JES2 LOGOFF/Stop Line (SNA) 54 (36) - JES2 Integrity (SNA) 55 (37) - JES2 Network SIGNON 56 (38) - JES2 Network Integrity 57 (39) - JES2 Network SYSOUT Transmission 58 (3A) - JES2 Network SIGNOFF 60 (3C) - VSAM Volume Data Set Updated 61 (3D) - Integrated Catalog Facility Define Activity 62 (3E) - VSAM Component or Cluster Opened 64 (40) - VSAM Component or Cluster Status 65 (41) - Integrated Catalog Facility Delete Activity 66 (42) - Integrated Catalog Facility Alter Activity 80 (50) - RACF/TOP SECRET Processing 81 (51) - RACF Initialization 82 (52) - ICSF Statistics 83 (53) - RACF Audit Record For Data Sets 90 (5A) - System Status 92 (5C) except subtypes 10, 11 - OpenMVS File System Activity 102 (66) - DATABASE 2 Performance 103 (67) - IBM HTTP Server 110 (6E) - CICS/ESA Statistics 118 (76) - TCP/IP Statistics 119 (77) - TCP/IP Statistics 199 (C7) - TSOMON 230 (E6) - ACF2 or as specified in ACFFDR (vendor-supplied default is 230) 231 (E7) - TSS logs security events under this record type

Fix: F-25659r868982_fix

Ensure that SMF recording options are consistent with those outlined below. IBM SMF Records to be collected at a minimum: 0 (00) - IPL 6 (06) - External Writer/ JES Output Writer/ Print Services Facility (PSF) 7 (07) - [SMF] Data Lost 14 (0E) - INPUT or RDBACK Data Set Activity 15 (0F) - OUTPUT, UPDAT, INOUT, or OUTIN Data Set Activity 17 (11) - Scratch Data Set Status 18 (12) - Rename Non-VSAM Data Set Status 24 (18) - JES2 Spool Offload 25 (19) - JES3 Device Allocation 26 (1A) - JES Job Purge 30 (1E) - Common Address Space Work 32 (20) - TSO/E User Work Accounting 41 (29) - DIV Objects and VLF Statistics 42 (2A) - DFSMS statistics and configuration 43 (2B) - JES Start 45 (2D) - JES Withdrawal/Stop 47 (2F) - JES SIGNON/Start Line (BSC)/LOGON 48 (30) - JES SIGNOFF/Stop Line (BSC)/LOGOFF 49 (31) - JES Integrity 52 (34) - JES2 LOGON/Start Line (SNA) 53 (35) - JES2 LOGOFF/Stop Line (SNA) 54 (36) - JES2 Integrity (SNA) 55 (37) - JES2 Network SIGNON 56 (38) - JES2 Network Integrity 57 (39) - JES2 Network SYSOUT Transmission 58 (3A) - JES2 Network SIGNOFF 60 (3C) - VSAM Volume Data Set Updated 61 (3D) - Integrated Catalog Facility Define Activity 62 (3E) - VSAM Component or Cluster Opened 64 (40) - VSAM Component or Cluster Status 65 (41) - Integrated Catalog Facility Delete Activity 66 (42) - Integrated Catalog Facility Alter Activity 80 (50) - RACF/TOP SECRET Processing 81 (51) - RACF Initialization 82 (52) - ICSF Statistics 83 (53) - RACF Audit Record For Data Sets 90 (5A) - System Status 92 (5C) except subtypes 10, 11 - OpenMVS File System Activity 102 (66) - DATABASE 2 Performance 103 (67) - IBM HTTP Server 110 (6E) - CICS/ESA Statistics 118 (76) - TCP/IP Statistics 119 (77) - TCP/IP Statistics 199 (C7) - TSOMON 230 (E6) - ACF2 or as specified in ACFFDR (vendor-supplied default is 230) 231 (E7) - TSS logs security events under this record type

b
IBM z/OS Session manager must properly configure wait time limits.
AC-11 - Medium - CCI-000057 - V-223999 - SV-223999r877840_rule
RMF Control
AC-11
Severity
Medium
CCI
CCI-000057
Version
TSS0-OS-000030
Vuln IDs
  • V-223999
  • V-98705
Rule IDs
  • SV-223999r877840_rule
  • SV-107809
A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock. The session lock is implemented at the point where session activity can be determined and/or controlled.
Checks: C-25672r516396_chk

If the session manager in use initiates a session lock after a 15-minute period of inactivity for all connection types, this is not a finding.

Fix: F-25660r516397_fix

Configure the session manager in use to initiate a session lock after a 15-minute period of inactivity for all connection types.

b
The IBM z/OS BPX.SMF resource must be properly configured.
AC-17 - Medium - CCI-000067 - V-224000 - SV-224000r877841_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-000067
Version
TSS0-OS-000040
Vuln IDs
  • V-224000
  • V-98707
Rule IDs
  • SV-224000r877841_rule
  • SV-107811
Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) communicating through an external, non organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Automated monitoring of remote access sessions allows organizations to detect cyberattacks and also ensure ongoing compliance with remote access policies by auditing connection activities of remote access capabilities, such as Remote Desktop Protocol (RDP), on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets).
Checks: C-25673r868984_chk

Review the FACILITY resource class for BPX.SMF. If the RACF rules are as follows, this is not a finding. BPX.SMF.119.94 - READ allowed for users running the ssh, sftp, or scp client commands. BPX.SMF.119.96 - READ allowed for users running the scp or sftp-server server commands. BPX.SMF.119.97 - READ allowed for users running the scp or sftp client commands. The following profile grants the permitted users the authority to write or test for any SMF record being recorded. Access should be permitted as follows: BPX.SMF - READ access only when documented and justified in Site Security Plan. Documentation should include a reason why a more specific profile is not acceptable.

Fix: F-25661r868985_fix

Configure Facility resource class for BPX.SMF as follows: BPX.SMF.119.94 - READ allowed for users running the ssh, sftp, or scp client commands. BPX.SMF.119.96 - READ allowed for users running the scp or sftp-server server commands. BPX.SMF.119.97 - READ allowed for users running the scp or sftp client commands. The following profile grants the permitted users the authority to write or test for any SMF record being recorded. Access should be permitted as follows: BPX.SMF - READ access only when documented and justified in Site Security Plan. Documentation should include a reason why a more specific profile is not acceptable.

b
IBM z/OS must specify SMF data options to ensure appropriate activation.
AU-3 - Medium - CCI-000131 - V-224001 - SV-224001r877842_rule
RMF Control
AU-3
Severity
Medium
CCI
CCI-000131
Version
TSS0-OS-000050
Vuln IDs
  • V-224001
  • V-98709
Rule IDs
  • SV-224001r877842_rule
  • SV-107813
Without establishing when events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment and provide forensic analysis, it is essential for security personnel to know when events occurred (date and time). Associating event types with detected events in the operating system audit logs provides a means of investigating an attack; recognizing resource utilization or capacity thresholds; or identifying an improperly configured operating system. Satisfies: SRG-OS-000038-GPOS-00016, SRG-OS-000039-GPOS-00017, SRG-OS-000040-GPOS-00018, SRG-OS-000041-GPOS-00019, SRG-OS-000042-GPOS-00021, SRG-OS-000254-GPOS-00095, SRG-OS-000269-GPOS-00103, SRG-OS-000368-GPOS-00154
Checks: C-25674r516402_chk

Refer to IEASYS00 member in SYS1.PARMLIB Concatenation. Determine proper SMFPRMxx member. SUBSYS(STC,EXITS(IEFU29,IEFU83,IEFU84,IEFUJP,IEFUSO), INTERVAL(SMF,SYNC),NODETAIL) If the SMF collection options are specified as stated below with exception of those specified in the above NOTEs, this is not a finding. The settings for several parameters are critical to the collection process: ACTIVE Activates the collection of SMF data. MAXDORM(0500) Specifies the amount of real time that SMF allows data to remain in an SMF buffer before it is written to a recording data set. Value is site defined. SID Specifies the system ID to be recorded in all SMF records. SYS(DETAIL) Controls the level of detail recorded. SYS(INTERVAL) Ensures the periodic recording of data for long running jobs. SYS Specifies the types and sub types of SMF records that are to be collected. SYS(TYPE) indicates that the supplied list is inclusive (i.e., specifies the record types to be collected). Record types not listed are not collected. SYS(NOTYPE) indicates that the supplied list is exclusive (i.e., specifies those record types not to be collected). Record types listed are not collected. The site may use either form of this parameter to specify SMF record type collection. However, at a minimum, all record types are listed.

Fix: F-25662r516403_fix

Ensure that collection options for SMF Data are consistent with options specified below. Review all SMF recording specifications found in SMFPRMxx members. Ensure that SMF recording options used are consistent with those outlined below. The settings for several parameters are critical to the collection process: ACTIVE Activates the collection of SMF data. MAXDORM(mmss) Specifies the amount of real time that SMF allows data to remain in an SMF buffer before it is written to a recording data set. Use the MAXDORM parameter to minimize the amount of data lost because of system failure. This value is site determined and should be carefully configured. SID Specifies the system ID to be recorded in all SMF records. SYS(DETAIL) Controls the level of detail recorded. SYS(INTERVAL) Ensures the periodic recording of data for long running jobs. SYS Specifies the types and sub types of SMF records that are to be collected. SYS(TYPE) indicates that the supplied list is inclusive (i.e., specifies the record types to be collected). Record types not listed are not collected. SYS(NOTYPE) indicates that the supplied list is exclusive (i.e., specifies those record types not to be collected). Record types not listed are not collected. The site may use either form of this parameter to specify SMF record type collection. However, at a minimum all record types are listed.

b
IBM z/OS BUFUSEWARN in the SMFPRMxx must be properly set.
AU-5 - Medium - CCI-000139 - V-224002 - SV-224002r877843_rule
RMF Control
AU-5
Severity
Medium
CCI
CCI-000139
Version
TSS0-OS-000060
Vuln IDs
  • V-224002
  • V-98711
Rule IDs
  • SV-224002r877843_rule
  • SV-107815
It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an impending failure of the audit capability, and system operation may be adversely affected. Audit processing failures include software/hardware errors, failures in the audit capturing mechanisms, and audit storage capacity being reached or exceeded. This requirement applies to each audit data storage repository (i.e., distinct information system component where audit records are stored), the centralized audit storage capacity of organizations (i.e., all audit data storage repositories combined), or both.
Checks: C-25675r516405_chk

Refer to IEASYS00 member in SYS1.PARMLIB Concatenation. Determine proper SMFPRMxx member in SYS1.PARMLIB. If BUFUSEWARN is set for "75" (75%) or less, this is not a finding.

