Details

The nosuid mount option specifies that the filesystem cannot contain set userid files.

Rationale:

Since the /tmp filesystem is only intended for temporary file storage, set this option to ensure that users cannot create set userid files in /tmp.

# mount -o remount,nosuid /tmp

Solution

Edit the /etc/fstab file and add nosuid to the fourth field (mounting options). See the fstab(5) manual page for more information.

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/3096

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

• 800-53|CM-6
• CSCv6|3.1
• CSCv7|5.1
• CSCv7|13

Source

• Tenable.com/audits