/usr/lib/x86_64-linux-gnu/libundead.so.0 is in libundead0 1.0.9-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libundead.so.1.0.7
/usr/lib/x86_64-linux-gnu/libundead.so.1.0.7