OL 9 must define default permissions for all authenticated users in such a way that the user can only read and modify their own files.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271696 | OL09-00-002304 | SV-271696r1091800_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 | |||
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 | |||
Details
Check Text (C-271696r1091800_chk)
Verify that OL 9 defines default permissions for all authenticated users in such a way that the user can only read and modify their own files with the following command:
Note: If the value of the "UMASK" parameter is set to "000" in "/etc/login.defs" file, the severity of this requirement is raised to a CAT I.
$ grep -i umask /etc/login.defs
UMASK 077
If the value for the "UMASK" parameter is not "077", or the "UMASK" parameter is missing or is commented out, this is a finding.
Fix Text (F-75653r1091799_fix)
Configure OL 9 to define default permissions for all authenticated users in such a way that the user can only read and modify their own files.
Add or edit the lines for the "UMASK" parameter in the "/etc/login.defs" file to "077":
UMASK 077