Fix: F-25663r516406_fix

Configure the BUFUSEWARN statement in SMFPRMxx to "75" (75%) or less.

b
IBM z/OS PASSWORD data set and OS passwords must not be used.
CM-6 - Medium - CCI-000366 - V-224003 - SV-224003r877844_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-OS-000070
Vuln IDs
  • V-224003
  • V-98713
Rule IDs
  • SV-224003r877844_rule
  • SV-107817
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25676r516408_chk

Ask the system administrator to determine if the system PASSWORD data set and OS passwords are being used. If, based on the information provided, it can be determined that the system PASSWORD data set and OS passwords are not used, this is not a finding. If it is evident that OS passwords are utilized, this is a finding.

Fix: F-25664r516409_fix

System programmers will ensure that the old OS Password Protection is not used and any data protected by the old OS Password technology is removed and protection is replaced by the ACP. Review the contents of the PASSWORD data set. Ensure that any protections it provides are provided by the ACP and delete the PASSWORD data set. Access to data sets on z/OS systems can be protected using the OS password capability of MVS. This capability has been available in MVS for many years, and its use is commonly found in data centers. Since the advent of ACPs, the use of OS passwords for file protection has diminished, and is commonly considered archaic and of little use. The use of z/OS passwords is not supported by all the ACPs.

b
The CA-TSS database must be on a separate physical volume from its backup and recovery data sets.
CM-6 - Medium - CCI-000366 - V-224004 - SV-224004r877845_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-OS-000080
Vuln IDs
  • V-224004
  • V-98715
Rule IDs
  • SV-224004r877845_rule
  • SV-107819
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25677r516411_chk

Refer to the System proclibs for the TSS STC. If the Security database is located on the same volume as either the backup, Alternate or Recovery file, this is a finding.

Fix: F-25665r516412_fix

Configure the placement of ESM files are on a separate volume from its backup and recovery data sets to provide backup and recovery in the event of physical damage to a volume. Identify the ESM database(s), backup database(s), and recovery data set(s). Develop a plan to keep these data sets on different physical volumes. Implement the movement of these critical ESM files. File location is an often overlooked factor in system integrity. It is important to ensure that the effects of hardware failures on system integrity and availability are minimized. Avoid collocation of files such as primary and alternate databases. For example, the loss of the physical volume containing the ESM database should not also cause the loss of the ESM backup database as a result of their collocation. Files that will be segregated from each other on separate physical volumes include, but are not limited to, the ESM database and its alternate or backup file.

b
The CA-TSS database must be backed up on a scheduled basis.
CM-6 - Medium - CCI-000366 - V-224005 - SV-224005r877846_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-OS-000090
Vuln IDs
  • V-224005
  • V-98717
Rule IDs
  • SV-224005r877846_rule
  • SV-107821
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25678r516414_chk

Refer to the TSS Proclib PARMFILE DD to determine the PARM member. If the BACKUP is missing or coded with blank or OFF this is a finding. Note: If the security data base is shared only one of the systems is required to configure the BACKUP option in the PARMFILE. Determine that the option is properly coded on one of the systems that share the security database. From the ISPF Command Shell enter: TSS MODIFY(Status) If the backup parameter is active with a valid time this is not a finding.

Fix: F-25666r516415_fix

Configure the TSS PARMLIB BACKUP parameter to include BACKUP statement with a valid time. Additionally, configure the BACKUP parameter in the TSS Parmfile to include BACKUP statement with a valid time for nightly backups.

b
The IBM z/OS Policy Agent must be configured to deny-all, allow-by-exception firewall policy for allowing connections to other systems.
CM-6 - Medium - CCI-000366 - V-224006 - SV-224006r877847_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-OS-000100
Vuln IDs
  • V-224006
  • V-98719
Rule IDs
  • SV-224006r877847_rule
  • SV-107823
Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
Checks: C-25679r516417_chk

Examine the policy agent policy statements. If it can be determined that the policy agent employs a deny-all, allow-by exception firewall policy for allowing connections to other systems this is not a finding.

Fix: F-25667r516418_fix

Develop a policy application and policy agent to employ a deny-all, allow-by-exception firewall policy for allowing connections to other systems.

b
IBM z/OS must not have Inaccessible APF libraries defined.
CM-7 - Medium - CCI-000381 - V-224007 - SV-224007r877848_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
TSS0-OS-000110
Vuln IDs
  • V-224007
  • V-98723
Rule IDs
  • SV-224007r877848_rule
  • SV-107827
It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions). Examples of non-essential capabilities include, but are not limited to, games, software packages, tools, and demonstration software, not related to requirements or providing a wide array of functionality not required for every mission, but which cannot be disabled.
Checks: C-25680r516420_chk

Refer to IEASYS00 member in SYS1.PARMLIB Concatenation. Determine proper APF and/or PROG member. Examine each entry and verify that it exists on the specified volume. If inaccessible APF libraries exist, this is a finding. ISRDDN APF

Fix: F-25668r516421_fix

Review the entire list of APF authorized libraries and remove those that are no longer valid designations.

b
IBM z/OS inapplicable PPT entries must be invalidated.
CM-7 - Medium - CCI-000381 - V-224008 - SV-224008r877849_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
TSS0-OS-000120
Vuln IDs
  • V-224008
  • V-98725
Rule IDs
  • SV-224008r877849_rule
  • SV-107829
It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions). Examples of non-essential capabilities include, but are not limited to, games, software packages, tools, and demonstration software, not related to requirements or providing a wide array of functionality not required for every mission, but which cannot be disabled.
Checks: C-25681r868987_chk

Review program entries in the IBM Program Properties Table (PPT). You may use a third-party product to examine these entries; however, to determine program entries, issue the following command from an ISPF command line: TSO ISRDDN LOAD IEFSDPPT Press Enter. Interpret the display as follows: Examine contents at offset 8 Hex 'x2' - Bypass Password Protection Hex 'x3' - Bypass Password Protection Hex 'x4' - No data set Integrity Hex 'x5' - No data set Integrity Hex 'x6' - Both Hex 'x7' - Both Determine Privilege Key at offset 9. A value of hex '70' or less indicates an elevated privilege. For each module identified in the "eyecatcher" that has BYPASS Password Protection, No data set Integrity, an elevated Privilege Key, or any combination thereof, determine if there is a valid loaded module. Again, you may use a third-party product; otherwise, execute the following steps: From an ISPF command line TSO ISRDDN LOAD &lt;privileged module&gt; Press Enter. If the return message is "Load Failed", make sure there is an entry in PARMLIB member SCHEDxx that revokes the excessive privilege. If this is not true, this is a finding.

Fix: F-25669r868988_fix

Review the PPT and define all entries associated with nonexistent or inapplicable modules as invalidated. Nullify the invalid IEFSDPPT entry by ensuring that there is a corresponding SCHED entry, which confers no special attributes. Use the following recommendations and techniques to provide protection for the PPT: Review the IEFSDPPT module and all programs that IBM has, by default, placed in the PPT to validate their applicability to the execution system. Refer to the IBM z/OS MVS Initialization and Tuning Reference documentation for the version and release of z/OS installed at the individual site for the actual contents of the default IEFSDPPT. Modules for products not in use on the system will have their special privileges explicitly revoked. Do this by placing a PPT entry for each module in the SYS1.PARMLIB(SCHEDxx) member, specifying no special privileges. The PPT entry for each overridden program will be in the following format, accepting the default (unprivileged) values for the sub parameters: PPT PGMNAME(<program name>) Assemble documentation regarding these PPT entries, and the ISSO will keep it on file. Include the following in the documentation: -The product and release for which the PPT entry was made -The last date this entry was reviewed to authenticate status -The reason the module's privileges are being revoked

b
IBM z/OS LNKAUTH=APFTAB must be specified in the IEASYSxx member(s) in the currently active parmlib data set(s).
CM-7 - Medium - CCI-000381 - V-224009 - SV-224009r877850_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
TSS0-OS-000130
Vuln IDs
  • V-224009
  • V-98727
Rule IDs
  • SV-224009r877850_rule
  • SV-107831
It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions). Examples of non-essential capabilities include, but are not limited to, games, software packages, tools, and demonstration software, not related to requirements or providing a wide array of functionality not required for every mission, but which cannot be disabled.
Checks: C-25682r516426_chk

Refer to IEASYS00 member in SYS1.PARMLIB Concatenation. If "LNKAUTH=APFTAB" is not specified, this is a finding.

Fix: F-25670r516427_fix

Configure LNKAUTH=APFTAB in the IEASYS00 member of PARMLIB.

b
IBM z/OS sensitive and critical system data sets must not exist on shared DASD.
SC-4 - Medium - CCI-001090 - V-224010 - SV-224010r877851_rule
RMF Control
SC-4
Severity
Medium
CCI
CCI-001090
Version
TSS0-OS-000140
Vuln IDs
  • V-224010
  • V-98729
Rule IDs
  • SV-224010r877851_rule
  • SV-107833
Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from being available to any current users/roles (or current processes) that obtain access to shared system resources (e.g., registers, main memory, hard disks) after those resources have been released back to information systems. The control of information in shared resources is also commonly referred to as object reuse and residual information protection. This requirement generally applies to the design of an information technology product, but it can also apply to the configuration of particular information system components that are, or use, such products. This can be verified by acceptance/validation processes in DoD or other government agencies. There may be shared resources with configurable protections (e.g., files in storage) that may be assessed on specific information system components.
Checks: C-25683r516429_chk

Check HMC, VM, and z/OS on how to validate and determine a DASD volume(s) is shared. Note: In VM issue the command "QUEUE DASD SYSTEM" this display will show shared volume(s) and indicates the number of systems sharing the volume. Validate all machines that require access to these shared volume(s) have the volume(s) mounted. Obtain a map or list VTOC of the shared volume(s). Check if shared volume(s) contain any critical or sensitive data sets. Identify shared and critical or sensitive data sets on the system being audited. These data sets can be APF, LINKLIST, LPA, Catalogs, etc, as well as product data sets. If all of the critical or sensitive data sets identified on shared volume(s) are protected and justified to be on shared volume(s), this is not a finding. List critical or sensitive data sets are possible security breaches, if not justified and not protected on systems having access to the data set(s) and on shared volume(s).

