/usr/lib/libitktiff.so.3.20 is in libinsighttoolkit3.20 3.20.1+git20120521-6build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libitktiff.so.3.20.1
/usr/lib/libitktiff.so.3.20.1