All AIX users home directories must have mode 0750 or less permissive.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-215331	AIX7-00-003018	SV-215331r508663_rule		Medium

Description
Excessive permissions on home directories allow unauthorized access to user files.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2021-06-16

Details

Check Text ( C-16529r294444_chk )
Check the home directory mode of each interactive user in "/etc/passwd": #cut -d : -f 6 /etc/passwd \| xargs -n1 ls -ld \| more drwxr-xr-x 20 root system 4096 Jan 28 13:46 / drwxr-xr-x 33 root system 8192 Jan 28 13:51 /etc lrwxrwxrwx 1 bin bin 8 Jan 24 07:23 /bin -> /usr/bin drwxrwxr-x 4 bin bin 256 Mar 23 2017 /usr/sys drwxrwxr-x 15 root adm 4096 Jan 24 12:26 /var/adm drwxr-xr-x 2 root sys 4096 Jan 24 08:43 /usr/lib/uucp drwxr-xr-x 6 root system 4096 Jan 24 07:34 /var/adm/invscout drwxr-xr-x 3 ipsec ipsec 256 Jan 24 08:43 /etc/ipsec drwxr-xr-x 2 sshd system 256 Aug 11 2017 /home/srvproxy drwxr-xr-x 8 esaadmin system 256 Jan 24 09:02 /var/esa drwxr-x--- 2 doejohn staff 256 Jan 25 13:18 /home/doejohn If an interactive user's home directory's mode is more permissive than "0750", this is a finding. NOTE: Application directories are allowed and may need "0755" permissions (or greater) for correct operation.

Check Text ( C-16529r294444_chk )

Check the home directory mode of each interactive user in "/etc/passwd":

#cut -d : -f 6 /etc/passwd | xargs -n1 ls -ld | more
drwxr-xr-x 20 root system 4096 Jan 28 13:46 /
drwxr-xr-x 33 root system 8192 Jan 28 13:51 /etc
lrwxrwxrwx 1 bin bin 8 Jan 24 07:23 /bin -> /usr/bin
drwxrwxr-x 4 bin bin 256 Mar 23 2017 /usr/sys
drwxrwxr-x 15 root adm 4096 Jan 24 12:26 /var/adm
drwxr-xr-x 2 root sys 4096 Jan 24 08:43 /usr/lib/uucp
drwxr-xr-x 6 root system 4096 Jan 24 07:34 /var/adm/invscout
drwxr-xr-x 3 ipsec ipsec 256 Jan 24 08:43 /etc/ipsec
drwxr-xr-x 2 sshd system 256 Aug 11 2017 /home/srvproxy
drwxr-xr-x 8 esaadmin system 256 Jan 24 09:02 /var/esa
drwxr-x--- 2 doejohn staff 256 Jan 25 13:18 /home/doejohn

If an interactive user's home directory's mode is more permissive than "0750", this is a finding.

NOTE: Application directories are allowed and may need "0755" permissions (or greater) for correct operation.

Fix Text (F-16527r294445_fix)
Change the mode of interactive users' home directories to "0750" or less permissive using the following command: # chmod 0750