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The Group Identifiers (GIDs) reserved for AIX system accounts must not be assigned to non-system accounts as their primary group GID.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-215194 | AIX7-00-001035 | SV-215194r508663_rule | Medium |
| Description |
|---|
| Reserved GIDs are typically used by system software packages. If non-system groups have GIDs in this range, they may conflict with system software, possibly leading to the group having permissions to modify system files. |
| STIG | Date |
|---|---|
| IBM AIX 7.x Security Technical Implementation Guide | 2023-05-17 |
Details
| Check Text ( C-16392r294033_chk ) |
|---|
| From the command prompt, run the following command: # more /etc/passwd root:!:0:0::/root:/usr/bin/ksh daemon:!:1:1::/etc: bin:!:2:2::/bin: sys:!:3:3::/usr/sys: adm:!:4:4::/var/adm: nobody:!:4294967294:4294967294::/: invscout:*:6:12::/var/adm/invscout:/usr/bin/ksh srvproxy:*:203:0:Service Proxy Daemon:/home/srvproxy:/usr/bin/ksh esaadmin:*:7:0::/var/esa:/usr/bin/ksh sshd:*:212:203::/var/empty:/usr/bin/ksh doejohn:*:704:1776::/home/doej:/usr/bin/ksh Confirm all accounts with a primary GID of 99 and below are used by a system account. If a GID reserved for system accounts, 0 - 99, is used by a non-system account, this is a finding. |
| Fix Text (F-16390r294034_fix) |
|---|
| Change the primary GID for non-system accounts that have reserved GIDs as their primary GIDs using the following command: # chuser pgrp= |