The Photon operating system must set the "umask" parameter correctly.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-256583 | PHTN-30-000114 | SV-256583r991590_rule | CCI-000366 | medium |
| Description | ||||
| The "umask" value influences the permissions assigned to files when they are created. The "umask" setting in "login.defs" controls the permissions for a new user's home directory. By setting the proper "umask", home directories will only allow the new user to read and write files there. | ||||
| STIG | Date | |||
| VMware vSphere 7.0 vCenter Appliance Photon OS Security Technical Implementation Guide | 2024-12-16 | |||
Details
Check Text (C-256583r991590_chk)
At the command line, run the following command:
# grep ^UMASK /etc/login.defs
Example result:
UMASK 077
If "UMASK" is not configured to "077", this a finding.
Note: "UMASK" should only be specified once in login.defs.
Fix Text (F-60201r887422_fix)
Navigate to and open:
/etc/login.defs
Ensure the "UMASK" line is uncommented and set to the following:
UMASK 077