STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Jul 2026:

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

DISA Rule

SV-253100r991589_rule

Vulnerability Number

V-253100

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-04-040580

Severity

CAT II

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

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

$ sudo chown <user> <file>

Check Contents

Verify all local files and directories on TOSS have a valid owner 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 -nouser

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

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

Vulnerability Number

V-253100

Documentable

False

Rule Version

TOSS-04-040580

Severity Override Guidance

Verify all local files and directories on TOSS have a valid owner 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 -nouser

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

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

Check Content Reference

M

Target Key

5469