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All AIX Group Identifiers (GIDs) referenced in the /etc/passwd file must be defined in the /etc/group file.


Overview

Finding ID Version Rule ID IA Controls Severity
V-91625 AIX7-00-003033 SV-101723r1_rule Medium
Description
If a user is assigned the GID of a group not existing on the system, and a group with that GID is subsequently created, the user may have unintended rights to the group.
STIG Date
IBM AIX 7.x Security Technical Implementation Guide 2020-02-24

Details

Check Text ( C-90779r3_chk )
Verify that there are no GIDs referenced in "/etc/passwd" that are not defined in "/etc/group":

# cut -d: -f4 /etc/passwd
0
1
2
3
4
203
204

# cut -d: -f3 /etc/group
0
1
2
3
4
203
204

If there are GID's listed in the "/etc/passwd" file that are not listed in the "/etc/group" file, this is a finding.
Fix Text (F-97823r1_fix)
Add a group to the system for each GID referenced without a corresponding group by running "mkgroup" command.