Ensure nosuid option set on /dev/shm partition

How it is checked

Audit method: Shell command

if ! findmnt -kn /dev/shm >/dev/null 2>&1; then echo compliant; elif findmnt -kn /dev/shm | grep -qw -- nosuid; then echo compliant; else echo /dev/shm' is mounted without nosuid'; fi

Expected output

compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Run the following command to remount /dev/shm : # mount -o remount,nosuid /dev/shm /etc is stateless on Container-Optimized OS. Therefore, /etc cannot be used to make these changes persistent across reboots. The steps mentioned above needs to be performed after every boot.

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

tmaegis scan --target cos