TOSS must define default permissions for all authenticated users in such a way that the user can only read and modify their own files.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-252968	SRG-OS-000480-GPOS-00228	TOSS-04-020290	SV-252968r991590_rule	2024-05-30	2

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

ℹ️ Check
Verify TOSS defines default permissions for all authenticated users in such a way that the user can only read and modify their own files. Check for the value of the "UMASK" parameter in "/etc/login.defs" file 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. $ 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.

ℹ️ Check

Verify TOSS defines default permissions for all authenticated users in such a way that the user can only read and modify their own files. Check for the value of the "UMASK" parameter in "/etc/login.defs" file 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. $ 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.

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