Ubuntu 22.04
Ubuntu 22.04 LTS default filesystem permissions must be defined in such a way that all authenticated users can read and modify only their own files
Description
Setting the most restrictive default permissions ensures newly created accounts do not have unnecessary access.
Check
Verify Ubuntu 22.04 LTS defines default permissions for all authenticated users in such a way that the user can read and modify only their own files by using the following command: $ grep -i '^\s*umask' /etc/login.defs UMASK 077 If the "UMASK" variable is set to "000", this is a finding with the severity raised to a CAT I.If "UMASK" is not set to "077", is commented out, or is missing, this is a finding.
Fix
Configure Ubuntu 22.04 LTS to define the default permissions for all authenticated users in such a way that the user can read and modify only their own files. Add or modify the following line in the "/etc/login.defs" file: UMASK 077