The Oracle Linux operating system 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-221718 | OL07-00-020240 | SV-221718r991590_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 7 Security Technical Implementation Guide | 2024-08-26 |
Details
| Check Text (C-23433r419226_chk) |
| Verify the operating system defines default permissions for all authenticated users in such a way that the user can only read and modify their own files. Check for the value of the "UMASK" parameter in "/etc/login.defs" file with the following command: Note: If the value of the "UMASK" parameter is set to "000" in "/etc/login.defs" file, the Severity 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-23422r419227_fix) |
| Configure the operating system 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 line for the "UMASK" parameter in "/etc/login.defs" file to "077": UMASK 077 |