The SUSE operating system default permissions must be defined in such a way that all authenticated users can only read and modify their own files.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-77173	SLES-12-010620	SV-91869r1_rule		Medium

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

STIG	Date
SLES 12 Security Technical Implementation Guide	2020-01-07

Details

Check Text ( C-76783r1_chk )
Verify the SUSE operating system defines default permissions for all authenticated users in such a way that the users can only read and modify their own files. Check the system default permissions with the following command: # grep -i "umask" /etc/login.defs UMASK 077 If the "UMASK" variable is set to "000", the severity is raised to a CAT I, and this is a finding. 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-76783r1_chk )

Verify the SUSE operating system defines default permissions for all authenticated users in such a way that the users can only read and modify their own files.

Check the system default permissions with the following command:

# grep -i "umask" /etc/login.defs

UMASK 077

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

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-83869r1_fix)
Configure the SUSE operating system to define the default permissions for all authenticated users in such a way that the users can only read and modify their own files. Add or edit the "UMASK" parameter in the "/etc/login.defs" file to match the example below: UMASK 077