In PHP-FPM, fastcgid php modes the sequence of requests may lead to the segfault (DEF-14825, DEF-14794, DEF-14834), most cases are related to the servers with ionCubeLoader installed.
To upgrade Imunify360 version 5.4.3
If you want to upgrade to the new Imunify360 version right now, you can run the following commands. As the script was updated, you should download a new version before running it.
wget https://repo.imunify360.cloudlinux.com/defence360/imunify-force-update.sh bash imunify-force-update.sh
yum update imunify360-firewall
Ubuntu 16.04 and 18.04 systems:
apt-get update apt-get install --only-upgrade imunify360-firewall