All local interactive user home directories must be group-owned by the home directory owners primary group.

From Red Hat Enterprise Linux 7 Security Technical Implementation Guide

Associated with: CCI-000366

SV-86645r4_rule All local interactive user home directories must be group-owned by the home directory owners primary group.

Vulnerability discussion

If the Group Identifier (GID) of a local interactive user’s home directory is not the same as the primary GID of the user, this would allow unauthorized access to the user’s files, and users that share the same group may not be able to access files that they legitimately should.

Check content

Verify the assigned home directory of all local interactive users is group-owned by that user’s primary GID. Check the home directory assignment for all local interactive users on the system with the following command: # ls -ld $(egrep ':[0-9]{4}' /etc/passwd | cut -d: -f6) -rwxr-x--- 1 smithj users 18 Mar 5 17:06 /home/smithj Check the user's primary group with the following command: # grep users /etc/group users:x:250:smithj,jonesj,jacksons If the user home directory referenced in "/etc/passwd" is not group-owned by that user’s primary GID, this is a finding.

Fix text

Change the group owner of a local interactive user’s home directory to the group found in "/etc/passwd". To change the group owner of a local interactive user’s home directory, use the following command: Note: The example will be for the user "smithj", who has a home directory of "/home/smithj", and has a primary group of users. # chgrp users /home/smithj

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