/usr/lib/x86_64-linux-gnu/libglobus_gsi_proxy_core.so.0 is in libglobus-gsi-proxy-core0 8.6-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libglobus_gsi_proxy_core.so.0.8.6