IBM z/OS ACF2 Security Technical Implementation Guide

Description

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].

Details

Version / Release: V8R11

Published: 2023-03-20

Updated At: 2023-05-04 00:34:40

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Rule	Version	CCI	Severity	Title	Description
SV-223419r533198_rule	ACF2-CE-000010	CCI-000764	MEDIUM	IBM z/OS Certificate Name Filtering must be implemented with appropriate authorization and documentation.	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 orga
SV-223420r533198_rule	ACF2-CE-000020	CCI-000185	MEDIUM	IBM z/OS must not use Expired Digital Certificates.	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
SV-223421r868781_rule	ACF2-CE-000030	CCI-000185	MEDIUM	All IBM z/OS digital certificates in use must have a valid path to a trusted Certification authority.	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
SV-223422r533198_rule	ACF2-ES-000010	CCI-000015	HIGH	CA-ACF2 OPTS GSO record must be set to ABORT mode.	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 t
SV-223423r533198_rule	ACF2-ES-000020	CCI-000213	MEDIUM	The number of ACF2 users granted the special privilege PPGM must be justified.	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
SV-223424r904401_rule	ACF2-ES-000030	CCI-000213	LOW	The number of ACF2 users granted the special privilege OPERATOR must be kept to a strictly controlled minimum.	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
SV-223425r904402_rule	ACF2-ES-000040	CCI-000213	LOW	The number of ACF2 users granted the special privilege CONSOLE must be justified.	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
SV-223426r533198_rule	ACF2-ES-000050	CCI-000213	MEDIUM	The number of ACF2 users granted the special privilege ALLCMDS must be justified.	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
SV-223427r533198_rule	ACF2-ES-000060	CCI-000213	MEDIUM	IBM z/OS system commands must be properly protected.	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
SV-223428r533198_rule	ACF2-ES-000070	CCI-000213	MEDIUM	IBM z/OS Sensitive Utility Controls must be properly defined and protected.	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
SV-223429r533198_rule	ACF2-ES-000080	CCI-000213	MEDIUM	CA-ACF2 NJE GSO record value must indicate validation options that apply to jobs submitted through a network job entry subsystem (JES2, JES3, RSCS).	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
SV-223430r868783_rule	ACF2-ES-000090	CCI-000213	MEDIUM	CA-ACF2 must protect Memory and privileged program dumps in accordance with proper security requirements.	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
SV-223431r533198_rule	ACF2-ES-000100	CCI-000213	MEDIUM	CA-ACF2 must properly define users that have access to the CONSOLE resource in the TSOAUTH resource class.	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
SV-223433r533198_rule	ACF2-ES-000120	CCI-000213	MEDIUM	CA-ACF2 must limit access to SYSTEM DUMP data sets to appropriate authorized users.	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 empl
SV-223434r853499_rule	ACF2-ES-000130	CCI-000213	MEDIUM	CA-ACF2 must limit access to SYS(x).TRACE to system programmers only.	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
SV-223435r861163_rule	ACF2-ES-000140	CCI-000213	MEDIUM	CA-ACF2 allocate access to system user catalogs must be properly protected.	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 empl
SV-223436r836693_rule	ACF2-ES-000150	CCI-000213	MEDIUM	ACF2 Classes required to properly security the z/OS UNIX environment must be ACTIVE.	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
SV-223437r533198_rule	ACF2-ES-000160	CCI-000213	MEDIUM	Access to IBM z/OS special privilege TAPE-LBL or TAPE-BLP must be limited and/or justified.	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
SV-223438r533198_rule	ACF2-ES-000170	CCI-000213	MEDIUM	CA-ACF2 must limit access to System page data sets (i.e., PLPA, COMMON, and LOCALx) to system programmers.	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
SV-223439r861164_rule	ACF2-ES-000180	CCI-000213	HIGH	IBM z/OS must protect dynamic lists in accordance with proper security requirements.	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
SV-223440r853504_rule	ACF2-ES-000190	CCI-000213	HIGH	IBM z/OS Libraries included in the system REXXLIB concatenation must be properly protected.	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
SV-223441r853505_rule	ACF2-ES-000200	CCI-000213	HIGH	CA-ACF2 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.	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
SV-223442r861165_rule	ACF2-ES-000210	CCI-000213	HIGH	CA-ACF2 must limit all system PROCLIB data sets to appropriate authorized users.	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
SV-223443r836648_rule	ACF2-ES-000220	CCI-000213	HIGH	CA-ACF2 access to the System Master Catalog must be properly protected.	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
SV-223444r853509_rule	ACF2-ES-000230	CCI-000213	MEDIUM	IBM z/OS MCS consoles access authorization(s) for CONSOLE resource(s) must be properly protected.	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
SV-223445r853510_rule	ACF2-ES-000240	CCI-000213	HIGH	CA-ACF2 must limit Write or greater access to SYS1.NUCLEUS to system programmers only.	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
SV-223446r853511_rule	ACF2-ES-000250	CCI-000213	HIGH	CA-ACF2 must limit Write or greater access to SYS1.LPALIB to system programmers only.	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
SV-223447r853512_rule	ACF2-ES-000260	CCI-000213	HIGH	CA-ACF2 must limit Write or greater access to SYS1.IMAGELIB to system programmers.	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
SV-223448r861166_rule	ACF2-ES-000270	CCI-000213	HIGH	CA-ACF2 must limit Write or greater access to Libraries containing EXIT modules to system programmers only.	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 empl
SV-223449r853514_rule	ACF2-ES-000280	CCI-000213	HIGH	CA-ACF2 must limit Update and Allocate access to all APF-authorized libraries to system programmers only.	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
SV-223450r853515_rule	ACF2-ES-000290	CCI-000213	HIGH	CA-ACF2 must limit Write or greater access to all LPA libraries to system programmers only.	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
SV-223451r853516_rule	ACF2-ES-000300	CCI-000213	MEDIUM	CA-ACF2 must limit Update and Allocate access to LINKLIST libraries to system programmers only.	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
SV-223452r853517_rule	ACF2-ES-000310	CCI-000213	MEDIUM	CA-ACF2 must limit update and allocate access to all system-level product installation libraries to system programmers only.	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
SV-223453r853518_rule	ACF2-ES-000320	CCI-000213	HIGH	CA-ACF2 must limit Write or greater access to SYS1.SVCLIB to system programmers only.	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
SV-223454r853519_rule	ACF2-ES-000330	CCI-000213	MEDIUM	CA-ACF2 Access to SYS1.LINKLIB must be properly protected.	If the operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement a
SV-223455r861167_rule	ACF2-ES-000340	CCI-000213	MEDIUM	CA-ACF2 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.	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
SV-223456r877392_rule	ACF2-ES-000350	CCI-002235	HIGH	CA-ACF2 LOGONIDs must not be defined to SYS1.UADS for non-emergency use.	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,
SV-223457r877392_rule	ACF2-ES-000370	CCI-002235	MEDIUM	IBM z/OS IEASYMUP resource must be protected in accordance with proper security requirements.	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. Circumvent
SV-223458r877392_rule	ACF2-ES-000380	CCI-002235	MEDIUM	CA-ACF2 must limit Update and Allocate access to system backup files to system programmers and/or batch jobs that perform DASD backups.	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,
SV-223459r877392_rule	ACF2-ES-000390	CCI-002235	MEDIUM	ACF2 PPGM GSO record value must specify protected programs that are only executed by privileged users.	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,
SV-223462r853526_rule	ACF2-ES-000430	CCI-002238	MEDIUM	The CA-ACF2 PSWD GSO record values for MAXTRY and PASSLMT must be properly set.	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.
