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

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-258045RHEL-09-411030SV-258045r958482_ruleCCI-000135medium
Description
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
STIGDate
Red Hat Enterprise Linux 9 Security Technical Implementation Guide2026-02-05

Related Frameworks

1 mapping across 4 frameworks
SCF0 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.

MON-03.1Sensitive Event Log Information
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (41) 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-16Security and Privacy Attributes
1.00
AC-17(1)Monitoring and Control
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(4)Automated Audit Actions
1.00
AC-3(3)Mandatory Access Control
1.00
AC-6(8)Privilege Levels for Code Execution
1.00
AC-6(9)Log Use of Privileged Functions
1.00
AU-10Non-repudiation
1.00
AU-12Audit Record Generation
1.00
AU-12(3)Changes by Authorized Individuals
1.00

+31 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.

3.3.1
1.00
3.3.2
1.00
CCI1 mapping
CCI-000135
1.00

Details

Check Text (C-258045r958482_chk)

Verify that RHEL 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.

Fix Text (F-61710r926121_fix)

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