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IBM z/OS Emergency LOGONIDs must be properly defined.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-223558ACF2-OS-000220SV-223558r991589_ruleCCI-000366medium
Description
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 based on conditions and circumstances may be critical to limit access to resources and data to comply with operational or mission access control requirements. Thus, the operating system must be configured to enforce the specific conditions or circumstances under which organization-defined accounts can be used (e.g., by restricting usage to certain days of the week, time of day, or specific durations of time).
STIGDate
IBM z/OS ACF2 Security Technical Implementation Guide2025-06-24

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (8) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CFG-01Configuration Management Program
1.00
END-01Endpoint Device Management (EDM)
1.00
END-04Malicious Code Protection (Anti-Malware)
1.00
END-06Endpoint File Integrity Monitoring (FIM)
1.00
MON-01Continuous Monitoring
1.00
MON-01.7File Integrity Monitoring (FIM)
1.00
CFG-02Secure Baseline Configurations
0.50
CFG-02.7Approved Configuration Deviations
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (100) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-12Session Termination
1.00
AC-16(1)Dynamic Attribute Association
1.00
AC-17(1)Monitoring and Control
1.00
AC-2Account Management
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(11)Usage Conditions
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00
AC-24(1)Transmit Access Authorization Information
1.00
AC-25Reference Monitor
1.00

+90 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.4.1
1.00
3.4.2
1.00
CCI1 mapping
CCI-000366
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (5) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

DE.CM-09
1.00
PR.PS-01
1.00
PR.DS-10
0.50
PR.PSPlatform Security
0.50
PR.PS-05
0.50

Who does this work

10 NICE work roles and 9 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-223558r991589_chk)

Ask the system administrator to provide a list of all emergency logonids available to the site along with the associated function of each. If there are no emergency logonids defined, ask the system administrator for an alternate documented procedure to handle emergencies. If there are no emergency logonids and no documented emergency procedure, this is a finding. If emergency logonids exist, at a minimum, a logonid will exist with the security administration attributes specified in accordance with the following requirements: For emergency IDs with security administration privileges, but which cannot access and update system data sets: ACCOUNT JCL JOB MONITOR NONON CNCL RULEVLD RSRCVLD SECURITY TSO TSOPROC(xxxxxxxx) TSOACCT(none) An additional class of logonids can exist to perform all operating system functions except ESM administration. These emergency logonid/logonid(s) will have ability to access and update all system data sets, but will not have security administration privileges. See the following requirements: JCL JOB MONITOR NON CNCL (Will force logging of all activity.) TSO TSOPROC(xxxxxxxx) TSOACCT(none) All emergency logonid/logonid(s) are to be implemented with logging to provide an audit trail of their activities. All emergency logonid/logonid(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 logonid/logonid(s) will have distinct, different passwords in SYS1.UADS and in the ESM, 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 ESM. All emergency logonid/logonid(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 logonid is released for use, its password is to be reset by the ISSO within 12 hours. If all the emergency logonid items above are true, this is not a finding. If any item above is untrue, this is a finding.

Fix Text (F-25219r803625_fix)

Ensure that Emergency Logonids use these fields to enforce restrictions for Emergency logonids. Two classes of emergency logonids may exist. The following privileges and specifications will be used for these logonids: Note: Only the emergency logonid with the security administration logonid attributes is required. (1) For emergency IDs with the ability to access and update all system data sets, but which do not have security administration privileges: NOFSRETAIN JCL JOB MONITOR NON CNCL (Will force logging of all activity.) TSO TSOPROC(xxxxxxxx) TSOACCT(none) Example: SET LID INSERT logonid NOFSRETAIN JCL JOB MONITOR NON-CNCL TSO TSOPRC(xxxxxxxx) TSOACCT(none) (2) For emergency IDs with security administration privileges, but which cannot access and update system data sets: ACCOUNT NOFSRETAIN JCL JOB MONITOR NONON CNCL RULEVLD RSRCVLD SECURITY TSO TSOPROC(xxxxxxxx) TSOACCT(none) Example: SET LID INSERT logonid ACCOUNT NOFSRETAIN JCL JOB MONITOR RULEVLD RSRCVLD NONON-CNCL SECURITY TSO TSOPRC(xxxxxxxx) TSOACCT(none) If no emergency logonids are in use on the system, develop and document a procedure to manage emergencies access to the system.