SV-223463r853527_rule	ACF2-ES-000440	CCI-000171	HIGH	IBM z/OS SYS1.PARMLIB must be properly protected.	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
SV-223464r853528_rule	ACF2-ES-000450	CCI-001813	HIGH	CA-ACF2 must be installed, functional, and properly configured.	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
SV-223465r853529_rule	ACF2-ES-000470	CCI-000213	MEDIUM	CA-ACF2 must limit update and allocate access to the JES2 System data sets (e.g., Spool, Checkpoint, and Initialization parameters) to system programmers only.	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
SV-223466r853530_rule	ACF2-ES-000480	CCI-000213	LOW	CA-ACF2 must limit Write or greater access to libraries that contain PPT modules to system programmers only.	If the operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement a
SV-223467r533198_rule	ACF2-ES-000490	CCI-000366	MEDIUM	The EXITS GSO record value must specify the module names of site written ACF2 exit routines.	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 secur
SV-223468r533198_rule	ACF2-ES-000500	CCI-000366	MEDIUM	The CA-ACF2 LOGONID with the REFRESH attribute must have procedures for utilization.	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 secur
SV-223469r533198_rule	ACF2-ES-000510	CCI-000366	MEDIUM	IBM z/OS TSO GSO record values must be set to the values specified.	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 secur
SV-223470r533198_rule	ACF2-ES-000520	CCI-000366	MEDIUM	IBM z/OS procedures must restrict ACF2 LOGONIDs with the READALL attribute to auditors and/or authorized users.	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 mul
SV-223471r533198_rule	ACF2-ES-000530	CCI-000366	MEDIUM	IBM z/OS must have the RULEVLD and RSRCVLD attributes specified for LOGONIDs with the SECURITY attribute.	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 mul
SV-223472r533198_rule	ACF2-ES-000540	CCI-000366	MEDIUM	IBM z/OS LOGONIDs with the AUDIT or CONSULT attribute must be properly scoped.	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 mul
SV-223473r533198_rule	ACF2-ES-000550	CCI-000366	MEDIUM	IBM z/OS LOGONID with the ACCTPRIV attribute must be restricted to the ISSO.	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 mul
SV-223474r533198_rule	ACF2-ES-000560	CCI-000366	MEDIUM	IBM z/OS batch jobs with restricted ACF2 LOGONIDs must have the PGM(xxxxxxxx) and SUBAUTH attributes or the SOURCE(xxxxxxxx) attribute assigned to the corresponding LOGONIDs.	Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours can indicate hostile activity if it occurs during off hours. Depending on mission needs and conditions, account usage restrictions
SV-223475r695416_rule	ACF2-ES-000570	CCI-000366	MEDIUM	CA-ACF2 RULEOPTS GSO record values must be set to the values specified.	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 secur
SV-223476r695413_rule	ACF2-ES-000580	CCI-000366	MEDIUM	The CA-ACF2 GSO OPTS record value must be properly specified.	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 secur
SV-223477r533198_rule	ACF2-ES-000590	CCI-000366	MEDIUM	CA-ACF2 must prevent the use of dictionary words for passwords.	If the operating system allows the user to select passwords based on dictionary words, then this increases the chances of password compromise by increasing the opportunity for successful guesses and brute-force attacks.
