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Check: RHEL-09-411045

RHEL 9 STIG: RHEL-09-411045 (in versions v1 r3 through v1 r1)

Title

All RHEL 9 interactive users must have a primary group that exists. (Cat II impact)

Discussion

If a user is assigned the Group Identifier (GID) of a group that does not exist on the system, and a group with the GID is subsequently created, the user may have unintended rights to any files associated with the group.

Check Content

Verify that all RHEL 9 interactive users have a valid GID. Check that the interactive users have a valid GID with the following command: $ sudo pwck -qr If the system has any interactive users with duplicate GIDs, this is a finding.

Fix Text

Configure the system so that all GIDs are referenced in "/etc/passwd" are defined in "/etc/group". Edit the file "/etc/passwd" and ensure that every user's GID is a valid GID.

Additional Identifiers

Rule ID: SV-258048r926131_rule

Vulnerability ID: V-258048

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)