Fix: F-25671r516430_fix

Configure all identified volumes of shared DASD to be valid within the following. HMC VM z/OS If the shared volume(s) are valid and systems having access to these shared volume(s) are valid, map disk/VTOC list to obtain data sets on the shared volume(s). From this list obtain a list of sensitive and critical system data sets that are found on the shared volume(s). Ensure that the data sets are justified to be shared on the system and to reside on the shared volume(s). The ISSO will review all access requirements to validate that sensitive and critical system data sets are protected from unauthorized access across all systems that have access to the shared volume(s). Protecting the data set(s) whether the data set(s) are used or not used on the systems that have the shared volume(s) available to them.

b
The IBM z/OS Policy Agent must contain a policy that manages excess capacity, bandwidth, or other redundancy to limit the effects of information flooding types of denial-of-service (DoS) attacks.
SC-5 - Medium - CCI-001095 - V-224011 - SV-224011r877852_rule
RMF Control
SC-5
Severity
Medium
CCI
CCI-001095
Version
TSS0-OS-000150
Vuln IDs
  • V-224011
  • V-98731
Rule IDs
  • SV-224011r877852_rule
  • SV-107835
DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity.
Checks: C-25684r516432_chk

Examine the Policy Agent policy statements. If it can be determined that there are policy statements that manages excess capacity, this is not a finding.

Fix: F-25672r516433_fix

Develop Policy application and Policy agent to manage excess capacity.

b
The IBM z/OS System Administrator must develop a process to notify appropriate personnel when accounts are created.
AC-2 - Medium - CCI-001683 - V-224013 - SV-224013r877853_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-001683
Version
TSS0-OS-000170
Vuln IDs
  • V-224013
  • V-98735
Rule IDs
  • SV-224013r877853_rule
  • SV-107839
Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create a new account. Notification of account creation is one method for mitigating this risk. A comprehensive account management process will ensure an audit trail which documents the creation of operating system user accounts and notifies administrators and ISSOs that it exists. Such a process greatly reduces the risk that accounts will be surreptitiously created and provides logging that can be used for forensic purposes. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.
Checks: C-25686r516438_chk

Ask the system Administrator for the documented process to notify appropriate personnel when accounts are created. If there is no documented process, this is a finding.

Fix: F-25674r516439_fix

Develop a documented process to notify appropriate personnel when accounts are created.

b
The IBM z/OS System Administrator must develop a process to notify appropriate personnel when accounts are modified.
AC-2 - Medium - CCI-001684 - V-224014 - SV-224014r877854_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-001684
Version
TSS0-OS-000180
Vuln IDs
  • V-224014
  • V-98737
Rule IDs
  • SV-224014r877854_rule
  • SV-107841
Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create a new account. Notification of account creation is one method for mitigating this risk. A comprehensive account management process will ensure an audit trail which documents the creation of operating system user accounts and notifies administrators and ISSOs that it exists. Such a process greatly reduces the risk that accounts will be surreptitiously created and provides logging that can be used for forensic purposes. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.
Checks: C-25687r516441_chk

Ask the system Administrator for the documented process to notify appropriate personnel when accounts are modified. If there is no documented process, this is a finding.

Fix: F-25675r516442_fix

Develop a documented process to notify appropriate personnel when accounts are modified.

b
The IBM z/OS System Administrator must develop a process to notify appropriate personnel when accounts are deleted.
AC-2 - Medium - CCI-001685 - V-224015 - SV-224015r877855_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-001685
Version
TSS0-OS-000190
Vuln IDs
  • V-224015
  • V-98739
Rule IDs
  • SV-224015r877855_rule
  • SV-107843
When operating system accounts are disabled, user accessibility is affected. Accounts are utilized for identifying individual operating system users or for identifying the operating system processes themselves. Sending notification of account disabling events to the system administrator and ISSO is one method for mitigating this risk. Such a capability greatly reduces the risk that operating system accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.
Checks: C-25688r516444_chk

Ask the system Administrator for the documented process to notify appropriate personnel when accounts are deleted. If there is no documented process, this is a finding.

Fix: F-25676r516445_fix

Develop a documented process to notify appropriate personnel when accounts are deleted.

b
The IBM z/OS System Administrator must develop a process to notify appropriate personnel when accounts are removed.
AC-2 - Medium - CCI-001686 - V-224016 - SV-224016r877856_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-001686
Version
TSS0-OS-000200
Vuln IDs
  • V-224016
  • V-98741
Rule IDs
  • SV-224016r877856_rule
  • SV-107845
When operating system accounts are disabled, user accessibility is affected. Accounts are utilized for identifying individual operating system users or for identifying the operating system processes themselves. Sending notification of account disabling events to the system administrator and ISSO is one method for mitigating this risk. Such a capability greatly reduces the risk that operating system accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.
Checks: C-25689r516447_chk

Ask the system Administrator for the documented process to notify appropriate personnel when accounts are removed. If there is no documented process, this is a finding.

Fix: F-25677r516448_fix

Develop a documented process to notify appropriate personnel when accounts are removed.

c
Unsupported IBM z/OS system software must not be installed and/or active on the system.
CM-7 - High - CCI-001764 - V-224017 - SV-224017r877857_rule
RMF Control
CM-7
Severity
High
CCI
CCI-001764
Version
TSS0-OS-000210
Vuln IDs
  • V-224017
  • V-98743
Rule IDs
  • SV-224017r877857_rule
  • SV-107847
Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may provide a capability that runs counter to the mission or provides users with functionality that exceeds mission requirements. This includes functions and services installed at the operating system level. Some of the programs, installed by default, may be harmful or may not be necessary to support essential organizational operations (e.g., key missions, functions). Removal of executable programs is not always possible; therefore, establishing a method of preventing program execution is critical to maintaining a secure system baseline. Methods for complying with this requirement include restricting execution of programs in certain environments, while preventing execution in other environments; or limiting execution of certain program functionality based on organization-defined criteria (e.g., privileges, subnets, sandboxed environments, or roles).
Checks: C-25690r868990_chk

This check applies to all products that meet the following criteria: - Uses authorized and restricted z/OS interfaces by utilizing Authorized Program Facility (APF) authorized modules or libraries. - Requires access to system data sets or sensitive information or requires special or privileged authority to run. For the products in the above category, refer to the vendor's support lifecycle information for current versions and releases. If the software products currently running on the reviewed system are at a version greater than or equal to the products listed in the vendor's Support Lifecycle information, this is not a finding.

Fix: F-25678r868991_fix

For all products that meet the following criteria: - Uses authorized and restricted z/OS interfaces by utilizing Authorized Program Facility (APF) authorized modules or libraries. - Requires access to system data sets or sensitive information or requires special or privileged authority to run. The ISSO will ensure that unsupported system software for the products in the above category is removed or upgraded prior to a vendor dropping support. Authorized software that is NO longer supported is a CAT I vulnerability. The customer and site will be given six months to mitigate the risk, develop a supported solution, or obtain a formal letter approving such risk/software.

b
IBM z/OS must not allow nonexistent or inaccessible Link Pack Area (LPA) libraries.
CM-7 - Medium - CCI-001764 - V-224018 - SV-224018r877858_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001764
Version
TSS0-OS-000220
Vuln IDs
  • V-224018
  • V-98745
Rule IDs
  • SV-224018r877858_rule
  • SV-107849
Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may provide a capability that runs counter to the mission or provides users with functionality that exceeds mission requirements. This includes functions and services installed at the operating system level. Some of the programs, installed by default, may be harmful or may not be necessary to support essential organizational operations (e.g., key missions, functions). Removal of executable programs is not always possible; therefore, establishing a method of preventing program execution is critical to maintaining a secure system baseline. Methods for complying with this requirement include restricting execution of programs in certain environments, while preventing execution in other environments; or limiting execution of certain program functionality based on organization-defined criteria (e.g., privileges, subnets, sandboxed environments, or roles).
Checks: C-25691r516453_chk

From an ISPF Command line enter: TSO ISRDDN LPA Review the list. If there are any DUMMY entries, i.e., inaccessible LPA libraries, this is a finding.

