STIGQter: STIG Summary: IBM AIX 7.x Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

The Group Identifiers (GIDs) reserved for AIX system accounts must not be assigned to non-system accounts as their primary group GID.

DISA Rule

SV-215194r508663_rule

Vulnerability Number

V-215194

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

AIX7-00-001035

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Change the primary GID for non-system accounts that have reserved GIDs as their primary GIDs using the following command:
# chuser pgrp=<non_reserved_group_name> <non_system_user_name>

Check Contents

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.

Vulnerability Number

V-215194

Documentable

False

Rule Version

AIX7-00-001035

Severity Override Guidance

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.

Check Content Reference

M

Target Key

4012

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