STIGUI
V-282754CAT II — Medium severitySV-282754r1201614_rule

TOSS 5 must define default permissions for the c shell.

Rule version TOSS-05-000317 · STIG v1 · 2026-08-20

Discussion

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.

Check

Verify the "umask" setting is configured correctly in the "/etc/csh.cshrc" file using 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 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

Configure TOSS 5 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

Identifiers

Group ID
V-282754
Group title
SRG-OS-000480-GPOS-00228
Rule ID
SV-282754r1201614_rule
Check ID
C-87315r1201613_chk
Fix ID
F-87220r1201241_fix