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1.1.2.4.3 Ensure nosuid option set on /var partition

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Information

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

Since the /var filesystem is only intended for variable files such as logs, set this option to ensure that users cannot create setuid files in /var.

Solution

- IF - a separate partition exists for /var.

Edit the /etc/fstab file and add nosuid to the fourth field (mounting options) for the /var partition.

Example:

<device> /var <fstype> defaults,rw,nosuid,nodev,noexec,relatime 0 0

Run the following command to remount /var with the configured options:

# mount -o remount /var

See Also

https://workbench.cisecurity.org/benchmarks/18208

Item Details

References: CSCv7|14.6

Plugin: Unix

Control ID: 77d7dc8d75879942300f801a0f9efd1cfc5b88724efcf7dc644a62a25a545cde