/usr/lib/libgssdp-1.0.so.3 is in libgssdp-1.0-3 0.14.7-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libgssdp-1.0.so.3.0.0
/usr/lib/libgssdp-1.0.so.3.0.0