Fix: F-25679r516454_fix

Review all entries contained in the LPA members for the actual existence of each library. Develop a plan of action to correct deficiencies. The system Link Pack Area (LPA) is the component of MVS that maintains core operating system functions resident in main storage. A security concern exists when libraries from which LPA modules are obtained require APF authorization. Control over residence in the LPA is specified within the operating system in the following members of the data set SYS1.PARMLIB: - LPALSTxx specifies the names of libraries to be concatenated to SYS1.LPALIB when the LPA is generated at IPL in an MVS/XA or MVS/ESA system. (The xx is the suffix designated by the LPA parameter in the IEASYSxx member of SYS1.PARMLIB or overridden by the computer operator at system initial program load [IPL].) - IEAFIXxx specifies the names of modules from SYS1.SVCLIB, the LPALSTxx concatenation, and the LNKLSTxx concatenation that are to be temporarily fixed in central storage in the Fixed LPA (FLPA) for the duration of an IPL. (The xx is the suffix designated by the FIX parameter in the IEASYSxx member of SYS1.PARMLIB or overridden by the computer operator at IPL.) - IEALPAxx specifies the names of modules that will be loaded from the following: ? SYS1.SVCLIB ? The LPALSTxx concatenation ? The LNKLSTxx concatenation as a temporary extension to the existing Pageable LPA (PLPA) in the Modified LPA (MLPA) for the duration of an IPL. (The xx is the suffix designated by the MLPA parameter in the IEASYSxx member of SYS1.PARMLIB or overridden by the computer operator at IPL.) Use the following recommendations and techniques to control the exposures created by the LPA facility: -The LPALSTxx, IEAFIXxx, and IEALPAxx members will contain only required libraries. On a semiannual basis, Software Support should review the volume serial numbers and verify them in accordance with the system catalog. Software Support will remove all non-existent libraries. The ISSO should modify and/or delete the rules associated with these libraries.

b
IBM z/OS must not allow nonexistent or inaccessible LINKLIST libraries.
CM-7 - Medium - CCI-001764 - V-224019 - SV-224019r877859_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001764
Version
TSS0-OS-000225
Vuln IDs
  • V-224019
  • V-100515
Rule IDs
  • SV-224019r877859_rule
  • SV-109619
Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may provide a capability that runs counter to the mission or provides users with functionality that exceeds mission requirements. This includes functions and services installed at the operating system level. Some of the programs, installed by default, may be harmful or may not be necessary to support essential organizational operations (e.g., key missions, functions). Removal of executable programs is not always possible; therefore, establishing a method of preventing program execution is critical to maintaining a secure system baseline. Methods for complying with this requirement include restricting execution of programs in certain environments, while preventing execution in other environments; or limiting execution of certain program functionality based on organization-defined criteria (e.g., privileges, subnets, sandboxed environments, or roles).
Checks: C-25692r516456_chk

From and ISPF Command line enter: TSO ISRDDN LINKLIST Review the list, if there are any DUMMY entries i.e., inaccessible LINKLIST libraries, this is a finding.

Fix: F-25680r516457_fix

Review all entries contained in the LINKLIST for the actual existence of each library. Develop a plan of action to correct deficiencies. The Linklist is a default set of libraries that MVS searches for a specified program. This facility is used so that a user does not have to know the library names in which utility types of programs are stored. Control over membership in the Linklist is specified within the operating system. The data set SYS1.PARMLIB(LNKLSTxx) is used to specify the library names. (The xx is the suffix designated by the LNK parameter in the IEASYSxx member of SYS1.PARMLIB, or overridden by the computer operator at IPL.) Use the following recommendations and techniques to control the exposures created by the LINKLIST facility: 441-1Avoid inclusion of sensitive libraries in the LNKLSTxx member unless absolutely required. -The LNKLSTxx and PROGxx (LNKLST entries) members will contain only required libraries. On a semiannual basis, Software Support should review the volume serial numbers, and should verify them in accordance with the system catalog. Software Support will remove all nonexistent libraries. The ISSO should modify and/or delete the rules associated with these libraries.

c
CA-TSS must be installed and properly configured.
CM-5 - High - CCI-001813 - V-224020 - SV-224020r877860_rule
RMF Control
CM-5
Severity
High
CCI
CCI-001813
Version
TSS0-OS-000230
Vuln IDs
  • V-224020
  • V-98747
Rule IDs
  • SV-224020r877860_rule
  • SV-107851
Failure to provide logical access restrictions associated with changes to system configuration may have significant effects on the overall security of the system. When dealing with access restrictions pertaining to change control, it should be noted that any changes to the hardware, software, and/or firmware components of the operating system can have significant effects on the overall security of the system. Accordingly, only qualified and authorized individuals should be allowed to obtain access to operating system components for the purposes of initiating changes, including upgrades and modifications. Logical access restrictions include, for example, controls that restrict access to workflow automation, media libraries, abstract layers (e.g., changes implemented into third-party interfaces rather than directly into information systems), and change windows (e.g., changes occur only during specified times, making unauthorized changes easy to discover).
Checks: C-25693r516459_chk

Refer to the active tasks on the system. Use IBM SDSF or the system Log. If CA-TSS is active this is not a finding.

Fix: F-25681r516460_fix

Ensure that CA-TSS is active on the system.

b
IBM z/OS SMF collection files (system MANx data sets or LOGSTREAM DASD) must have storage capacity to store at least one weeks worth of audit data.
AU-4 - Medium - CCI-001849 - V-224021 - SV-224021r877861_rule
RMF Control
AU-4
Severity
Medium
CCI
CCI-001849
Version
TSS0-OS-000240
Vuln IDs
  • V-224021
  • V-98749
Rule IDs
  • SV-224021r877861_rule
  • SV-107853
In order to ensure operating systems have a sufficient storage capacity in which to write the audit logs, operating systems need to be able to allocate audit record storage capacity. The task of allocating audit record storage capacity is usually performed during initial installation of the operating system.
Checks: C-25694r516462_chk

Review the SMF dump procedure in there system. If the output data sets in the procedure have storage capacity to store at least one weeks' worth of audit data, this is not a finding.

Fix: F-25682r516463_fix

The system Link Pack Area (LPA) is the component of MVS that maintains core operating system functions resident in main storage. A security concern exists when libraries from which LPA modules are obtained require APF authorization.

b
IBM z/OS System Administrators must develop an automated process to collect and retain SMF data.
AU-4 - Medium - CCI-001851 - V-224022 - SV-224022r877862_rule
RMF Control
AU-4
Severity
Medium
CCI
CCI-001851
Version
TSS0-OS-000250
Vuln IDs
  • V-224022
  • V-98751
Rule IDs
  • SV-224022r877862_rule
  • SV-107855
Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity.
Checks: C-25695r516465_chk

Ask the system administrator if there is an automated process is in place to collect and retain all SMF data produced on the system. If, based on the information provided, it can be determined that an automated process is in place to collect and retain all SMF data produced on the system, this is not a finding. If it cannot be determined this process exists and is being adhered to, this is a finding.

Fix: F-25683r516466_fix

Ensure that an automated process is in place to collect SMF data. Review SMF data collection and retention processes. Develop processes that are automatically started to dump SMF collection files immediately upon their becoming full. To ensure that all SMF data is collected in a timely manner, and to reduce the risk of data loss, ensure that automated mechanisms are in place to collect and retain all SMF data produced on the system. Dump the SMF files (MANx) in systems based on the following guidelines: -Dump each SMF file as it fills up during the normal course of daily processing. -Dump all remaining SMF data at the end of each processing day. Establish a process using Audit logging.

b
The IBM z/OS SNTP daemon (SNTPD) must be active.
AU-8 - Medium - CCI-001891 - V-224023 - SV-224023r877863_rule
RMF Control
AU-8
Severity
Medium
CCI
CCI-001891
Version
TSS0-OS-000270
Vuln IDs
  • V-224023
  • V-98755
Rule IDs
  • SV-224023r877863_rule
  • SV-107859
Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. Organizations should consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints).
Checks: C-25696r868993_chk

From UNIX System Services ISPF Shell, navigate to ribbon select tools. Select option 1 - Work with Processes. If SNTP Daemon (SNTPD) is not active, this is a finding.

Fix: F-25684r868994_fix

Obtain a copy of this sample procedure from SEZAINST and store it in one of your PROCLIB concatenation data sets. Perform the following step to start SNTPD as a procedure: Invoke the procedure using the system operator start command. The following sample, SEZAINST(SNTPD), shows how to start SNTPD as a procedure: //* //* Sample procedure for the Simple Network Time Protocol (SNTP) //* //* z/OS Communications Server Version 1 Release 13 //* SMP/E Distribution Name: SEZAINST(EZASNPRO) //* //* Copyright: Licensed Materials - Property of IBM //* 5650-ZOS //* Copyright IBM Corp. 2002, 2015 //* //* Status: CSV2R2 //* //SNTPD EXEC PGM=SNTPD,REGION=4096K,TIME=NOLIMIT, // PARM='/ -d' //SYSPRINT DD SYSOUT=*,DCB=(RECFM=F,LRECL=132,BLKSIZE=132) //SYSIN DD DUMMY //SYSERR DD SYSOUT=* //SYSOUT DD SYSOUT=*,DCB=(RECFM=F,LRECL=132,BLKSIZE=132) //CEEDUMP DD SYSOUT=* //SYSABEND DD SYSOUT=*

b
IBM z/OS SNTP daemon (SNTPD) permission bits must be properly configured.
AU-8 - Medium - CCI-001891 - V-224024 - SV-224024r877864_rule
RMF Control
AU-8
Severity
Medium
CCI
CCI-001891
Version
TSS0-OS-000280
Vuln IDs
  • V-224024
  • V-98757
Rule IDs
  • SV-224024r877864_rule
  • SV-107861
Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. Organizations should consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints).
Checks: C-25697r516471_chk

From the ISPF Command Shell enter: cd /usr/sbin ls -al If the following File permission and user Audit Bits are true, this is not a finding. /usr/sbin/sntpd 1740 faf The following represents a hierarchy for permission bits from least restrictive to most restrictive: 7 rwx (least restrictive) 6 rw- 3 -wx 2 -w- 5 r-x 4 r-- 1 --x 0 --- (most restrictive) The possible audit bits settings are as follows: f log for failed access attempts a log for failed and successful access - no auditing

Fix: F-25685r516472_fix

With the assistance of a systems programmer with UID(0) and/or SUPERUSER access, configure the UNIX permission bits and user audit bits on the SNTPD to conform to the specifications below: /usr/sbin/sntpd 1740 faf

b
IBM z/OS PARMLIB CLOCKxx must have the Accuracy PARM coded properly.
AU-8 - Medium - CCI-002046 - V-224025 - SV-224025r877865_rule
RMF Control
AU-8
Severity
Medium
CCI
CCI-002046
Version
TSS0-OS-000290
Vuln IDs
  • V-224025
  • V-98759
Rule IDs
  • SV-224025r877865_rule
  • SV-107863
Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. Organizations should consider setting time periods for different types of systems (e.g., financial, legal, or mission-critical systems). Organizations should also consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints). This requirement is related to the comparison done every 24 hours in SRG-OS-000355 because a comparison must be done in order to determine the time difference.
Checks: C-25698r516474_chk

Refer to the CLOCKxx member of PARMLIB. If the ACCURACY parm is not coded, this is a finding. If the ACCURACY parm is coded to "1000", this is not a finding.

