/usr/lib/x86_64-linux-gnu/libgstinterfaces-0.10.so.0 is in libgstreamer-plugins-base0.10-0 0.10.36-1ubuntu0.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgstinterfaces-0.10.so.0.25.0