SV-223478r533198_rule	ACF2-ES-000600	CCI-000366	MEDIUM	CA-ACF2 database must be on a separate physical volume from its backup and recovery data sets.	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 secur
SV-223479r533198_rule	ACF2-ES-000610	CCI-000366	MEDIUM	CA-ACF2 database must be backed up on a scheduled basis.	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 secur
SV-223480r533198_rule	ACF2-ES-000620	CCI-000366	MEDIUM	ACF2 REFRESH attribute must be restricted to security administrators only.	Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours can indicate hostile activity if it occurs during off hours. Depending on mission needs and conditions, account usage restrictions
SV-223481r695419_rule	ACF2-ES-000630	CCI-000366	MEDIUM	ACF2 maintenance LOGONIDs must have corresponding GSO MAINT records.	Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours can indicate hostile activity if it occurs during off hours. Depending on mission needs and conditions, account usage restrictions
SV-223482r533198_rule	ACF2-ES-000640	CCI-000366	MEDIUM	ACF2 LOGONIDs with the NON-CNCL attribute specified in the associated LOGONID record must be listed as trusted and must be specifically approved.	Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours can indicate hostile activity if it occurs during off hours. Depending on mission needs and conditions, account usage restrictions
SV-223483r533198_rule	ACF2-ES-000650	CCI-000366	MEDIUM	ACF2 LOGONIDs with the ACCOUNT, LEADER, or SECURITY attribute must be properly scoped.	Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours can indicate hostile activity if it occurs during off hours. Depending on mission needs and conditions, account usage restrictions
SV-223484r836695_rule	ACF2-ES-000660	CCI-000366	MEDIUM	ACF2 LOGONIDs associated with started tasks that have the MUSASS attribute and the requirement to submit jobs on behalf of its users must have the JOBFROM attribute as required.	Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours can indicate hostile activity if it occurs during off hours. Depending on mission needs and conditions, account usage restrictions
SV-223485r877342_rule	ACF2-ES-000670	CCI-000764	MEDIUM	IBM z/OS Started Tasks must be properly identified and defined to ACF2.	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 assoc
SV-223486r533198_rule	ACF2-ES-000680	CCI-000366	MEDIUM	ACF2 emergency LOGONIDS with the REFRESH attribute must have the SUSPEND attribute specified.	Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours can indicate hostile activity if it occurs during off hours. Depending on mission needs and conditions, account usage restrictions
SV-223487r533198_rule	ACF2-ES-000690	CCI-000537	MEDIUM	ACF2 BACKUP GSO record must be defined with a TIME value specifies greater than 00 unless the database is shared and backed up on another system.	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 secur
SV-223488r533198_rule	ACF2-ES-000700	CCI-000368	LOW	ACF2 APPLDEF GSO record if used must have supporting documentation indicating the reason it was used.	Failure to restrict network connectivity only to authorized systems permits inbound connections from malicious systems. It also permits outbound connections that may facilitate exfiltration of DoD data.
SV-223489r853531_rule	ACF2-ES-000710	CCI-001764	MEDIUM	ACF2 MAINT GSO record value if specified must be restricted to production storage management user.	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 i
SV-223490r853532_rule	ACF2-ES-000720	CCI-001764	MEDIUM	ACF2 LINKLST GSO record if specified must only contains trusted system data sets.	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 i
SV-223491r533198_rule	ACF2-ES-000730	CCI-000382	MEDIUM	IBM z/OS must properly protect MCS console userid(s).	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 po
SV-223492r533198_rule	ACF2-ES-000740	CCI-000382	MEDIUM	ACF2 BLPPGM GSO record must not be defined.	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 po
SV-223493r695420_rule	ACF2-ES-000750	CCI-000764	HIGH	IBM z/OS UID(0) must be properly assigned.	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 orga
SV-223494r836650_rule	ACF2-ES-000760	CCI-000764	MEDIUM	IBM z/OS user account for the UNIX kernel (OMVS) must be properly defined to the security database.	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 orga
SV-223495r861168_rule	ACF2-ES-000770	CCI-000764	MEDIUM	IBM z/OS user account for the UNIX (RMFGAT) must be properly defined.	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 orga
SV-223496r533198_rule	ACF2-ES-000780	CCI-000764	MEDIUM	ACF2 LOGONIDs must be defined with the required fields completed.	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 orga
SV-223497r533198_rule	ACF2-ES-000790	CCI-000764	MEDIUM	CA-ACF2 defined user accounts must uniquely identify system users.	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 orga
SV-223498r533198_rule	ACF2-ES-000800	CCI-000795	MEDIUM	CA-ACF2 userids found inactive for more than 35 days must be suspended.	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 acco
SV-223499r695422_rule	ACF2-ES-000810	CCI-001619	MEDIUM	CA-ACF2 PWPHRASE GSO record must be properly defined.	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 co
SV-223500r695424_rule	ACF2-ES-000820	CCI-001619	MEDIUM	CA-ACF2 must enforce password complexity by requiring that at least one special character be used.	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 co
SV-223501r695426_rule	ACF2-ES-000840	CCI-000192	MEDIUM	ACF2 PSWD GSO record value must be set to require at least one upper-case character be used.	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.
SV-223502r695429_rule	ACF2-ES-000850	CCI-000194	MEDIUM	ACF2 PSWD GSO record value must be set to require at least one numeric character be used.	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
SV-223503r861169_rule	ACF2-ES-000860	CCI-000193	MEDIUM	ACF2 PSWD GSO record value must be set to require at least one lower-case character be used.	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
SV-223504r695433_rule	ACF2-ES-000870	CCI-000195	MEDIUM	ACF2 PSWD GSO record value must be set to require the change of at least 50% of the total number of characters when passwords are changed.	If the operating system allows the user to consecutively reuse extensive portions of passwords, this increases the chances of password compromise by increasing the window of opportunity for attempts at guessing and brute-force attacks. The number of chan
SV-223505r877397_rule	ACF2-ES-000880	CCI-000196	HIGH	ACF2 must use NIST FIPS-validated cryptography to protect passwords in the security database.	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-0
SV-223506r695437_rule	ACF2-ES-000890	CCI-000199	MEDIUM	ACF2 PSWD GSO record value must be set to require a 60-day maximum password lifetime restriction.	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 op
SV-223507r695439_rule	ACF2-ES-000900	CCI-000198	MEDIUM	ACF2 PSWD GSO record value must be set to require 24 hours/1 day as the minimum password lifetime.	Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, then the password could be repeate
SV-223508r695441_rule	ACF2-ES-000910	CCI-000200	MEDIUM	ACF2 PSWD GSO record value must be set to prohibit password reuse for a minimum of five generations or more.	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
SV-223509r695443_rule	ACF2-ES-000920	CCI-000206	MEDIUM	ACF2 TSOTWX GSO record values must be set to obliterate the logon password on TWX devices.	To prevent the compromise of authentication information, such as passwords during the authentication process, the feedback from the operating system must not provide any information allowing an unauthorized user to compromise the authentication mechanism.
