1.1.20 Ensure sticky bit is set on all world-writable directories (Scored)
Profile Applicability
Level 1 - Server Level 1 - Workstation
Description
Setting the sticky bit on world writable directories prevents users from deleting or renaming files in that directory that are not owned by them.
Rationale
This feature prevents the ability to delete or rename files in world writable directories (such as /tmp) that are owned by another user.
Audit
Run the following command to verify no world writable directories exist without the sticky bit set:
# df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type d \( -perm -0002 -a ! -perm -1000 \) 2>/dev/null
Remediation
Run the following command to set the sticky bit on all world writable directories:
# df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type d -perm -0002 2>/dev/null | chmod a+t