Open-iSCSI rtslib-fb through 2.1.72 has weak permissions for /etc/target/saveconfig.json because shutil.copyfile (instead of shutil.copy) is used, and thus permissions are not preserved.
https://github.com/open-iscsi/rtslib-fb/pull/162
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00012.html