SV-223510r533198_rule	ACF2-ES-000930	CCI-000206	MEDIUM	ACF2 TSOCRT GSO record values must be set to obliterate the logon to ASCII CRT devices.	To prevent the compromise of authentication information, such as passwords during the authentication process, the feedback from the operating system must not provide any information allowing an unauthorized user to compromise the authentication mechanism.
SV-223511r695445_rule	ACF2-ES-000940	CCI-000206	MEDIUM	ACF2 TSO2741 GSO record values must be set to obliterate the logon password on 2741 devices.	To prevent the compromise of authentication information, such as passwords during the authentication process, the feedback from the operating system must not provide any information allowing an unauthorized user to compromise the authentication mechanism.
SV-223512r695447_rule	ACF2-ES-000950	CCI-000368	MEDIUM	ACF2 SECVOLS GSO record value must be set to VOLMASK(). Any local changes are justified and documented with the ISSO.	The SECVOLS record defines the DASD and tape volumes for which CA-ACF2 provides volume-level protection. Information at rest refers to the state of information when it is located on a secondary storage device (e.g., disk drive and tape drive, when used fo
SV-223513r864502_rule	ACF2-ES-000960	CCI-000368	MEDIUM	ACF2 RESVOLS GSO record value must be set to Volmask(-). Any other setting requires documentation justifying the change.	The RESVOLS record defines DASD and mass storage volumes for which CA ACF2 is to provide protection at the data set name level. Information at rest refers to the state of information when it is located on a secondary storage device (e.g., disk drive and t
SV-223514r853533_rule	ACF2-ES-000970	CCI-000213	HIGH	ACF2 security data sets and/or databases must be properly protected.	An isolation boundary provides access control and protects the integrity of the hardware, software, and firmware that perform security functions. Security functions are the hardware, software, and/or firmware of the information system responsible for enf
SV-223515r533198_rule	ACF2-ES-000980	CCI-001090	MEDIUM	ACF2 AUTOERAS GSO record value must be set to indicate that ACF2 is controlling the automatic physical erasure of VSAM or non VSAM data sets.	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 bein
SV-223517r861171_rule	ACF2-FT-000010	CCI-000067	MEDIUM	IBM z/OS SMF recording options for the FTP Server must be configured to write SMF records for all eligible events.	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
SV-223518r533198_rule	ACF2-FT-000020	CCI-000213	MEDIUM	IBM z/OS data sets for the FTP Server must be properly protected.	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
SV-223519r533198_rule	ACF2-FT-000030	CCI-000213	MEDIUM	IBM z/OS permission bits and user audit bits for HFS objects that are part of the FTP Server component must be properly configured.	MVS data sets of the FTP Server provide the configuration and operational characteristics of this product. Failure to properly secure these data sets may lead to unauthorized access resulting in the compromise of the integrity and availability of customer
SV-223520r864503_rule	ACF2-FT-000040	CCI-000048	MEDIUM	IBM z/OS FTP.DATA configuration statements must have a proper BANNER statement with the Standard Mandatory DoD Notice and Consent Banner.	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,
SV-223522r533198_rule	ACF2-FT-000060	CCI-001384	MEDIUM	IBM z/OS FTP.DATA configuration statements for the FTP Server must specify the BANNER statement.	The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operationa
SV-223523r533198_rule	ACF2-FT-000070	CCI-000366	MEDIUM	IBM z/OS FTP Control cards must be properly stored in a secure PDS file.	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 secur
SV-223524r853535_rule	ACF2-FT-000080	CCI-001764	MEDIUM	The IBM z/OS TFTP Server program must be properly protected.	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 i
SV-223525r861172_rule	ACF2-FT-000090	CCI-000764	MEDIUM	IBM z/OS FTP Server daemon must be defined with proper security parameters.	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 orga
SV-223526r861173_rule	ACF2-FT-000100	CCI-001133	MEDIUM	IBM z/OS startup parameters for the FTP Server must be defined in the SYSTCPD and SYSFTPD DD statements for configuration files.	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 terminat
SV-223527r533198_rule	ACF2-FT-000110	CCI-001133	MEDIUM	IBM z/OS FTP.DATA configuration for the FTP Server must have INACTIVE statement properly set.	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 terminat
SV-223528r533198_rule	ACF2-JS-000010	CCI-000213	MEDIUM	IBM z/OS JESTRACE and/or SYSLOG resources must be protected in accordance with security requirements.	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
SV-223529r533198_rule	ACF2-JS-000020	CCI-000213	MEDIUM	IBM z/OS JESSPOOL resources must be protected in accordance with security requirements.	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
SV-223530r533198_rule	ACF2-JS-000030	CCI-000213	MEDIUM	IBM z/OS JESNEWS resources must be protected in accordance with security requirements.	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
SV-223531r533198_rule	ACF2-JS-000040	CCI-000213	MEDIUM	IBM z/OS JES2 system commands must be protected in accordance with security requirements.	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
SV-223532r861174_rule	ACF2-JS-000050	CCI-000213	MEDIUM	IBM z/OS JES2 spool resources must be controlled in accordance with security requirements.	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
SV-223533r861175_rule	ACF2-JS-000060	CCI-000213	MEDIUM	IBM z/OS JES2 output devices must be properly controlled for Classified Systems.	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
SV-223534r533198_rule	ACF2-JS-000070	CCI-000213	MEDIUM	IBM z/OS JES2 output devices must be controlled in accordance with the proper security requirements.	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
SV-223535r767056_rule	ACF2-JS-000080	CCI-000213	MEDIUM	IBM z/OS JES2 input sources must be controlled in accordance with the proper security requirements.	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
SV-223536r853536_rule	ACF2-JS-000090	CCI-000213	MEDIUM	IBM z/OS Surrogate users must be controlled in accordance with proper security requirements.	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
SV-223537r836653_rule	ACF2-OS-000010	CCI-000067	MEDIUM	The IBM z/OS BPX.SMF resource must be properly configured.	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
SV-223539r836655_rule	ACF2-OS-000030	CCI-000381	MEDIUM	IBM z/OS Inapplicable PPT entries must be invalidated.	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 ri
SV-223540r533198_rule	ACF2-OS-000040	CCI-001686	MEDIUM	IBM z/OS system administrator must develop a process notify appropriate personnel when accounts are removed.	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 ev
SV-223541r533198_rule	ACF2-OS-000050	CCI-001684	MEDIUM	IBM z/OS system administrator must develop a process notify appropriate personnel when accounts are modified.	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 modify an existing account. Notification of account modification is one
SV-223542r533198_rule	ACF2-OS-000060	CCI-001685	MEDIUM	IBM z/OS system administrator must develop a process notify appropriate personnel when accounts are deleted.	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 ev
SV-223543r533198_rule	ACF2-OS-000070	CCI-001683	MEDIUM	IBM z/OS system administrator must develop a process notify appropriate personnel when accounts are created.	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
SV-223544r869034_rule	ACF2-OS-000080	CCI-000018	MEDIUM	IBM z/OS Required SMF data record types must be collected.	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
SV-223545r533198_rule	ACF2-OS-000090	CCI-000213	MEDIUM	IBM z/OS special privileges must be assigned on an as-needed basis to LOGONIDs associated with STCs and LOGONIDs that need to execute TSO in batch.	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
SV-223546r533198_rule	ACF2-OS-000100	CCI-000135	MEDIUM	IBM z/OS must specify SMF data options to assure appropriate activation.	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
SV-223547r877391_rule	ACF2-OS-000110	CCI-001849	MEDIUM	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.	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 perform
SV-223548r877390_rule	ACF2-OS-000120	CCI-001851	MEDIUM	IBM z/OS system administrators must develop an automated process to collect and retain SMF data.	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.
