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The sticky bit must be set on all public directories.


Overview

Finding ID Version Rule ID IA Controls Severity
V-806 GEN002500 SV-63691r1_rule Low
Description
Failing to set the sticky bit on the public directories allows unauthorized users to delete files in the directory structure. 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.
STIG Date
Oracle Linux 5 Security Technical Implementation Guide 2020-02-25

Details

Check Text ( C-52297r1_chk )
Check all world-writable directories have the sticky bit set.

Procedure:
# find / -type d -perm -002 ! -perm -1000 > wwlist

If the sticky bit is not set on a world-writable directory, this is a finding.
Fix Text (F-54269r1_fix)
Set the sticky bit on all public directories.

Procedure:
# chmod 1777 /tmp

(Replace /tmp with the public directory missing the sticky bit, if necessary.)