RHEL-10-400325 RHEL 10 must define default permissions for all authenticated users in such a way that the user can read and modify only their own files.
All changes in this version
Maps to AC-3 via CCI-000213
Title
RHEL 10 must define default permissions for all authenticated users in such a way that the user can read and modify only their own files.
Control
Verify RHEL 10 defines default permissions for all authenticated users in such a way that the user can only read and modify their own files with the following command: Note: If the value of the "umask" parameter is set to "000" in "/etc/login.defs" file, the Severity is raised to a CAT I. $ sudo grep -i umask /etc/login.defs 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.
Discussion
Setting the most restrictive default permissions ensures that when new accounts are created, they do not have unnecessary access.
Related controls
CCI-000213
Fix
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/login.defs" file to "077": umask 077