SV-223549r853542_rule	ACF2-OS-000130	CCI-000139	MEDIUM	IBM z/OS BUFUSEWARN in the SMFPRMxx must be properly set.	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 oper
SV-223550r533198_rule	ACF2-OS-000140	CCI-000140	MEDIUM	IBM z/OS NOBUFFS in SMFPRMxx must be properly set (Default is MSG).	It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include: software/hardware errors; failures in the audit capturing mechanisms; and au
SV-223551r877038_rule	ACF2-OS-000150	CCI-001891	MEDIUM	IBM z/OS SNTP daemon (SNTPD) permission bits must be properly configured.	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.
SV-223552r877038_rule	ACF2-OS-000160	CCI-001891	MEDIUM	IBM z/OS SNTP daemon (SNTPD) must be active.	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.
SV-223553r853545_rule	ACF2-OS-000170	CCI-002046	MEDIUM	IBM z/OS PARMLIB CLOCKxx must have the Accuracy PARM coded properly.	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.
SV-223554r853546_rule	ACF2-OS-000180	CCI-000162	MEDIUM	IBM z/OS SMF collection files (i.e., SYS1.MANx) access must be limited to appropriate users and/or batch jobs that perform SMF dump processing.	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 r
SV-223555r533198_rule	ACF2-OS-000190	CCI-000366	MEDIUM	IBM z/OS system administrator must develop a process to notify ISSOs of account enabling actions.	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 ena
SV-223556r533198_rule	ACF2-OS-000200	CCI-000366	MEDIUM	IBM z/OS PASSWORD data set and OS passwords must not be used.	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 secur
SV-223557r836661_rule	ACF2-OS-000210	CCI-000366	MEDIUM	IBM z/OS must configure system waittimes to protect resource availability based on site priorities.	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 ena
SV-223558r803626_rule	ACF2-OS-000220	CCI-000366	MEDIUM	IBM z/OS Emergency LOGONIDs must be properly defined.	Activity under unusual conditions can indicate hostile activity. For example, what is normal activity during business hours can indicate hostile activity if it occurs during off hours. Depending on mission needs and conditions, account usage restrictions
SV-223559r533198_rule	ACF2-OS-000230	CCI-000366	MEDIUM	IBM z/OS DFSMS control data sets must reside on separate storage volumes.	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 impactin
SV-223560r853547_rule	ACF2-OS-000240	CCI-000366	MEDIUM	IBM z/OS Policy Agent must employ a deny-all, allow-by-exception firewall policy for allowing connections to other systems.	Failure to restrict network connectivity only to authorized systems permits inbound connections from malicious systems. It also permits outbound connections that may facilitate exfiltration of DoD data.
SV-223561r861180_rule	ACF2-OS-000250	CCI-001764	HIGH	Unsupported IBM z/OS system software must not be installed and/or active on the system.	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 i
SV-223562r853549_rule	ACF2-OS-000260	CCI-001764	MEDIUM	IBM z/OS must not allow non-existent or inaccessible LINKLIST libraries.	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 i
SV-223563r853550_rule	ACF2-OS-000270	CCI-001764	MEDIUM	IBM z/OS must not allow non-existent or inaccessible Link Pack Area (LPA) libraries.	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 i
SV-223564r533198_rule	ACF2-OS-000280	CCI-000381	MEDIUM	IBM z/OS must not have inaccessible APF libraries defined.	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 ri
SV-223565r533198_rule	ACF2-OS-000290	CCI-000381	MEDIUM	IBM z/OS LNKAUTH=APFTAB must be specified in the IEASYSxx member(s) in the currently active parmlib data set(s).	Failure to specify LINKAUTH=APFTAB allows libraries other than those designated as APF to contain authorized modules which could bypass security and violate the integrity of the operating system environment. This expanded authorization list inhibits the a
SV-223566r533198_rule	ACF2-OS-000310	CCI-000381	MEDIUM	Duplicated IBM z/OS sensitive utilities and/or programs must not exist in APF libraries.	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. The organization must perform a periodic
SV-223567r533198_rule	ACF2-OS-000320	CCI-000382	MEDIUM	IBM z/OS must properly configure CONSOLxx members.	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 po
SV-223568r811030_rule	ACF2-OS-000330	CCI-000186	MEDIUM	IBM z/OS must use ICSF or SAF Key Rings for key management.	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 privat
SV-223569r853551_rule	ACF2-OS-000340	CCI-001199	MEDIUM	The IBM z/OS systems requiring data at rest protection must properly employ IBM DS8880 or equivalent hardware solutions for full disk encryption.	Information at rest refers to the state of information when it is located on a secondary storage device (e.g., disk drive and tape drive, when used for backups) within an operating system. This control addresses the confidentiality and integrity of infor
SV-223570r533198_rule	ACF2-OS-000350	CCI-001090	MEDIUM	IBM z/OS sensitive and critical system data sets must not exist on shared DASD.	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 bein
SV-223571r853552_rule	ACF2-OS-000360	CCI-002385	MEDIUM	IBM z/OS Policy agent must contain a 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.	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 t
SV-223572r533198_rule	ACF2-OS-000370	CCI-001095	MEDIUM	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.	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.
