AlmaLinux OS 9 must define default permissions for logon and nonlogon shells.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-269237 | SRG-OS-000480-GPOS-00228 | ALMA-09-017840 | SV-269237r1050119_rule | 2025-02-20 | 1 |
| 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). |
| ℹ️ Check |
|---|
| 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 |
|---|
| 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 |