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V-215339

CAT II (Medium)

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

Rule ID

SV-215339r991589_rule

STIG

IBM AIX 7.x Security Technical Implementation Guide

Version

V3R2

CCIs

CCI-000366

Discussion

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.

Check Content

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

Add a group to the system for each GID referenced without a corresponding group by running "mkgroup" command.