Fix: F-25686r516475_fix

Define the CLOCKxx statement to include the ACCURACY parm set to "1000".

b
The IBM z/OS Policy Agent must contain a policy that protects against or limits the effects of denial-of-service (DoS) attacks by ensuring IBM z/OS is implementing rate-limiting measures on impacted network interfaces.
SC-5 - Medium - CCI-002385 - V-224026 - SV-224026r877866_rule
RMF Control
SC-5
Severity
Medium
CCI
CCI-002385
Version
TSS0-OS-000300
Vuln IDs
  • V-224026
  • V-98761
Rule IDs
  • SV-224026r877866_rule
  • SV-107865
DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. This requirement addresses the configuration of the operating system to mitigate the impact of DoS attacks that have occurred or are ongoing on system availability. For each system, known and potential DoS attacks must be identified and solutions for each type implemented. A variety of technologies exist to limit or, in some cases, eliminate the effects of DoS attacks (e.g., limiting processes or establishing memory partitions). Employing increased capacity and bandwidth, combined with service redundancy, may reduce the susceptibility to some DoS attacks.
Checks: C-25699r516477_chk

Examine the "Policy Agent" policy statements. If it can be determined that the policy that protects against or limits the effects of denial-of-service (DoS) attacks by ensuring the operating system is implementing rate-limiting measures on impacted network interfaces, this is not a finding.

Fix: F-25687r516478_fix

Develop "Policy Agent" statements to protect against or limit the effects of denial-of-service (DoS) attacks by ensuring the operating system is implementing rate-limiting measures on impacted network interfaces.

b
IBM z/OS must configure system wait times to protect resource availability based on site priorities.
CM-6 - Medium - CCI-000366 - V-224031 - SV-224031r877869_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
TSS0-OS-000350
Vuln IDs
  • V-224031
  • V-98771
Rule IDs
  • SV-224031r877869_rule
  • SV-107875
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.
Checks: C-25704r868996_chk

Refer to IEASYS00 member in SYS1.PARMLIB Concatenation. Determine proper SMFPRMxx member. Examine the JWT, SWT, and TWT values. If the JWT parameter is greater than "15" minutes, and the system is processing unclassified information, review the following items. If any of these items is true, this is not a finding. -If a session is not terminated, but instead is locked out after 15 minutes of inactivity, a process must be in place that requires user identification and authentication before the session is unlocked. Session lock-out will be implemented through system controls or terminal screen protections. -A system's default time for terminal lock-out or session termination may be lengthened to 30 minutes at the discretion of the ISSM or ISSO. The ISSM and/or ISSO will maintain the documentation for each system with a time-out adjusted beyond the 15-minute recommendation to explain the basis for this decision. -The ISSM and/or ISSO may set selected userids to have a time-out of up to 60 minutes in order to complete critical reports or transactions without timing out. Each exception must meet the following criteria: -The time-out exception cannot exceed 60 minutes. -A letter of justification fully documenting the user requirement(s) must be submitted and approved by the site ISSM or ISSO. In addition, this letter must identify an alternate means of access control for the terminal(s) involved (e.g., a room that is locked at all times, a room with a cipher lock to limit access, a password protected screen saver set to 30 minutes or less, etc.). -The requirement must be revalidated on an annual basis. If the TWT and SWT values are equal or less than the JWT value, this is not a finding.

Fix: F-25692r868997_fix

Configure the SMFPRMxx JWT to "15" minutes for classified systems. The JWT parameter can be greater than "15" minutes if the system is processing unclassified information and the following items are reviewed. -If a session is not terminated, but instead is locked out after "15" minutes of inactivity, a process must be in place that requires user identification and authentication before the session is unlocked. Session lock-out will be implemented through system controls or terminal screen protections. -A system's default time for terminal lock-out or session termination may be lengthened to "30" minutes at the discretion of the ISSM or ISSO. The ISSM and/or ISSO will maintain the documentation for each system with a time-out adjusted beyond the 15-minute recommendation to explain the basis for this decision. -The ISSM and/or ISSO may set selected userids to have a time-out of up to "60" minutes in order to complete critical reports or transactions without timing out. Each exception must meet the following criteria: -The time-out exception cannot exceed "60" minutes. -A letter of justification fully documenting the user requirement(s) must be submitted and approved by the site ISSM or ISSO. In addition, this letter must identify an alternate means of access control for the terminal(s) involved (e.g., a room that is locked at all times, a room with a cipher lock to limit access, a password protected screen saver set to 30 minutes or less, etc.). -The requirement must be revalidated on an annual basis. Configure any TWT and or SWT to be equal or less than the JWT.

b
IBM z/OS must employ a session manager to conceal, via the session lock, information previously visible on the display with a publicly viewable image.
AC-11 - Medium - CCI-000060 - V-224032 - SV-224032r877870_rule
RMF Control
AC-11
Severity
Medium
CCI
CCI-000060
Version
TSS0-OS-000360
Vuln IDs
  • V-224032
  • V-98773
Rule IDs
  • SV-224032r877870_rule
  • SV-107877
A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. The operating system session lock event must include an obfuscation of the display screen so as to prevent other users from reading what was previously displayed. Publicly viewable images can include static or dynamic images, for example, patterns used with screen savers, photographic images, solid colors, a clock, a battery life indicator, or a blank screen, with the additional caveat that none of the images convey sensitive information.
Checks: C-25705r516495_chk

Ask the system administrator for the configuration parameters for the session manager in use. If there is no session manager in use, this is a finding. If the session manager is not configured to conceal, via the session lock, information previously visible on the display with a publicly viewable image, this is a finding.

Fix: F-25693r516496_fix

Configure the session manager to conceal, via the session lock, information previously visible on the display with a publicly viewable image.

b
IBM z/OS must employ a session manager to initiate a session lock after a 15-minute period of inactivity for all connection types.
AC-11 - Medium - CCI-000057 - V-224033 - SV-224033r877871_rule
RMF Control
AC-11
Severity
Medium
CCI
CCI-000057
Version
TSS0-OS-000370
Vuln IDs
  • V-224033
  • V-98775
Rule IDs
  • SV-224033r877871_rule
  • SV-107879
A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock. The session lock is implemented at the point where session activity can be determined and/or controlled.
Checks: C-25706r516498_chk

Ask the system administrator for the configuration parameters for the session manager in use. If there is no session manager in use, this is a finding. If the session manager is not configured to initiate a session lock after a 15-minute period of inactivity, this is a finding.

Fix: F-25694r516499_fix

Configure the session manager to initiate a session lock after a 15-minute period of inactivity.

b
IBM z/OS must employ a session manager to manage retaining a users session lock until that user reestablishes access using established identification and authentication procedures.
AC-11 - Medium - CCI-000056 - V-224034 - SV-224034r877872_rule
RMF Control
AC-11
Severity
Medium
CCI
CCI-000056
Version
TSS0-OS-000380
Vuln IDs
  • V-224034
  • V-98777
Rule IDs
  • SV-224034r877872_rule
  • SV-107881
A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. Regardless of where the session lock is determined and implemented, once invoked, the session lock must remain in place until the user re-authenticates. No other activity aside from re-authentication will unlock the system.
Checks: C-25707r516501_chk

Ask the system administrator for the configuration parameters for the session manager in use. If there is no session manager in use, this is a finding. If the session manager is not configured to retain a user's session lock until that user reestablishes access using established identification and authentication procedures, this is a finding.

Fix: F-25695r516502_fix

LPA (PLPA) in the Modified LPA (MLPA) for the duration of an IPL. (The xx is the suffix designated by the MLPA parameter in the IEASYSxx member of SYS1.PARMLIB or overridden by the computer operator at IPL.)

b
IBM z/OS system administrator must develop a procedure to remove or disable temporary user accounts after 72 hours.
AC-2 - Medium - CCI-000016 - V-224035 - SV-224035r877873_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-000016
Version
TSS0-OS-000390
Vuln IDs
  • V-224035
  • V-98779
Rule IDs
  • SV-224035r877873_rule
  • SV-107883
If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain unauthorized access. To mitigate this risk, automated termination of all temporary accounts must be set upon account creation. Temporary accounts are established as part of normal account activation procedures when there is a need for short-term accounts without the demand for immediacy in account activation. If temporary accounts are used, the operating system must be configured to automatically terminate these types of accounts after a DoD-defined time period of 72 hours. To address access requirements, many operating systems may be integrated with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements.
Checks: C-25708r516504_chk

Ask the system administrator for the procedure to automatically remove or disable temporary user accounts after 72 hours. If there is no procedure, this is a finding.

Fix: F-25696r516505_fix

Develop a procedure to remove or disable emergency user accounts after the crisis is resolved or 72 hours.

b
IBM z/OS system administrator must develop a procedure to remove or disable emergency accounts after the crisis is resolved or 72 hours.
AC-2 - Medium - CCI-001682 - V-224036 - SV-224036r877874_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-001682
Version
TSS0-OS-000400
Vuln IDs
  • V-224036
  • V-102937
Rule IDs
  • SV-224036r877874_rule
  • SV-111899
Emergency accounts are privileged accounts that are established in response to crisis situations where the need for rapid account activation is required. Therefore, emergency account activation may bypass normal account authorization processes. If these accounts are automatically disabled, system maintenance during emergencies may not be possible, thus adversely affecting system availability. Emergency accounts are different from infrequently used accounts (i.e., local logon accounts used by the organization's system administrators when network or normal logon/access is not available). Infrequently used accounts are not subject to automatic termination dates. Emergency accounts are accounts created in response to crisis situations, usually for use by maintenance personnel. The automatic expiration or disabling time period may be extended as needed until the crisis is resolved; however, it must not be extended indefinitely. A permanent account should be established for privileged users who need long-term maintenance accounts. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements.
Checks: C-25709r516507_chk

Ask the system administrator for the procedure to automatically remove or disable emergency accounts after the crisis is resolved or 72 hours. If there is no procedure, this is a finding.

