All local interactive user home directories must have mode 0750 or less permissive.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-75565	UBTU-16-010750	SV-90245r1_rule		Medium

Description
Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.

STIG	Date
Canonical Ubuntu 16.04 Security Technical Implementation Guide	2020-05-29

Details

Check Text ( C-75269r1_chk )
Verify the assigned home directory of all local interactive users has a mode of "0750" or less permissive. Check the home directory assignment for all non-privileged users with the following command: Note: This may miss interactive users that have been assigned a privileged User Identifier (UID). Evidence of interactive use may be obtained from a number of log files containing system logon information. # ls -ld $(awk -F: '($3>=1000)&&($1!="nobody"){print $6}' /etc/passwd) drwxr-x--- 2 smithj admin 4096 Jun 5 12:41 smithj If home directories referenced in "/etc/passwd" do not have a mode of "0750" or less permissive, this is a finding.

Check Text ( C-75269r1_chk )

Verify the assigned home directory of all local interactive users has a mode of "0750" or less permissive.

Check the home directory assignment for all non-privileged users with the following command:

Note: This may miss interactive users that have been assigned a privileged User Identifier (UID). Evidence of interactive use may be obtained from a number of log files containing system logon information.

# ls -ld $(awk -F: '($3>=1000)&&($1!="nobody"){print $6}' /etc/passwd)

drwxr-x--- 2 smithj admin 4096 Jun 5 12:41 smithj

If home directories referenced in "/etc/passwd" do not have a mode of "0750" or less permissive, this is a finding.

Fix Text (F-82193r1_fix)
Change the mode of interactive user’s home directories to "0750". To change the mode of a local interactive user’s home directory, use the following command: Note: The example will be for the user "smithj". # chmod 0750 /home/smithj