1.1.5.4 Ensure nosuid option set on /var/log partition

Information

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

Rationale:

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

Solution

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

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

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

# mount -o remount /var/log

See Also

https://workbench.cisecurity.org/files/3807

Item Details

Category: ACCESS CONTROL, MEDIA PROTECTION

References: 800-53|AC-3, 800-53|AC-5, 800-53|AC-6, 800-53|MP-2, CSCv7|14.6

Plugin: Unix

Control ID: 15073dc5437a889c601f26c13e4f41edd975c5ec64824d4e89b05710d127cda7