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


Finding ID Version Rule ID IA Controls Severity
V-237769 UBTU-18-010451 SV-237769r648743_rule Medium
Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.
Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide 2022-12-06


Check Text ( C-32990r567709_chk )
Verify the assigned home directory of all local interactive users has a mode of "0750" or less permissive 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.

$ sudo ls -ld $(awk -F: '($3>=1000)&&($7 !~ /nologin/){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-40942r648738_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".

$ sudo chmod 0750 /home/smithj