/usr/lib/x86_64-linux-gnu/libasprintf.so is in libasprintf-dev 0.18.3.1-1ubuntu3.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libasprintf.so.0.0.0
/usr/lib/x86_64-linux-gnu/libasprintf.so.0.0.0