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CA-TSS user accounts must uniquely identify system users.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-223952TSS0-ES-000790SV-223952r998495_ruleCCI-004045medium
Description
To assure individual accountability and prevent unauthorized access, organizational users must be individually identified and authenticated. A group authenticator is a generic account used by multiple individuals. Use of a group authenticator alone does not uniquely identify individual users. Examples of the group authenticator is the UNIX OS "root" user account, the Windows "Administrator" account, the "sa" account, or a "helpdesk" account. For example, the UNIX and Windows operating systems offer a "switch user" capability allowing users to authenticate with their individual credentials and, when needed, "switch" to the administrator role. This method provides for unique individual authentication prior to using a group authenticator. Users (and any processes acting on behalf of users) need to be uniquely identified and authenticated for all accesses other than those accesses explicitly identified and documented by the organization, which outlines specific user actions that can be performed on the operating system without identification or authentication. Requiring individuals to be authenticated with an individual authenticator prior to using a group authenticator allows for traceability of actions, as well as adding an additional level of protection of the actions that can be taken with group account knowledge. Satisfies: SRG-OS-000109-GPOS-00056, SRG-OS-000121-GPOS-00062, SRG-OS-000125-GPOS-00065
STIGDate
IBM z/OS TSS Security Technical Implementation Guide2026-06-15

Related Frameworks

3 mappings across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (9) 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.

IAC-01.2Authenticate, Authorize and Audit (AAA)
1.00
IAC-02Identification & Authentication for Organizational Users
1.00
IAC-02.1Group Authentication
1.00
IAC-03Identification & Authentication for Non-Organizational Users
1.00
IAC-04Identification & Authentication for Devices
1.00
IAC-05Identification & Authentication for Third-Party Technology Assets, Applications and/or Services (TAAS)
1.00
MNT-05Remote Maintenance
0.50
MNT-05.1Auditing Remote Maintenance
0.50
MNT-05.2Remote Maintenance Notifications
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (83) 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-10Concurrent Session Control
1.00
AC-12Session Termination
1.00
AC-17(10)Authenticate Remote Commands
1.00
AC-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(10)Shared and Group Account Credential Change
1.00
AC-2(11)Usage Conditions
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00

+73 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) 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.

3.7.5
1.00
CCI3 mappings
CCI-000804
1.00
CCI-000877
1.00
CCI-004045
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (3) 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.

PR.AA-01
1.00
PR.AA-03
1.00
PR.AA-05
1.00

Who does this work

7 NICE work roles and 5 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-223952r998495_chk)

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

Fix Text (F-25613r516256_fix)

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