cyberstrikeus 2.17 Set Sticky Bit on All World-Writable Directories (Scored)
Profile Applicability
- Level 1
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 Procedure
Using Command Line
df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type d \( -perm -0002 -a ! -perm -1000 \) 2>/dev/null
Expected Result
No output should be returned. If any directories are listed, the sticky bit is not set on them.
Remediation
Using Command Line
df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type d -perm -0002 2>/dev/null | xargs chmod a+t
Default Value
By default, the sticky bit is set on /tmp but may not be set on other world-writable directories.
References
- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
Profile
Level 1 - Scored