Fix: F-25697r516508_fix

Develop a procedure to remove or disable emergency user accounts after the crisis is resolved or 72 hours.

b
IBM z/OS system administrator must develop a procedure to notify System Administrators and ISSOs of account enabling actions.
AC-2 - Medium - CCI-002132 - V-224037 - SV-224037r877875_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-002132
Version
TSS0-OS-000410
Vuln IDs
  • V-224037
  • V-98781
Rule IDs
  • SV-224037r877875_rule
  • SV-107885
Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to enable an existing disabled account. Sending notification of account enabling actions to the System Administrator and ISSO is one method for mitigating this risk. Such a capability greatly reduces the risk that operating system accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes. In order to detect and respond to events that affect user accessibility and application processing, operating systems must audit account enabling actions and, as required, notify the appropriate individuals so they can investigate the event. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.
Checks: C-25710r516510_chk

Ask the system administrator for the procedure to notify system administrators and ISSOs of account enabling actions. If there is no procedure, this is a finding.

Fix: F-25698r516511_fix

Develop a documented procedure to notify system administrators and ISSOs of account enabling actions.

b
IBM z/OS system administrator must develop a procedure to notify designated personnel if baseline configurations are changed in an unauthorized manner.
CM-3 - Medium - CCI-001744 - V-224038 - SV-224038r877876_rule
RMF Control
CM-3
Severity
Medium
CCI
CCI-001744
Version
TSS0-OS-000420
Vuln IDs
  • V-224038
  • V-98783
Rule IDs
  • SV-224038r877876_rule
  • SV-107887
Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the operating system. Changes to operating system configurations can have unintended side effects, some of which may be relevant to security. Detecting such changes and providing an automated response can help avoid unintended, negative consequences that could ultimately affect the security state of the operating system. The operating system's IMO/ISSO and SAs must be notified via email and/or monitoring system trap when there is an unauthorized modification of a configuration item.
Checks: C-25711r516513_chk

Ask the system administrator for the procedure to notify designated personnel if baseline configurations are changed in an unauthorized manner. If there is no procedure, this is a finding.

Fix: F-25699r516514_fix

Develop a procedure to notify designated personnel if baseline configurations are changed in an unauthorized manner.

b
IBM z/OS system administrator must develop a procedure to terminate all sessions and network connections related to nonlocal maintenance when nonlocal maintenance is completed.
MA-4 - Medium - CCI-000879 - V-224039 - SV-224039r877877_rule
RMF Control
MA-4
Severity
Medium
CCI
CCI-000879
Version
TSS0-OS-000440
Vuln IDs
  • V-224039
  • V-98785
Rule IDs
  • SV-224039r877877_rule
  • SV-107889
If a maintenance session or connection remains open after maintenance is completed, it may be hijacked by an attacker and used to compromise or damage the system. Some maintenance and test tools are either standalone devices with their own operating systems or are applications bundled with an operating system. Nonlocal maintenance and diagnostic activities are those activities conducted by individuals communicating through a network, either an external network (e.g., the Internet) or an internal network. Local maintenance and diagnostic activities are those activities carried out by individuals physically present at the information system or information system component and not communicating across a network connection.
Checks: C-25712r516516_chk

Ask the system administrator for the procedure to terminate all sessions and network connections related to nonlocal maintenance when nonlocal maintenance is completed. If there is no procedure, this is a finding.

Fix: F-25700r516517_fix

Develop a procedure to terminate all sessions and network connections related to nonlocal maintenance when nonlocal maintenance is completed.

b
IBM z/OS system administrator must develop a procedure to remove all software components after updated versions have been installed.
SI-2 - Medium - CCI-002617 - V-224040 - SV-224040r877878_rule
RMF Control
SI-2
Severity
Medium
CCI
CCI-002617
Version
TSS0-OS-000450
Vuln IDs
  • V-224040
  • V-98787
Rule IDs
  • SV-224040r877878_rule
  • SV-107891
Previous versions of software components that are not removed from the information system after updates have been installed may be exploited by adversaries. Some information technology products may remove older versions of software automatically from the information system.
Checks: C-25713r516519_chk

Ask the system administrator for the procedure to remove all software components after updated versions have been installed. If there is no procedure, this is a finding.

Fix: F-25701r516520_fix

Develop a procedure to remove all software components after updated versions have been installed.

b
IBM z/OS system administrator must develop a procedure to shut down the information system, restart the information system, and/or notify the system administrator when anomalies in the operation of any security functions are discovered.
SI-6 - Medium - CCI-002702 - V-224041 - SV-224041r877879_rule
RMF Control
SI-6
Severity
Medium
CCI
CCI-002702
Version
TSS0-OS-000460
Vuln IDs
  • V-224041
  • V-98789
Rule IDs
  • SV-224041r877879_rule
  • SV-107893
If anomalies are not acted upon, security functions may fail to secure the system. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. Notifications provided by information systems include messages to local computer consoles, and/or hardware indications, such as lights. This capability must take into account operational requirements for availability for selecting an appropriate response. The organization may choose to shut down or restart the information system upon security function anomaly detection.
Checks: C-25714r516522_chk

Ask the system administrator for the procedure to shut down the information system, restart the information system, and/or notify the system administrator when anomalies occur. If a procedure does not exist, this is a finding. If the procedure does not properly shut down the information system, restart the information system, and/or notify the system administrator when anomalies occur, this is a finding.

Fix: F-25702r516523_fix

Develop a procedure to shut down the information system, restart the information system, and/or notify the system administrator when anomalies occur.

b
IBM z/OS system administrator must develop a procedure to offload SMF files to a different system or media than the system being audited.
AU-4 - Medium - CCI-001851 - V-224042 - SV-224042r877880_rule
RMF Control
AU-4
Severity
Medium
CCI
CCI-001851
Version
TSS0-OS-000470
Vuln IDs
  • V-224042
  • V-98791
Rule IDs
  • SV-224042r877880_rule
  • SV-107895
The task of allocating audit record storage capacity is usually performed during initial installation of the operating system.
Checks: C-25715r516525_chk

Ask the system administrator for the procedure to offload SMF files to a different system or media than the system being audited. If the procedure does not exist, this is a finding.

Fix: F-25703r516526_fix

Develop a procedure to offload SMF files to a different system or media than the system being audited.

b
IBM z/OS must employ a session manager for users to directly initiate a session lock for all connection types.
AC-11 - Medium - CCI-000058 - V-224043 - SV-224043r877881_rule
RMF Control
AC-11
Severity
Medium
CCI
CCI-000058
Version
TSS0-OS-000480
Vuln IDs
  • V-224043
  • V-98793
Rule IDs
  • SV-224043r877881_rule
  • SV-107897
A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. Rather than be forced to wait for a period of time to expire before the user session can be locked, operating systems need to provide users with the ability to manually invoke a session lock so users may secure their session should the need arise for them to temporarily vacate the immediate physical vicinity.
Checks: C-25716r516528_chk

Ask the system administrator for the configuration parameters for the session manager in use. If there is no session manager in use this is a finding. If the session manager in use does not allow users to directly initiate a session lock for all connection types, this is a finding.

Fix: F-25704r516529_fix

Configure the session manager to allow users to directly initiate a session lock for all connection types.

c
The SSH daemon must be configured to use a FIPS 140-2 compliant cryptographic algorithm.
AC-17 - High - CCI-000068 - V-224044 - SV-224044r877882_rule
RMF Control
AC-17
Severity
High
CCI
CCI-000068
Version
TSS0-SH-000020
Vuln IDs
  • V-224044
  • V-98795
Rule IDs
  • SV-224044r877882_rule
  • SV-107899
Audit record content that may be necessary to satisfy this requirement includes, for example, time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, filenames involved, and access control or flow control rules invoked. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000120-GPOS-00061, SRG-OS-000250-GPOS-00093
Checks: C-25717r516758_chk

Locate the SSH daemon configuration file which may be found in /etc/ssh/ directory. Alternately: From UNIX System Services ISPF Shell navigate to ribbon select tools. Select option 1 - Work with Processes. If SSH Daemon is not active, this is not a finding. Examine SSH daemon configuration file. sshd_config If there are no Ciphers lines or the ciphers list contains any cipher not starting with "3des" or "aes", this is a finding. If the MACs line is not configured to "hmac-sha1" or greater, this is a finding. Examine the z/OS-specific sshd server system-wide configuration: zos_sshd_config If any of the following is untrue, this is a finding. FIPSMODE=YES CiphersSource=ICSF MACsSource=ICSF

Fix: F-25705r516759_fix

Edit the SSH daemon configuration and remove any ciphers not starting with "3des" or "aes". If necessary, add a "Ciphers" line using FIPS 140-2 compliant algorithms.

c
IBM z/OS SSH daemon must be configured to only use the SSHv2 protocol.
CM-7 - High - CCI-000382 - V-224045 - SV-224045r877883_rule
RMF Control
CM-7
Severity
High
CCI
CCI-000382
Version
TSS0-SH-000030
Vuln IDs
  • V-224045
  • V-98797
Rule IDs
  • SV-224045r877883_rule
  • SV-107901
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
Checks: C-25718r516534_chk

Locate the SSH daemon configuration file. May be found in /etc/ssh/ directory. Alternately: From UNIX System Services ISPF Shell navigate to ribbon select tools. Select option 1 - Work with Processes. If SSH Daemon is not active, this is not a finding. Examine SSH daemon configuration file. If the variables "Protocol 2,1" or "Protocol 1" are defined on a line without a leading comment, this is a finding.

