1.1.12 Ensure noexec option set on /var/tmp partition

Information

The noexec mount option specifies that the filesystem cannot contain executable binaries.

Since the /var/tmp filesystem is only intended for temporary file storage, set this option to ensure that users cannot run executable binaries from /var/tmp

Solution

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

Run the following command to remount /var/tmp :

# mount -o remount,noexec /var/tmp

See Also

https://workbench.cisecurity.org/files/3682

Item Details

Category: CONFIGURATION MANAGEMENT, SYSTEM AND SERVICES ACQUISITION

References: 800-53|CM-2, 800-53|CM-6, 800-53|CM-7, 800-53|CM-7(1), 800-53|CM-9, 800-53|SA-3, 800-53|SA-8, 800-53|SA-10, CSCv7|2.6

Plugin: Unix

Control ID: e5ad3c208a4454c250ba323ca47f77c756cdd3f9b7559c7403eef39e0b5278ce