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-235030 | SLES-15-040420 | SV-235030r991590_rule | CCI-000366 | medium |
| Description | ||||
| Setting the most restrictive default permissions ensures that when new accounts are created, they do not have unnecessary access. | ||||
| STIG | Date | |||
| SUSE Linux Enterprise Server 15 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-235030r991590_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", or "UMASK" is missing, this is a finding.
Fix Text (F-38181r619360_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