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Check: RHEL-09-411110

RHEL 9 STIG: RHEL-09-411110 (in versions v1 r3 through v1 r1)

Title

RHEL 9 groups must have unique Group ID (GID). (Cat II impact)

Discussion

To ensure accountability and prevent unauthenticated access, groups must be identified uniquely to prevent potential misuse and compromise of the system.

Check Content

Verify that RHEL 9 contains no duplicate GIDs for interactive users with the following command: $ cut -d : -f 3 /etc/group | uniq -d If the system has duplicate GIDs, this is a finding.

Fix Text

Edit the file "/etc/group" and provide each group that has a duplicate GID with a unique GID.

Additional Identifiers

Rule ID: SV-258061r926170_rule

Vulnerability ID: V-258061

Group Title: SRG-OS-000104-GPOS-00051

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-000764	The information system uniquely identifies and authenticates organizational users (or processes acting on behalf of organizational users).

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
IA-2	Identification And Authentication (Organizational Users)