SLEM 5 default permissions must be defined in such a way that all authenticated users can only read and modify their own files.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-261349	SRG-OS-000480-GPOS-00228	SLEM-05-411015	SV-261349r996502_rule	2024-06-04	1

Description
Setting the most restrictive default permissions ensures that when new accounts are created, they do not have unnecessary access.

ℹ️ Check
Verify SLEM 5 defines default permissions for all authenticated users in such a way that the users can only read and modify their own files with the following command: > grep -i "^umask" /etc/login.defs UMASK 077 If the "UMASK" variable is set to "000", the severity is raised to a CAT I and this is a finding. If the value of "UMASK" is not set to "077", the line is commented out, or the line is missing, this is a finding.

ℹ️ Check

Verify SLEM 5 defines default permissions for all authenticated users in such a way that the users can only read and modify their own files with the following command: > grep -i "^umask" /etc/login.defs UMASK 077 If the "UMASK" variable is set to "000", the severity is raised to a CAT I and this is a finding. If the value of "UMASK" is not set to "077", the line is commented out, or the line is missing, this is a finding.

✔️ Fix
Configure SLEM 5 to define the default permissions for all authenticated users in such a way that the users can only read and modify their own files. Add or modify the following line in the "/etc/login.defs" file: UMASK 077