OL 8 default permissions must be defined in such a way that all authenticated users can read and modify only their own files.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-248719	OL08-00-020351	SV-248719r991590_rule		Medium

Description
Setting the most restrictive default permissions ensures that when new accounts are created, they do not have unnecessary access.

STIG	Date
Oracle Linux 8 Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-52153r779721_chk )
Verify OL 8 defines default permissions for all authenticated users in such a way that the user can read and modify only their own files with the following command: $ sudo grep -i "umask" /etc/login.defs UMASK 077 If the "UMASK" variable is set to "000", this is a finding with the severity raised to a CAT I. If the value of "UMASK" is not set to "077", "UMASK" is commented out, or "UMASK" is missing completely, this is a finding.

Check Text ( C-52153r779721_chk )

Verify OL 8 defines default permissions for all authenticated users in such a way that the user can read and modify only their own files with the following command:

$ sudo grep -i "umask" /etc/login.defs

UMASK 077

If the "UMASK" variable is set to "000", this is a finding with the severity raised to a CAT I.

If the value of "UMASK" is not set to "077", "UMASK" is commented out, or "UMASK" is missing completely, this is a finding.

Fix Text (F-52107r779722_fix)
Configure OL 8 to define the default permissions for all authenticated users in such a way that the user can read and modify only their own files. Edit the "UMASK" parameter in the "/etc/login.defs" file to match the example below: UMASK 077