Fix: F-25706r516535_fix

Edit the sshd_config file and set the "Protocol" setting to "2".

b
IBM z/OS permission bits and user audit bits for HFS objects that are part of the Syslog daemon component must be configured properly.
AC-3 - Medium - CCI-000213 - V-224046 - SV-224046r877884_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-SL-000010
Vuln IDs
  • V-224046
  • V-98799
Rule IDs
  • SV-224046r877884_rule
  • SV-107903
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.
Checks: C-25719r516537_chk

From an ISPF Enter cd /usr/sbin Enter ls -alW If File Permission Bits and User Audit Bits for SYSLOG Daemon HFS directories and files are as below this is not a finding. /usr/sbin/syslogd 1740 fff Enter cd /etc/ Enter ls -alW If File Permission Bits and User Audit Bits for Output log file defined in the configuration file are as below this is not a finding. /etc/syslog.conf 0744 faf 0744 fff Notes: The /usr/sbin/syslogd object is a symbolic link to /usr/lpp/tcpip/sbin/syslogd. The permission and user audit bits on the target of the symbolic link must have the required settings. The /etc/syslog.conf file may not be the configuration file the daemon uses. It is necessary to check the script or JCL used to start the daemon to determine the actual configuration file. For example, in /etc/rc: _BPX_JOBNAME='SYSLOGD' /usr/sbin/syslogd -f /etc/syslog.conf For example, in the SYSLOGD started task JCL: //SYSLOGD EXEC PGM=SYSLOGD,REGION=30M,TIME=NOLIMIT // PARM='POSIX(ON) ALL31(ON)/ -f /etc/syslogd.conf' //SYSLOGD EXEC PGM=SYSLOGD,REGION=30M,TIME=NOLIMIT // PARM='POSIX(ON) ALL31(ON) /-f //''SYS1.TCPPARMS(SYSLOG)''' The following represents a hierarchy for permission bits from least restrictive to most restrictive: 7 rwx (least restrictive) 6 rw- 3 -wx 2 -w- 5 r-x 4 r-- 1 --x 0 --- (most restrictive) The possible audit bits settings are as follows: f log for failed access attempts a log for failed and successful access - no auditing

Fix: F-25707r516538_fix

Configure the UNIX permission bits and user audit bits on the HFS directories and files for the Syslog daemon to conform to the specifications in the SYSLOG Daemon HFS Object Security Settings table below. Log files should have security that prevents anyone except the syslogd process and authorized maintenance jobs from writing to or deleting them. A maintenance process to periodically clear the log files is essential. Logging stops if the target file system becomes full. SYSLOG Daemon HFS Object Security Settings File Permission Bits User Audit Bits /usr/sbin/syslogd 1740 fff [Configuration File] /etc/syslog.conf 0744 faf [Output log file defined in the configuration file] 0744 fff The following represents a hierarchy for permission bits from least restrictive to most restrictive: 7 rwx (least restrictive) 6 rw- 3 -wx 2 -w- 5 r-x 4 r-- 1 --x 0 --- (most restrictive) The possible audit bits settings are as follows: f log for failed access attempts a log for failed and successful access - no auditing NOTES: The /usr/sbin/syslogd object is a symbolic link to /usr/lpp/tcpip/sbin/syslogd. The permission and user audit bits on the target of the symbolic link must have the required settings. The /etc/syslog.conf file may not be the configuration file the daemon uses. It is necessary to check the script or JCL used to start the daemon to determine the actual configuration file. For example, in /etc/rc: _BPX_JOBNAME='SYSLOGD' /usr/sbin/syslogd -f /etc/syslog.conf For example, in the SYSLOGD started task JCL: //SYSLOGD EXEC PGM=SYSLOGD,REGION=30M,TIME=NOLIMIT // PARM='POSIX(ON) ALL31(ON)/ -f /etc/syslogd.conf' //SYSLOGD EXEC PGM=SYSLOGD,REGION=30M,TIME=NOLIMIT // PARM='POSIX(ON) ALL31(ON) /-f //''SYS1.TCPPARMS(SYSLOG)''' The following commands can be used (from a user account with an effective UID(0)) to update the permission bits and audit bits: chmod 1740 /usr/lpp/tcpip/sbin/syslogd chaudit rwx=f /usr/lpp/tcpip/sbin/syslogd chmod 0744 /etc/syslog.conf chaudit w=sf,rx+f /etc/syslog.conf chmod 0744 /log_dir/log_file chaudit rwx=f /log_dir/log_file

b
The IBM z/OS Syslog daemon must not be started at z/OS initialization.
IA-2 - Medium - CCI-000764 - V-224047 - SV-224047r877885_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
TSS0-SL-000020
Vuln IDs
  • V-224047
  • V-98801
Rule IDs
  • SV-224047r877885_rule
  • SV-107905
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25720r516540_chk

SYSLOGD may be started from the shell, a cataloged procedure (STC), or the BPXBATCH program. Additionally, other mechanisms (e.g., a job scheduler) may be used to automatically start the Syslog daemon. To thoroughly analyze this requirement you may need to view the OS SYSLOG using SDSF, find the last IPL, and look for the initialization of SYSLOGD. If the Syslog daemon SYSLOGD is started automatically during the initialization of the z/S/ system, this is not a finding.

Fix: F-25708r516541_fix

Review the files used to initialize tasks during system IPL (e.g., /etc/rc, SYS1.PARMLIB, any job scheduler definitions) configure the Syslog daemon to start automatically during z/OS system initialization. It is important that syslogd be started during the initialization phase of the z/OS system to ensure that significant messages are not lost. As with other z/OS UNIX daemons, there is more than one way to start SYSLOGD. It can be started as a process in the /etc/rc file or as a z/OS started task.

b
The IBM z/OS Syslog daemon must be properly defined and secured.
IA-2 - Medium - CCI-000764 - V-224048 - SV-224048r877886_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
TSS0-SL-000030
Vuln IDs
  • V-224048
  • V-98803
Rule IDs
  • SV-224048r877886_rule
  • SV-107907
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.
Checks: C-25721r868999_chk

From the ISPF Command Shell enter: TSS LIST(SYSLOGD) SEGMENT(OMVS) If the following guidance is true, this is not a finding. -The Syslog daemon userid is SYSLOGD. -The SYSLOGD userid has the STC facility. -The SYSLOGD userid has UID(0), HOME('/'), and PROGRAM('/bin/sh') specified in the OMVS segment. -The SYSLOGD started proc is assigned the SYSLOGD userid is in the Started Task Table. If Syslog daemon is started from /etc/rc then from the ISPF Command Shell enter: OMVS cd /etc cat rc If Syslog daemon is started from /etc/rc then ensure that the "_BPX_JOBNAME" and "_BPX_USERID" environment variables are assigned a value of SYSLOGD. If the Syslog daemon is started from /etc/rc and the "_BPX_JOBNAME" and "_BPX_USERID" environment variables are not assigned a value of SYSLOGD, this is a finding.

Fix: F-25709r869000_fix

Configure so that the Syslog daemon runs under its own user account. Specifically, it does not share the account defined for the z/OS UNIX kernel. The Syslog daemon userid is SYSLOGD. The SYSLOGD userid has the STC facility. The SYSLOGD userid has UID(0), HOME('/'), and PROGRAM('/bin/sh') specified in the OMVS segment. To set up and use as an MVS Started Proc, the following sample commands are provided: TSS CREATE(SYSLOGD) TYPE(USER) NAME(SYSLOGD) - DEPT(existing-dept) FACILITY(STC) - PASSWORD(password,0) TSS ADD(SYSLOGD) DFLTGRP(stctcpx) GROUP(stctcpx) TSS ADD(SYSLOGD) SOURCE(INTRDR) TSS ADD(SYSLOGD) UID(0) HOME(/) OMVSPGM(/bin/sh) The SYSLOGD started proc is assigned the SYSLOGD userid is in the Started Task Table. TSS ADD(STC) PROCNAME(SYSLOGD) ACID(SYSLOGD) If /etc/rc is used to start the Syslog daemon, ensure that the _BPX_JOBNAME and _BPX_ USERID environment variables are assigned a value of SYSLOGD.

b
IBM z/OS DFSMS resources must be protected in accordance with the proper security requirements.
AC-3 - Medium - CCI-000213 - V-224049 - SV-224049r877887_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-SM-000010
Vuln IDs
  • V-224049
  • V-98805
Rule IDs
  • SV-224049r877887_rule
  • SV-107909
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system. Satisfies: SRG-OS-000080-GPOS-00048, SRG-OS-000324-GPOS-00125
Checks: C-25722r869002_chk

If all SMS resources and/or generic equivalent are properly protected according to the requirements specified and the following guidance is true, this is not a finding. The TSS resources are owned or DEFPROT is specified for the resource class. To avoid authorization failures once a base cluster is accessed via a PATH or AIX by a user or application that has authority to the PATH and AIX, but not the base cluster, APAR OA50118 must be applied. The resource STGADMIN.IGG.CATALOG.SECURITY.CHANGE is defined with access of NONE. The resource STGADMIN.IGG.CATALOG.SECURITY.BOTH is defined with access of READ. Note: The resource STGADMIN.IGG.CATALOG.SECURITY.CHANGE can be defined with read access for migration purposes. If it is, a detailed migration plan must be documented and filed by the ISSM that determines a definite migration period. All access must be logged. At the completion of migration, this resource must be configured with access of NONE. If the resource STGADMIN.IGG.CATALOG.SECURITY.CHANGE and STGADMIN.IGG.CATALOG.SECURITY.BOTH are both defined, ADMIN.IGG.CATALOG.SECURITY.BOTH takes precedence. STGADMIN.DPDSRN.olddsname is restricted to system programmers and all access is logged. The STGADMIN.IGD.ACTIVATE.CONFIGURATION is restricted to system programmers and all access is logged. The STGADMIN.IGG.DEFDEL.UALIAS is restricted to centralized and decentralized security personnel and system programmers and all access is logged. The following resources and prefixes may be available to the end user. STGADMIN.ADR.COPY.CNCURRNT STGADMIN.ADR.COPY.FLASHCPY STGADMIN.ADR.COPY.TOLERATE.ENQF STGADMIN.ADR.DUMP.CNCURRNT STGADMIN.ADR.DUMP.TOLERATE.ENQF STGADMIN.ADR.RESTORE.TOLERATE.ENQF STGADMIN.ARC.ENDUSER. STGADMIN.IGG.ALTER.SMS The following resource is restricted to Application Production Support Team members, Automated Operations, DASD managers, and system programmers. STGADMIN.IDC.DCOLLECT The following resources are restricted to Application Production Support Team members, DASD managers, and system programmers. STGADMIN.ARC.CANCEL STGADMIN.ARC.LIST STGADMIN.ARC.QUERY STGADMIN.ARC.REPORT STGADMIN.DMO.CONFIG STGADMIN.IFG.READVTOC STGADMIN.IGG.DELGDG.FORCE The following resource prefixes, at a minimum, are restricted to DASD managers and system programmers. STGADMIN.ADR STGADMIN.ANT STGADMIN.ARC STGADMIN.DMO STGADMIN.ICK STGADMIN.IDC STGADMIN.IFG STGADMIN.IGG STGADMIN.IGWSHCDS The following Storage Administrator functions prefix is restricted to DASD managers and system programmers and all access is logged. STGADMIN.ADR.STGADMIN.

