1.1.9 Ensure noexec option set on /var/tmp partition

Information

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

Rationale:

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/3399

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-7(2), 800-53|CM-8(3), 800-53|CM-10, 800-53|CM-11, CSCv6|2, CSCv7|2.6

Plugin: Unix

Control ID: b948d0f2b45c307f875d90bdb806a880248ce54f30c78e193963a1a332a44551