Title

All public directories must be owned by root or an application account. (Cat II impact)

Discussion

If a public directory has the sticky bit set and is not owned by a privileged UID, unauthorized users may be able to modify files created by others. The only authorized public directories are those temporary directories supplied with the system or those designed to be temporary file repositories. The setting is normally reserved for directories used by the system and by users for temporary file storage (e.g., /tmp) and for directories requiring global read/write access.

Check Content

Check the ownership of all public directories. Procedure: # find / -type d -perm -1002 -exec ls -ld {} \; If any public directory is not owned by root or an application user, this is a finding.

Fix Text

Change the owner of public directories to root or an application account. Procedure: # chown root /tmp (Replace root with an application user and/or /tmp with another public directory as necessary.)

Additional Identifiers

Rule ID: SV-226585r854421_rule

Vulnerability ID: V-226585

Group Title: SRG-OS-000312

Expert Comments

CCIs tied to check.

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