Fix: F-25710r869003_fix

Ensure that the following are properly specified in the ESM. Note: The 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. Below is listed the access requirements for SMS Resources. Ensure the guidelines for the resources and/or generic equivalent are followed. The TSS resources are owned and/or DEFPROT is specified for the resource class. Configure resource STGADMIN.IGG.CATALOG.SECURITY.CHANGE with no access. Note: The resource STGADMIN.IGG.CATALOG.SECURITY.CHANGE can be defined with read access for migration purposes. If it is, a detailed migration plan must be documented and filed with the ISSM that determines a definite migration period. All access must be logged. At the completion of migration this resource must be configured with access = NONE. Configure STGADMIN.IGG.CATALOG.SECURITY.BOTH to have READ access for all. TSS ADD(ADMIN) IBMFAC(STGADMIN) or TSS REPLACE(RDT) RESCLASS(IBMFAC) ATTR(DEFPROT) The STGADMIN.DPDSRN.olddsname is restricted to System Programmers and all access is logged. Example: TSS PERMIT(syspsmpl) IBMFAC(STGADMIN.DPDSRN.olddsname) - ACCESS(READ) ACTION(AUDIT) The STGADMIN.IGD.ACTIVATE.CONFIGURATION is restricted to system programmers and all access is logged. Example: TSS PERMIT(syspsmpl) IBMFAC(STGADMIN.IGD.ACTIVATE.CONFIGURATION) - ACCESS(READ) ACTION(AUDIT) The STGADMIN.IGG.DEFDEL.UALIAS is restricted to system programmers and security personnel and all access is logged. Example: TSS PERMIT(secasmpl) IBMFAC(STGADMIN.IGG.DEFDEL.UALIAS) - ACCESS(READ) ACTION(AUDIT) TSS PERMIT(secdsmpl) IBMFAC(STGADMIN.IGG.DEFDEL.UALIAS) - ACCESS(READ) ACTION(AUDIT) TSS PERMIT(syspsmpl) IBMFAC(STGADMIN.IGG.DEFDEL.UALIAS) - ACCESS(READ) ACTION(AUDIT) The following resources and prefixes may be available to the end user. Example: STGADMIN.ADR.COPY.CNCURRNT STGADMIN.ADR.COPY.FLASHCPY STGADMIN.ADR.COPY.TOLERATE.ENQF STGADMIN.ADR.DUMP.CNCURRNT STGADMIN.ADR.DUMP.TOLERATE.ENQF STGADMIN.ADR.RESTORE.TOLERATE.ENQF STGADMIN.ARC.ENDUSER. STGADMIN.IGG.ALTER.SMS Example: TSS PERMIT(endusers) IBMFAC(STGADMIN.ADR.COPY.CNCURRNT.) - ACCESS(READ) The following resource is restricted to Application Production Support Team members, Automated Operations, DASD managers, and system programmers. STGADMIN.IDC.DCOLLECT Example: TSS PERMIT(appssmpl) IBMFAC(STGADMIN.IDC.DCOLLECT) ACCESS(READ) TSS PERMIT(autosmpl) IBMFAC(STGADMIN.IDC.DCOLLECT) ACCESS(READ) TSS PERMIT(dasbsmpl) IBMFAC(STGADMIN.IDC.DCOLLECT) ACCESS(READ) TSS PERMIT(dasdsmpl) IBMFAC(STGADMIN.IDC.DCOLLECT) ACCESS(READ) TSS PERMIT(syspsmpl) IBMFAC(STGADMIN.IDC.DCOLLECT) ACCESS(READ) The following resources are restricted to Application Production Support Team members, DASD managers, and system programmers. Example: STGADMIN.ARC.CANCEL STGADMIN.ARC.LIST STGADMIN.ARC.QUERY STGADMIN.ARC.REPORT STGADMIN.DMO.CONFIG STGADMIN.IFG.READVTOC STGADMIN.IGG.DELGDG.FORCE Example: TSS PERMIT(appssmpl) IBMFAC(STGADMIN.ARC.CANCEL) ACCESS(READ) TSS PERMIT(dasbsmpl) IBMFAC(STGADMIN.ARC.CANCEL) ACCESS(READ) TSS PERMIT(dasdsmpl) IBMFAC(STGADMIN.ARC.CANCEL) ACCESS(READ) TSS PERMIT(syspsmpl) IBMFAC(STGADMIN.ARC.CANCEL) ACCESS(READ) The following resource prefixes, at a minimum, are restricted to DASD managers and system programmers. STGADMIN.ADR STGADMIN.ANT STGADMIN.ARC STGADMIN.DMO STGADMIN.ICK STGADMIN.IDC STGADMIN.IFG STGADMIN.IGG STGADMIN.IGWSHCDS Example: TSS PERMIT(dasbsmpl) IBMFAC(STGADMIN.ADR) ACCESS(READ) TSS PERMIT(dasdsmpl) IBMFAC(STGADMIN.ADR) ACCESS(READ) TSS PERMIT(syspsmpl) IBMFAC(STGADMIN.ADR) ACCESS(READ) The following Storage Administrator functions prefix is restricted to DASD managers and system programmers and all access is logged. STGADMIN.ADR.STGADMIN. Example: TSS PERMIT(dasbsmpl) IBMFAC(STGADMIN.ADR.STGADMIN.) ACCESS(READ) - ACTION(AUDIT) TSS PERMIT(dasdsmpl) IBMFAC(STGADMIN.ADR.STGADMIN.) ACCESS(READ) - ACTION(AUDIT) TSS PERMIT(syspsmpl) IBMFAC(STGADMIN.ADR.STGADMIN.) ACCESS(READ) - ACTION(AUDIT)

b
IBM z/OS DFSMS Program Resources must be properly defined and protected.
AC-3 - Medium - CCI-000213 - V-224050 - SV-224050r877888_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-SM-000020
Vuln IDs
  • V-224050
  • V-98807
Rule IDs
  • SV-224050r877888_rule
  • SV-107911
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.
Checks: C-25723r869005_chk

Refer to the load modules residing in the following Load libraries to determine program resource definitions: v SYS1.DGTLLIB for DFSMSdfp/ISMF v SYS1.DGTLLIB for DFSMSdss/ISMF v SYS1.DFQLLIB for DFSMShsm If the installation moves these modules to another load library the installation-defined load library must be used in the program protection. If the TSS resources are owned or DEFPROT is specified for the resource class, this is not a finding. If the TSS resource access authorizations restrict access to the appropriate personnel, this is not a finding.

Fix: F-25711r869006_fix

Configure the following to be 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. Reference the SMS Program Resources as provided by the following libraries: v SYS1.DGTLLIB for DFSMSdfp/ISMF v SYS1.DGTLLIB for DFSMSdss/ISMF v SYS1.DFQLLIB for DFSMShsm If the installation moves these modules to another load library the installation-defined load library must be used in the program protection. The TSS resources as designated in the above are owned and/or DEFPROT is specified for the resource class. The TSS resource access authorizations restrict access to the appropriate personnel as designated in the above. The following commands are provided as a sample for implementing resource controls: Example: TSS ADD(dept-acid) PROGRAM(ACBFUTO2) TSS PERMIT(smplsmpl) PROGRAM(ACBFUTO2) TSS PERMIT(dasdsmpl) PROGRAM(ACBFUTO2) TSS PERMIT(secasmpl) PROGRAM(ACBFUTO2) TSS PERMIT(syspsmpl) PROGRAM(ACBFUTO2) TSS PERMIT(tstcsmpl) PROGRAM(ACBFUTO2)

b
IBM z/OS DFSMS control data sets must be protected in accordance with security requirements.
AC-3 - Medium - CCI-000213 - V-224051 - SV-224051r877889_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
TSS0-SM-000030
Vuln IDs
  • V-224051
  • V-98809
Rule IDs
  • SV-224051r877889_rule
  • SV-107913
To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.
Checks: C-25724r516552_chk

Refer to the logical parmlib data sets, example: SYS1.PARMLIB(IGDSMSxx), to identify the fully qualified file names for the following SMS data sets: Source Control Data Set (SCDS) Active Control Data Set (ACDS) Communications Data Set (COMMDS) Automatic Class Selection Routine Source Data Sets (ACS) ACDS Backup COMMDS Backup If the TSS data set rules for the SCDS, ACDS, COMMDS, and ACS data sets restrict UPDATE and ALL access to only systems programming personnel, this is not a finding. If the TSS data set rules for the SCDS, ACDS, COMMDS, and ACS data sets do not restrict UPDATE and ALL access to only systems programming personnel, this is a finding. Note: At the discretion of the ISSM, DASD administrators are allowed UPDATE access to the control data sets.

Fix: F-25712r516553_fix

Review the logical parmlib data sets, example: SYS1.PARMLIB(IGDSMSxx), to identify the fully qualified file names for the following SMS data sets: Source Control Data Set (SCDS) Active Control Data Set (ACDS) Communications Data Set (COMMDS) Automatic Class Selection Routine Source Data Sets (ACS) ACDS Backup COMM