RHEL 9 must define default permissions for the c shell.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-258073 | RHEL-09-412060 | SV-258073r1045157_rule | CCI-000366 | medium |
| Description | ||||
| The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typically ignored or required to be "0". This requirement applies to the globally configured system defaults and the local interactive user defaults for each account on the system. Satisfies: SRG-OS-000480-GPOS-00228, SRG-OS-000480-GPOS-00227 | ||||
| STIG | Date | |||
| Red Hat Enterprise Linux 9 Security Technical Implementation Guide | 2025-05-14 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · 2 · disa_xccdf · related
Details
Check Text (C-258073r1045157_chk)
Verify the "umask" setting is configured correctly in the "/etc/csh.cshrc" file with the following command:
Note: If the value of the "umask" parameter is set to "000" "/etc/csh.cshrc" file, the Severity is raised to a CAT I.
$ grep umask /etc/csh.cshrc
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-61738r926205_fix)
Configure RHEL 9 to define default permissions for all authenticated users using the c shell.
Add or edit the lines for the "umask" parameter in the "/etc/csh.cshrc" file to "077":
umask 077