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V-248719

CAT II (Medium)

OL 8 default permissions must be defined in such a way that all authenticated users can read and modify only their own files.

Rule ID

SV-248719r991590_rule

STIG

Oracle Linux 8 Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-000366

Discussion

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

Check Content

Verify OL 8 defines default permissions for all authenticated users in such a way that the user can read and modify only their own files with the following command: 
 
$ sudo grep -i "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 the value of "UMASK" is not set to "077", "UMASK" is commented out, or "UMASK" is missing completely, this is a finding.

Fix Text

Configure OL 8 to define the default permissions for all authenticated users in such a way that the user can read and modify only their own files. 
 
Edit the "UMASK" parameter in the "/etc/login.defs" file to match the example below: 
 
UMASK 077