SV-223573r533198_rule	ACF2-OS-002240	CCI-000056	MEDIUM	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.	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 a
SV-223574r853553_rule	ACF2-OS-002330	CCI-001744	MEDIUM	IBM z/OS system administrator must develop a procedure to notify designated personnel if baseline configurations are changed in an unauthorized manner.	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
SV-223575r533198_rule	ACF2-OS-002350	CCI-000060	MEDIUM	IBM z/OS must employ a session manager that conceal, via the session lock, information previously visible on the display with a publicly viewable image.	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 po
SV-223576r533198_rule	ACF2-OS-002360	CCI-000057	MEDIUM	IBM z/OS must employ a session manager to manage session lock after a 15-minute period of inactivity.	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 a
SV-223577r533198_rule	ACF2-OS-002370	CCI-000016	MEDIUM	IBM z/OS System Administrator must develop a procedure to automatically remove or disable temporary user accounts after 72 hours.	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. T
SV-223578r533198_rule	ACF2-OS-002380	CCI-001682	MEDIUM	IBM z/OS system administrator must develop a procedure to automatically remove or disable emergency accounts after the crisis is resolved or 72 hours.	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 a
SV-223579r853554_rule	ACF2-OS-002390	CCI-002132	MEDIUM	IBM z/OS system administrator must develop a procedure to notify system administrators and ISSOs of account enabling actions.	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 ena
SV-223580r533198_rule	ACF2-OS-002410	CCI-000879	MEDIUM	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.	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 syst
SV-223581r853555_rule	ACF2-OS-002420	CCI-002617	MEDIUM	IBM z/OS system administrator must develop a procedure to remove all software components after updated versions have been installed.	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
SV-223582r853556_rule	ACF2-OS-002430	CCI-002702	MEDIUM	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.	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
SV-223583r533198_rule	ACF2-OS-002440	CCI-000058	MEDIUM	IBM z/OS must employ a session manager configured for users to directly initiate a session lock for all connection types.	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 a
SV-223584r533198_rule	ACF2-OS-002470	CCI-000795	MEDIUM	ACF2 system administrator must develop a procedure to disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.	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 acco
SV-223585r853557_rule	ACF2-OS-003430	CCI-001851	MEDIUM	IBM z/OS system administrator must develop a procedure to offload SMF files to a different system or media than the system being audited.	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.
SV-223586r853558_rule	ACF2-SH-000010	CCI-000067	MEDIUM	IBM z/OS SMF recording options for the SSH daemon must be configured to write SMF records for all eligible events.	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
SV-223587r533198_rule	ACF2-SH-000030	CCI-000048	MEDIUM	IBM z/OS SSH daemon must be configured with the Department of Defense (DoD) logon banner.	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, po
SV-223588r533198_rule	ACF2-SH-000040	CCI-000382	HIGH	IBM z/OS SSH daemon must be configured to only use the SSHv2 protocol.	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 po
SV-223589r877398_rule	ACF2-SH-000050	CCI-000068	HIGH	IBM z/OS SSH daemon must be configured to use a FIPS 140-2 compliant cryptographic algorithm.	Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) co
SV-223590r533198_rule	ACF2-SL-000010	CCI-000213	MEDIUM	IBM z/OS permission bits and user audit bits for HFS objects that are part of the Syslog daemon component must be configured properly.	HFS directories and files of the Syslog daemon provide the configuration and executable properties of this product. Failure to properly secure these objects could lead to unauthorized access. This exposure may result in the compromise of the integrity and
SV-223591r533198_rule	ACF2-SL-000020	CCI-000764	MEDIUM	IBM z/OS Syslog daemon must be started at z/OS initialization.	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 orga
SV-223592r836663_rule	ACF2-SL-000030	CCI-000764	MEDIUM	IBM z/OS Syslog daemon must be properly defined and secured.	The Syslog daemon, known as syslogd, is a zOS UNIX daemon that provides a central processing point for log messages issued by other zOS UNIX processes. It is also possible to receive log messages from other network-connected hosts. Some of the IBM Communi
SV-223593r836696_rule	ACF2-SM-000010	CCI-000213	MEDIUM	IBM z/OS DFSMS resource class(es) must be defined to the GSO CLASMAP record in accordance with security requirements.	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
SV-223594r861179_rule	ACF2-SM-000020	CCI-000213	MEDIUM	IBM z/OS DFSMS Program Resources must be properly defined and protected.	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
SV-223595r533198_rule	ACF2-SM-000030	CCI-000213	MEDIUM	IBM z/OS DFSMS control data sets must be protected in accordance with security requirements.	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
SV-223596r533198_rule	ACF2-SM-000040	CCI-000213	MEDIUM	IBM z/OS DFMSM resource class(es)must be defined to the GSO SAFDEF record in accordance with security requirements.	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
SV-223597r861189_rule	ACF2-SM-000050	CCI-000213	MEDIUM	IBM z/OS DFSMS resources must be protected in accordance with the proper security requirements.	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
SV-223598r533198_rule	ACF2-SM-000060	CCI-000366	MEDIUM	IBM z/OS using DFSMS must properly specify SYS(x).PARMLIB(IGDSMSxx), SMS parameter settings.	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 secur
SV-223599r861181_rule	ACF2-TC-000010	CCI-000067	MEDIUM	IBM z/OS PROFILE.TCPIP configuration statements for the TCP/IP stack must be coded properly.	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
