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V-281083

CAT II (Medium)

RHEL 10 must define default permissions for the system default profile.

Rule ID

SV-281083r1184689_rule

STIG

Red Hat Enterprise Linux 10 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000213

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 Content

Verify the RHEL 10 "umask" setting is configured correctly in the "/etc/profile" file with the following command:

Note: If the value of the "umask" parameter is set to "000" in the "/etc/profile" file, the Severity is raised to a CAT I.

$ sudo grep umask /etc/profile
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

Configure RHEL 10 to define default permissions for all authenticated users in such a way that the user can read and modify only their own files.

Add or edit the lines for the "umask" parameter in the "/etc/profile" file to "077":

umask 077