Open-iSCSI targetcli-fb through 2.1.52 has weak permissions for /etc/target (and for the backup directory and backup files).
{ "ubuntu_priority": "medium" }
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "1:2.1.51-0ubuntu1+esm1", "binary_name": "targetcli-fb" } ] }