AlmaLinux OS 9 must define default permissions for logon and nonlogon shells.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269237 | ALMA-09-017840 | SV-269237r1050119_rule | Medium |
| Description |
| Setting the most restrictive default permissions ensures that when new accounts are created they do not have unnecessary access. With a UMASK of 077, files will be created with 0600 permissions (owner read/write only) and directories will have 0700 permissions (owner read/write/execute only). |
| STIG | Date |
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 |
Details
| Check Text (C-73268r1048087_chk) |
| Verify that the "umask" setting for installed shells is "077". Note: If the value of the "umask" parameter is set to "000", the severity is raised to a CAT I. $ grep -ir umask /etc/profile* /etc/bashrc* /etc/csh* /etc/csh.cshrc: umask 077 If the "umask" parameter is set to anything other than "077", this is a finding. |
| Fix Text (F-73169r1049355_fix) |
| Configure AlmaLinux OS 9 to define default permissions for all authenticated users in such a way that the user can only read and modify their own files. Change any found "umask" parameters in the "/etc/bashrc*", "/etc/csh*", and "/etc/profile*" files to "077": umask 077 |