STIGUI
V-223861CAT II — Medium severitySV-223861r958482_rule

The IBM z/OS user account for the UNIX (RMFGAT) must be properly defined.

Rule version RACF-US-000240 · STIG v9 · 2026-09-01

Discussion

To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system.

Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following:

1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and

2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.

Check

RMFGAT is the userid for the Resource Measurement Facility (RMF) Monitor III Gatherer.

If RMFGAT is not defined, this is Not Applicable.

From a command input screen enter: LISTUSER (RMFGAT) OMVS

If RMFGAT is defined as follows, this is not a finding.

Default group specified as OMVSGRP or STCOMVS A unique, non-zero UID HOME directory specified as "/" Shell program specified as "/bin/sh"

Fix

Define the RMFGAT user account as specified below:

Default group specified as OMVSGRP or STCOMVS A unique, non-zero UID HOME directory specified as "/" Shell program specified as "/bin/sh"

Identifiers

Group ID
V-223861
Group title
SRG-OS-000104-GPOS-00051
Rule ID
SV-223861r958482_rule
Check ID
C-25534r868914_chk
Fix ID
F-25522r868915_fix