1.1.16 Ensure nosuid option set on /dev/shm partition

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Information

The nosuid mount option specifies that the filesystem cannot contain setuid files. Setting this option on a file system prevents users from introducing privileged programs onto the system and allowing non-root users to execute them.

Solution

Edit the /etc/fstab file and add nosuid to the fourth field (mounting options) for the /dev/shm partition. See the fstab(5) manual page for more information. Run the following command to remount /dev/shm : # mount -o remount,nosuid /dev/shm Notes - /dev/shm is not specified in /etc/fstab despite being mounted by default. The following line will implement the recommended /dev/shm mount options in /etc/fstab: tmpfs /dev/shm tmpfs defaults,nodev,nosuid,noexec 0 0

See Also

https://workbench.cisecurity.org/files/2171

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6(1), CSCv7|5.1

Plugin: Unix

Control ID: 547f85fea3145ab976fea61081463c4a2ebb3ae09e1ab4087890735c609a7bcc