All files and directories must have a valid owner.

From SOLARIS 10 X86 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECCD-2, ECCD-1

Associated with: CCI-000366

SV-785r2_rule All files and directories must have a valid owner.

Vulnerability discussion

Unowned files and directories may be unintentionally inherited if a user is assigned the same UID as the UID of the unowned files.

Check content

Check the system for files with no assigned owner. Procedure: # find / -nouser -print If any files have no assigned owner, this is a finding.

Fix text

All directories and files (executable and data) will have an identifiable owner and group name. Either trace files to an authorized user, change the file's owner to root, or delete them. Determine the legitimate owner of the files and use the chown command to set the owner and group to the correct value. If the legitimate owner cannot be determined, change the owner to root (but make sure none of the changed files remain executable because they could be Trojan horses or other malicious code). Examine the files to determine their origin and the reason for their lack of an owner/group.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.