SV-223600r853560_rule	ACF2-TC-000020	CCI-002314	MEDIUM	IBM z//OS must be configured to restrict all TCP/IP ports to ports, protocols, and/or services as defined in the PPSM CAL and vulnerability assessments.	Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD no
SV-223601r861182_rule	ACF2-TC-000030	CCI-000213	MEDIUM	IBM z/OS TCP/IP resources must be properly protected.	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
SV-223602r533198_rule	ACF2-TC-000040	CCI-000213	MEDIUM	IBM z/OS permission bits and user audit bits for HFS objects that are part of the Base TCP/IP component must be configured properly.	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
SV-223603r767690_rule	ACF2-TC-000050	CCI-000213	MEDIUM	IBM z/OS data sets for the Base TCP/IP component must be properly protected.	MVS data sets of the Base TCP/IP component provide the configuration, operational, and executable properties of IBMs TCP/IP system product. Failure to properly secure these data sets may lead to unauthorized access resulting in the compromise of the integ
SV-223604r768719_rule	ACF2-TC-000060	CCI-000366	MEDIUM	IBM z/OS Configuration files for the TCP/IP stack must be properly specified.	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 secur
SV-223605r836666_rule	ACF2-TC-000070	CCI-000764	MEDIUM	IBM z/OS Started tasks for the Base TCP/IP component must be defined in accordance with security requirements.	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 orga
SV-223608r853561_rule	ACF2-TN-000010	CCI-002361	MEDIUM	IBM z/OS PROFILE.TCPIP configuration INACTIVITY statement must be configured to 900 seconds.	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, net
SV-223609r853562_rule	ACF2-TN-000020	CCI-000067	MEDIUM	IBM z/OS SMF recording options for the TN3270 Telnet Server must be properly specified.	If events associated with nonlocal administrative access or diagnostic sessions are not logged, a major tool for assessing and investigating attacks would not be available. This requirement addresses auditing-related issues associated with maintenance to
SV-223610r877398_rule	ACF2-TN-000030	CCI-000068	MEDIUM	IBM z/OS SSL encryption options for the TN3270 Telnet Server must be specified properly for each statement that defines a SECUREPORT or within the TELNETGLOBALS.	Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) co
SV-223611r864504_rule	ACF2-TN-000040	CCI-000048	MEDIUM	IBM z/OS TN3270 Telnet Server configuration statement MSG10 text must have the Standard Mandatory DoD Notice and Consent Banner.	A logon banner can be used to inform users about the environment during the initial logon. In the DISA environment, logon banners are used to warn users against unauthorized entry and the possibility of legal action for unauthorized users, and advise all
SV-223613r861183_rule	ACF2-TN-000060	CCI-000366	MEDIUM	IBM z/OS VTAM session setup controls for the TN3270 Telnet Server must be properly specified.	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 secur
SV-223614r533198_rule	ACF2-TN-000070	CCI-001133	MEDIUM	IBM z/OS PROFILE.TCPIP configuration for the TN3270 Telnet Server must have INACTIVE statement properly specified.	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 terminat
SV-223615r861184_rule	ACF2-TS-000010	CCI-000213	MEDIUM	IBM z/OS TSOAUTH resources must be restricted to authorized users.	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
SV-223616r533198_rule	ACF2-US-000010	CCI-000213	HIGH	IBM z/OS UNIX SUPERUSER resource must be protected in accordance with guidelines.	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
SV-223617r861185_rule	ACF2-US-000020	CCI-000213	MEDIUM	IBM z/OS UNIX security parameters in etc/profile must be properly specified.	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 impactin
SV-223618r861186_rule	ACF2-US-000030	CCI-000213	MEDIUM	IBM z/OS UNIX security parameters in /etc/rc must be properly specified.	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 secur
SV-223619r853564_rule	ACF2-US-000040	CCI-000213	MEDIUM	IBM z/OS UNIX resources must be protected in accordance with security requirements.	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
SV-223620r861187_rule	ACF2-US-000050	CCI-000213	MEDIUM	IBM z/OS UNIX MVS HFS directory(s) with other write permission bit set must be properly defined.	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 empl
SV-223621r533198_rule	ACF2-US-000060	CCI-000213	MEDIUM	IBM z/OS BPX resource(s) must be protected in accordance with security requirements.	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
SV-223622r861188_rule	ACF2-US-000070	CCI-000213	MEDIUM	IBM z/OS UNIX SYSTEM FILE SECURITY SETTINGS must be properly protected or specified.	If the operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement a
SV-223623r533198_rule	ACF2-US-000080	CCI-000213	MEDIUM	IBM z/OS UNIX MVS data sets with z/OS UNIX components must be properly protected.	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 empl
SV-223624r533198_rule	ACF2-US-000090	CCI-000213	MEDIUM	IBM z/OS UNIX MVS data sets or HFS objects must be properly protected.	If the operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement a
SV-223625r533198_rule	ACF2-US-000100	CCI-000213	MEDIUM	IBM z/OS UNIX HFS permission bits and audit bits for each directory must be properly protected.	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
SV-223626r861194_rule	ACF2-US-000110	CCI-000213	MEDIUM	IBM z/OS UNIX MVS data sets used as step libraries in /etc/steplib must be properly protected.	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
SV-223628r533198_rule	ACF2-US-000130	CCI-001499	MEDIUM	IBM z/OS UNIX HFS permission bits and audit bits for each directory must be properly protected or specified.	If the operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement a
SV-223629r861190_rule	ACF2-US-000140	CCI-000366	MEDIUM	IBM z/OS UNIX OMVS parameters in PARMLIB must be properly specified.	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 secur
SV-223630r861191_rule	ACF2-US-000150	CCI-000366	MEDIUM	IBM z/OS UNIX HFS MapName files security parameters must be properly specified.	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. The organization must perform a periodic
SV-223631r864507_rule	ACF2-US-000160	CCI-000366	MEDIUM	IBM z/OS UNIX BPXPRMxx security parameters in PARMLIB must be properly specified.	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 impactin
