/usr/lib/python2.7/dist-packages/zope/app/component/browser/siteregistration.pt is in python-zope.app.component 3.9.3-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zope/app/component/browser/../../../../../../../share/pyshared/zope/app/component/browser/siteregistration.pt