Oracle Linux 9 Security Technical Implementation Guide

The Oracle Linux 9 Security Technical Implementation Guide (V1 R7) has 450 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R7

CurrentPublished Wed Sep 30 2026

OL 9 duplicate User IDs (UIDs) must not exist for interactive users.

Oracle Linux 9 Security Technical Implementation Guide

Assessment Title

Rule Text

OL 9 duplicate User IDs (UIDs) must not exist for interactive users.

Description

Discussion Text

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

Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000121-GPOS-00062, SRG-OS-000042-GPOS-00020

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-271832

Rule

SV-271832r1092208_rule

Severity

medium

Rule Version

OL09-00-003001

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify that OL 9 contains no duplicate UIDs for interactive users with the following command:

$ sudo awk -F ":" 'list[$3]++{print $1, $3}' /etc/passwd 

If output is produced and the accounts listed are interactive user accounts, this is a finding.

Implementation Procedure

Fix Text

Edit the file "/etc/passwd" and provide each interactive user account that has a duplicate UID with a unique UID.

STIG check 390 of 450 in the Oracle Linux 9 STIG checklist

← Previous · V-271831OL 9 must be configured so that the root account is the only account having unrestricted access to the system.Next · V-271833 →OL 9 local interactive users must have a home directory assigned in the /etc/passwd file.