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V-253100

CAT II (Medium)

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

Rule ID

SV-253100r991589_rule

STIG

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

Version

V2R5

CCIs

CCI-000366

Discussion

Unowned files and directories may be unintentionally inherited if a user is assigned the same User Identifier "UID" as the UID of the un-owned files.

Check Content

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.

Fix Text

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>