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← Back to IBM AIX 7.x Security Technical Implementation Guide

V-215331

CAT II (Medium)

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

Rule ID

SV-215331r991592_rule

STIG

IBM AIX 7.x Security Technical Implementation Guide

Version

V3R2

CCIs

CCI-000366

Discussion

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

Check Content

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

Change the mode of interactive users' home directories to "0750" or less permissive using the following command:
# chmod 0750 <home directory>