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V-253099

CAT II (Medium)

All TOSS local files and directories must have a valid group owner.

Rule ID

SV-253099r991589_rule

STIG

Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide

Version

V2R5

CCIs

CCI-000366

Discussion

Files without a valid group owner may be unintentionally inherited if a group is assigned the same Group Identifier (GID) as the GID of the files without a valid group owner.

Check Content

Verify all local files and directories on TOSS have a valid group with the following command:

Note: The value after -fstype must be replaced with the filesystem type. XFS is used as an example.

$ sudo find / -fstype xfs -nogroup

If any files on the system do not have an assigned group, this is a finding.

Note: Command may produce error messages from the /proc and /sys directories.

Fix Text

Either remove all files and directories from TOSS that do not have a valid group, or assign a valid group to all files and directories on the system with the "chgrp" command:

$ sudo chgrp <group> <file>