The Oracle Linux operating system must be configured so that all files and directories contained in local interactive user home directories have a valid owner.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-221732	OL07-00-020660	SV-221732r744079_rule		Medium

Description
Unowned files and directories may be unintentionally inherited if a user is assigned the same User Identifier "UID" as the UID of the un-owned files.

STIG	Date
Oracle Linux 7 Security Technical Implementation Guide	2021-12-06

Details

Check Text ( C-23447r744077_chk )
Verify all files and directories in a local interactive user's home directory have a valid owner. Check the owner of all files and directories in a local interactive user's home directory with the following command: Note: The example will be for the user "smithj", who has a home directory of "/home/smithj". $ sudo ls -lLR /home/smithj -rw-r--r-- 1 smithj smithj 18 Mar 5 17:06 file1 -rw-r--r-- 1 smithj smithj 193 Mar 5 17:06 file2 -rw-r--r-- 1 smithj smithj 231 Mar 5 17:06 file3 If any files or directories are found without an owner, this is a finding.

Check Text ( C-23447r744077_chk )

Verify all files and directories in a local interactive user's home directory have a valid owner.

Check the owner of all files and directories in a local interactive user's home directory with the following command:

Note: The example will be for the user "smithj", who has a home directory of "/home/smithj".

$ sudo ls -lLR /home/smithj
-rw-r--r-- 1 smithj smithj 18 Mar 5 17:06 file1
-rw-r--r-- 1 smithj smithj 193 Mar 5 17:06 file2
-rw-r--r-- 1 smithj smithj 231 Mar 5 17:06 file3

If any files or directories are found without an owner, this is a finding.

Fix Text (F-23436r744078_fix)
Either remove all files and directories from the system that do not have a valid user, or assign a valid user to all unowned files and directories on OL 7 with the "chown" command: Note: The example will be for the user smithj, who has a home directory of "/home/smithj". $ sudo chown smithj /home/smithj/