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  3. CIS Ubuntu Linux 16.04 LTS Server L1 V2.0.0
  4. Ensure sticky bit is set on all world-writable directories

Ensure sticky bit is set on all world-writable directories

Details

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.

Solution

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 -a ! -perm -1000 ) 2>/dev/null | xargs -I ‘{}’ chmod a+t ‘{}’

Supportive Information

The following resource is also helpful.

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.

References

Source

Updated on July 16, 2022
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