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The system default umask for the bash shell must be 077.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-38651 | RHEL-06-000342 | SV-50452r1_rule | Low |
| Description |
|---|
| The umask value influences the permissions assigned to files when they are created. A misconfigured umask value could result in files with excessive permissions that can be read and/or written to by unauthorized users. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 6 Security Technical Implementation Guide | 2018-03-01 |
Details
| Check Text ( C-46211r1_chk ) |
|---|
| Verify the "umask" setting is configured correctly in the "/etc/bashrc" file by running the following command: # grep "umask" /etc/bashrc All output must show the value of "umask" set to 077, as shown below: # grep "umask" /etc/bashrc umask 077 umask 077 If the above command returns no output, or if the umask is configured incorrectly, this is a finding. |
| Fix Text (F-43600r1_fix) |
|---|
| To ensure the default umask for users of the Bash shell is set properly, add or correct the "umask" setting in "/etc/bashrc" to read as follows: umask 077 |