SV-223632r858912_rule	ACF2-US-000170	CCI-000382	MEDIUM	IBM z/OS User exits for the FTP Server must not be used without proper approval and documentation.	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 po
SV-223633r695457_rule	ACF2-US-000180	CCI-000382	MEDIUM	IBM z/OS UNIX security parameters for restricted network service(s) in /etc/inetd.conf must be properly specified.	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 po
SV-223634r861192_rule	ACF2-US-000190	CCI-000764	MEDIUM	IBM z/OS user account for the z/OS UNIX SUPERSUSER userid must be properly defined.	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 orga
SV-223635r861193_rule	ACF2-US-000200	CCI-000764	MEDIUM	IBM z/OS UNIX user accounts must be properly defined.	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 orga
SV-223636r533198_rule	ACF2-US-000210	CCI-000764	MEDIUM	IBM z/OS UNIX groups must be defined with a unique GID.	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 orga
SV-223637r533198_rule	ACF2-US-000220	CCI-000764	MEDIUM	IBM z/OS Attributes of z/OS UNIX user accounts must have a unique GID in the range of 1-99.	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 orga
SV-223638r858918_rule	ACF2-US-000230	CCI-000764	MEDIUM	IBM z/OS Attributes of UNIX user accounts used for account modeling must be defined in accordance with security requirements.	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 orga
SV-223639r533198_rule	ACF2-UT-000010	CCI-000213	MEDIUM	IBM z/OS startup user account for the z/OS UNIX Telnet Server must be defined properly.	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
SV-223640r533198_rule	ACF2-UT-000020	CCI-000213	MEDIUM	IBM z/OS HFS objects for the z/OS UNIX Telnet Server must be properly protected.	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
SV-223641r560914_rule	ACF2-UT-000030	CCI-000048	MEDIUM	IBM z/OS UNIX Telnet Server etc/banner file must have the Standard Mandatory DoD Notice and Consent Banner.	A logon banner can be used to inform users about the environment during the initial logon. In the DISA environment, logon banners are used to warn users against unauthorized entry and the possibility of legal action for unauthorized users, and advise all
SV-223642r864508_rule	ACF2-UT-000040	CCI-001384	MEDIUM	IBM z/OS UNIX Telnet Server warning banner must be properly specified.	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, po
SV-223643r864509_rule	ACF2-UT-000050	CCI-001384	MEDIUM	IBM z/OS UNIX Telnet Server Startup parameters must be properly specified to display the banner.	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, po
SV-223644r533198_rule	ACF2-VT-000010	CCI-000213	MEDIUM	IBM z/OS System data sets used to support the VTAM network must be properly secured.	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
SV-223645r533198_rule	ACF2-VT-000020	CCI-001499	MEDIUM	IBM z/OS VTAM USSTAB definitions must not be used for unsecured terminals.	If the operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement a
SV-245535r768734_rule	ACF2-TC-000090	CCI-000366	MEDIUM	IBM z/OS TCPIP.DATA configuration statement must contain the DOMAINORIGIN or DOMAIN specified for each TCP/IP defined.	If data origin authentication and data integrity verification are not performed, the resultant response could be forged, it may have come from a poisoned cache, the packets could have been intercepted without the resolver's knowledge, or resource records
SV-252547r816937_rule	ACF2-TC-000100	CCI-000067	MEDIUM	IBM z/OS TCP/IP AT-TLS policy must be properly configured in Policy Agent.	If events associated with nonlocal administrative access or diagnostic sessions are not logged, a major tool for assessing and investigating attacks would not be available. This requirement addresses auditing-related issues associated with maintenance to
SV-252705r819060_rule	ACF2-ES-000990	CCI-000205	MEDIUM	The operating system must enforce a minimum 8-character password length.	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 bru
SV-255895r877345_rule	ACF2-FT-000120	CCI-000366	MEDIUM	IBM z/OS FTP.DATA configuration statements for the FTP Server must be specified in accordance with requirements.	This requirement is intended to cover both traditional interactive logons to information systems and general accesses to information systems that occur in other types of architectural configurations (e.g., service-oriented architectures).
SV-255932r881288_rule	ACF2-IC-000010	CCI-000366	MEDIUM	IBM Integrated Crypto Service Facility (ICSF) Configuration parameters must be correctly specified.	IBM Integrated Crypto Service Facility (ICSF) product has the ability to use privileged functions and/or have access to sensitive data. Failure to properly configure parameter values could potentially the integrity of the base product which could result i
SV-255933r881291_rule	ACF2-IC-000020	CCI-000213	MEDIUM	IBM Integrated Crypto Service Facility (ICSF) install data sets must be properly protected.	IBM Integrated Crypto Service Facility (ICSF) product has the ability to use privileged functions and/or have access to sensitive data. Failure to properly restrict access to their data sets could result in violating the integrity of the base product whic
SV-255934r881294_rule	ACF2-IC-000040	CCI-000764	MEDIUM	IBM Integrated Crypto Service Facility (ICSF) Started Task name must be properly identified / defined to the system ACP.	IBM Integrated Crypto Service Facility (ICSF) requires a started task that will be restricted to certain resources, datasets and other system functions. By defining the started task as a userid to the system ACP, It allows the ACP to control the access an
SV-255945r881328_rule	ACF2-IC-000030	CCI-001499	MEDIUM	IBM Integrated Crypto Service Facility (ICSF) STC data sets must be properly protected.	IBM Integrated Crypto Service Facility (ICSF) STC data sets have the ability to use privileged functions and/or have access to sensitive data. Failure to properly restrict access to their data sets could result in violating the integrity of the base prod

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IBM z/OS ACF2 Security Technical Implementation Guide

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