2.3 Set nosuid option for /tmp Partition

Information

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.

Solution

Edit the /etc/fstab file and add nosuid to the fourth field (mounting options). See the
fstab(5) manual page for more information.# mount -o remount,nosuid /tmp

See Also

https://workbench.cisecurity.org/files/91

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6, CSCv6|3.1, CSCv7|5.1

Plugin: Unix

Control ID: b0b1d2048b5d536bf05f2ff1cc95e314b2bf52941a92f20ac33f5513410173df