Details

Set noexec on the shared memory partition to prevent programs from executing from there.

Rationale:

Setting this option on a file system prevents users from executing programs from shared memory. This deters users from introducing potentially malicious software on the system.

Solution

Edit the /etc/fstab file and add noexec to the fourth field (mounting options). Look for entries that have mount points that contain /dev/shm. See the fstab(5) manual page for more information.

# mount -o remount,noexec /dev/shm

Default Value:

OS Default: N/A

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/3096

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.

References

• 800-53|CM-6
• 800-53|CM-11
• CSCv6|3.1
• CSCv7|2.6
• CSCv7|5.1
• CSCv7|13

Source

• Tenable.com/audits