Title

All TOSS local files and directories must have a valid group owner. (Cat II impact)

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>

Additional Identifiers

Rule ID: SV-253099r991589_rule

Vulnerability ID: V-253099

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.